Publications by authors named "Chuanqi Feng"

34 Publications

Enhanced the photoelectrochemical performance of BiXO (X = W, Mo) for detecting hexavalent chromium by modification of CuS.

J Environ Sci (China) 2021 May 16;103:185-195. Epub 2020 Nov 16.

Health Assessment Center, Zhejiang Provincial Key Laboratory of Watershed Science and Health, College of Public Health and Management, University Town, Chashan, Wenzhou Medical University, Wenzhou 325035, China. Electronic address:

In this work, BiXO (X = W, Mo) are synthesized at different temperatures. The results of tests find the optimal temperatures of BiWO and BiMoO are 180 and 160°C (BW-180, BM-160). Then, BW-180 and BM-160 are further compounded with different contents of CuS. The results of photoelectrochemical (PEC) tests show that CuS can improve the PEC performance of semiconductor materials, and it has better performance when CuS mass fraction is 5%. These maybe the photoelectron potentials generated by CuS/BiXO (X = Mo, W) heterojunction reduce the combination of photogenerated electrons and holes. When the PEC sensor based on 5%-CuS/BW-180 detects Cr(VI), it has a linear range of 1-80 μmol/L with detection limit of 0.95 μmol/L, while the PEC sensor based on 5%-CuS/BM-160 detects Cr(VI) has a linear range of 0.5-230 μmol/L and a detection limit of 0.12 μmol/L. Thus, 5%-CuS/BiXO has potential application in hexavalent chromium detection.
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http://dx.doi.org/10.1016/j.jes.2020.10.019DOI Listing
May 2021

Synthesis and Electrochemical Properties of Germanium (Ge) Nanoparticles/Multiwalled Carbon Nanotubes Composite as Anode Material for Lithium Battery.

J Nanosci Nanotechnol 2021 Apr;21(4):2254-2258

Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials & Ministry of Education Key Laboratory for Synthesis and Applications of Organic Functional Molecules, Hubei University, Wuhan 430062, China.

Germanium (Ge) nanoparticles/multiwalled carbon nanotubes (Ge/MWCNTs) composite is synthesized by solvothermal method combined with heat treatment under H₂ atmosphere. The Ge particles are buried in MWCNTs network to form expected composite. The MWCNTs not only improve the conductivity of the composite but also act as a flexible matrix to buffer the volume change of germanium nanoparticles during the process of insertion and de-insertion in lithium ion battery system. The Ge/MWCNTs composite behaves better cycle performance and higher rate capability than those of pure germanium (Ge) nanoparticles. The Ge/MWCNTs maintained discharge capacity as 1040 mAh·g after 60 cycles at the current density of 100 mA·g. It is a promising anode material for lithium ion battery application.
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http://dx.doi.org/10.1166/jnn.2021.19035DOI Listing
April 2021

Synthesis of Tin Oxide/Sponge Carbon Composite as Anode Material for Lithium-Ion Battery.

J Nanosci Nanotechnol 2021 Mar;21(3):1493-1499

Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials and Ministry of Education Key Laboratory for Synthesis and Applications of Organic Functional Molecules, Hubei University, Wuhan, 430062, China.

Tin oxide/sponge carbon composite (SnO₂/C) is synthesized by solvothermal reaction. The expected electrode materials are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman spectrum. Related electrochemical properties are carried out by battery comprehensive testing system. The composite could remain its specific capacity at 660.5 mAh g after 200 cycles and behaved superior rate performance. The experimental results show that SnO₂/C composite not only owned improved conductivity but also stable frame structure during lithiation/delithiation processes. So SnO₂/C composite behaved higher reversible specific capacity and rate performance than those of pure SnO₂ or SnC₂O₄. Based on its outstanding electrochemical performances, the SnO₂/C anode electrode is a hopeful candidate for future application in lithium ion battery system.
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http://dx.doi.org/10.1166/jnn.2021.18989DOI Listing
March 2021

Synthesis and Electrochemical Properties of CoMn₂O₄ as Novel Material for Lithium Ion Battery Application.

J Nanosci Nanotechnol 2020 Dec;20(12):7665-7672

Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials & Ministry-of-Education Key Laboratory for Synthesis and Applications of Organic Functional Molecules, Hubei University, Wuhan, 430062, China.

The pure phase CoMn₂O₄ samples are successfully prepared by solvothermal method combined with calcination at different temperatures (600, 700 and 800 °C). The structure and morphology for CoMn₂O₄ samples are characterized by X-ray diffraction (XRD) and Scanning electron microscopy (SEM) techniques. The electrochemical properties for different samples were tested by battery testing system and electrochemical workstation. The results showed that the calcination temperatures have important effects on their electrochemical properties. The sample synthesized at 600 °C (CMO-600) exhibits uniform microspheres composed of some nano-particles. As a novel anode material for lithium-ion batteries (LIBs). The CMO-600 has a reversible specific capacity of 1270 mA g retained after 100 circles at current density of 100 mA g under a potential window from 3.0 to 0.01 V (vs. Li/Li). It exhibits both high reversible capacity and good rate performance. So CMO-600 is a promising anode material for lithium ion battery application.
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http://dx.doi.org/10.1166/jnn.2020.18626DOI Listing
December 2020

Simultaneous determination of heavy metals by an electrochemical method based on a nanocomposite consisting of fluorinated graphene and gold nanocage.

Mikrochim Acta 2020 06 29;187(7):414. Epub 2020 Jun 29.

Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China.

Fluorinated graphene/gold nanocage (FGP/AuNC) nanocomposite was developed for simultaneous determination of heavy metals using square wave anodic stripping voltammetry. Under optimized conditions, with a buffer pH of 5.0, a deposition potential of - 1.25 V, and a deposition time of 140 s, the method can obtain the best results. The FGP/AuNC electrode exhibits low limits of detection (0.08, 0.09, 0.05, 0.19, 0.01 μg L), wide linear ranges (6-7000, 4-6000, 6-5000, 4-4000, 6-5000 μg L), and well-separated stripping peaks (at - 1.10, - 0.77, - 0.50, - 0.01, 0.31 V vs Ag/AgCl) towards Zn, Cd, Pb, Cu, and Hg, respectively. Furthermore, the FGP/AuNC electrode is also used for simultaneous determination of Zn, Cd, Pb, Cu, and Hg in real samples (peanut, rape bolt, and tea). Highly consistent results are found between the electrochemical method and atomic fluorescence spectrometry/inductively coupled plasma-mass spectrometry. The method has been successfully applied to the determination of heavy metal ions in agricultural food. Graphical abstract Schematic representation of simultaneous determination of heavy metal ions by electrochemical method. The FGP/AuNC (fluorinated graphene/gold nanocage) electrode is used to simultaneous determination of Zn, Cd, Pb, Cu, and Hg by square wave anode stripping voltammetry.
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http://dx.doi.org/10.1007/s00604-020-04393-6DOI Listing
June 2020

1-(2-Cyanoethyl)pyrrole enables excellent battery performance at high temperature via the synergistic effect of Lewis base and C[triple bond, length as m-dash]N functional groups.

Chem Commun (Camb) 2020 Jul;56(60):8420-8423

Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials & Ministry of Educational Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China.

The electrolyte of a lithium ion battery is unstable and is easily decomposed at high temperature, which can lead to the degradation of battery performance. To solve this problem, herein a novel electrolyte additive 1-(2-cyanoethyl)pyrrole (CP) has been proposed to improve the electrochemical performance of LiFePO4 batteries at high temperature. The capacity retention of the battery with 1 wt% CP is 76.7%, while that of the battery without the additive is 38.1% after 200 cycles at 60 °C. Theoretical calculation results reveal that the binding energy of CP and PF5/HF is much higher than that of the solvents in the electrolyte. Surface analysis of the electrodes demonstrates that CP can reduce the decomposition of the electrolyte, and restrain the dissolution of transition metals in the electrolyte at high temperature. TEM/XPS results indicate that CP can modify the protective film on the surface of the cathode material and promote the formation of more regular and thinner CEI films. The promotion of the CP additive is of great significance for improving the high temperature performance of lithium ion batteries and is expected to be applied on a large scale.
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http://dx.doi.org/10.1039/d0cc01528hDOI Listing
July 2020

Synthesis and Electrochemical Properties of BiMoO/Carbon Anode for Lithium-Ion Battery Application.

Materials (Basel) 2020 Mar 4;13(5). Epub 2020 Mar 4.

Depatment of Chemical and Process Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH, UK.

High capacity electrode materials are the key for high energy density Li-ion batteries (LIB) to meet the requirement of the increased driving range of electric vehicles. Here we report the synthesis of a novel anode material, BiMoO/palm-carbon composite, via a simple hydrothermal method. The composite shows higher reversible capacity and better cycling performance, compared to pure BiMoO. In 0-3 V, a potential window of 100 mA/g current density, the LIB cells based on BiMoO/palm-carbon composite show retention reversible capacity of 664 mAh·g after 200 cycles. Electrochemical testing and density functional theory calculations are used to study the fundamental mechanism of Li ion incorporation into the materials. These studies confirm that Li ions incorporate into BiMoO via insertion to the interstitial sites in the MoO-layer, and the presence of palm-carbon improves the electronic conductivity, and thus enhanced the performance of the composite materials.
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http://dx.doi.org/10.3390/ma13051132DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7085012PMC
March 2020

Low-Cost NiP/NiS Heterostructured Bifunctional Electrocatalyst toward Highly Efficient Overall Urea-Water Electrolysis.

ACS Appl Mater Interfaces 2020 Jan 2;12(2):2225-2233. Epub 2020 Jan 2.

School of Chemistry, Physics and Mechanical Engineering , Queensland University of Technology (QUT) , 2 George Street , Brisbane , QLD 4000 , Australia.

Water splitting is a sustainable approach for production of hydrogen to fuel some clean energy technologies. This process, unfortunately, has been significantly impeded by the puzzles in either the efficient but economically unaffordable noble-metal-based catalysts or the low-cost but kinetically sluggish abundant-element-based catalysts. Particularly, the discovery of efficient bifunctional catalysts that can simultaneously trigger the reactions of both anode and cathode for overall water splitting still remains as a grand challenge. Herein, a novel low-cost bifunctional NiP/NiS heterostructured electrocatalyst, which is active for both the urea oxidation reaction at the anode and the hydrogen evolution reaction at the cathode, is innovated for high-efficiency overall splitting of urea-rich wastewater. A systematic configuration of a Ni foam (NF)-supported NiP/NiS catalyst electrode exhibits superior catalytic activity and stability. The NiP/NiS/NF||NiP/NiS/NF cell needs only 1.453 V to reach a current density of 100 mA/cm in basic urea-containing water, while it is 1.693 V for a reference noble-based Pt/C/NF||IrO/NF electrolysis cell. This work therefore not only contributes to develop a low-cost, high-efficiency, bifunctional electrocatalyst but also provides a practically feasible approach for urea-rich wastewater treatment.
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http://dx.doi.org/10.1021/acsami.9b14350DOI Listing
January 2020

Synthesis of MoO₃/V₂O/C Composite as Novel Anode for Li-Ion Battery Application.

J Nanosci Nanotechnol 2020 May;20(5):2911-2916

Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials and Ministry of Education Key Laboratory for Synthesis and Applications of Organic Functional Molecules, Hubei University, Wuhan, 430062, China.

The MoO₃/V₂O/C, MoO₃/C and V₂O/C are synthesized by electrospinning combined with heat treatment. These samples are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy and thermogravimetric analysis (TG) techniques. The results show that sample MoO₃/V₂O/C is a composite composed from MoO₃, V₂O and carbon. It takes on morphology of the nanofibers with the diameter of 200~500 nm. The TG analysis result showed that the carbon content in the composite is about 40.63%. Electrochemical properties for these samples are studied. When current density is 0.2 A g, the MoO₃/V₂O/C could retain the specific capacity of 737.6 mAh g after 200 cycles and its coulomb efficiency is 92.99%, which proves that MoO₃/V₂O/C has better electrochemical performance than that of MoO₃/C and V₂O/C. The EIS and linear Warburg coefficient analysis results show that the MoO₃/V₂O/C has larger Li+ diffusion coefficient and superior conductivity than those of MoO₃/C or V₂O/C. So MoO₃/V₂O/C is a promising anode material for lithium ion battery application.
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http://dx.doi.org/10.1166/jnn.2020.17441DOI Listing
May 2020

Synthesis of Ni/NiO@MIL-101(Cr) Composite as Novel Anode for Lithium-Ion Battery Application.

J Nanosci Nanotechnol 2019 Dec;19(12):8063-8070

Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials and Ministry of Education Key Laboratory for Synthesis and Applications of Organic Functional Molecules, Hubei University, Wuhan, 430062, China.

The poor conductivity is one of the prime reasons restricted MOFs to be applied in the lithium-ion battery system. For the sake of ameliorate this issue, the Ni/NiO was well loaded on the surface of Cr-based metal organic frameworks (MIL-101) by solution impregnation and reduction method to form Ni/NiO@MIL-101(Cr) composites. The as-synthesized Ni/NiO@MIL-101(Cr) was characterized by X-ray powder diffractions, X-ray photoelectron spectroscopy, field emission scanning electron microscope and transmission electron microscope techniques. When used as anode for LIBs, the Ni/NiO@MIL-101(Cr) composite exhibited high reversible capacity (891 mAh g after 100 cycles at a current density of 200 mA g) and stable cycle performance, the coulombic efficiency can maintain in the whole cycle above 95.0%. The reasons for that Ni/NiO@MIL-101(Cr) behaved outstanding electrochemical properties were discussed also. The Ni/NiO@MIL-101(Cr) can be used as promising material for lithium-ion battery application.
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http://dx.doi.org/10.1166/jnn.2019.16763DOI Listing
December 2019

Visible light driven photoelectrochemical sensor for chromium(VI) by using BiOI microspheres decorated with metallic bismuth.

Mikrochim Acta 2019 05 11;186(6):345. Epub 2019 May 11.

Department of Environmental Sciences, Zhejiang Provincial Key Laboratory of Watershed Science and Health, Wenzhou Medical University, Wenzhou, 325035, People's Republic of China.

Composites were prepared from BiOI and Bi/BiOI-X (where x can be 1, 2, 3, or 4) by a one-step solvothermal method and used to design a photoelectrochemical (PEC) assay for chromium(VI). The chemical composition and morphology of the materials were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. The results of UV-vis DRS (Diffuse reflection spectra) and photoluminescence show the composites to have higher visible light absorption and a lower electron recombination rate compared to BiOI alone. Photogenerated electrons reduce hexavalent chromium to trivalent chromium, and the consumption of electrons cause noticeable enhances of the photocurrent density after the addition of Cr(VI). Thus, the Cr(VI) concentration can be measured by monitoring the increase of photocurrent density. The Bi/BiOI-3 material displays the best performance for detecting Cr(VI). The method has a wide linear range (1 to 230 μM) and a low detection limit of 0.3 μM (at S/N = 3). It is stable, selective, reproducible and was applied to the determination of nitrite in spiked tap water and lake water samples. Graphical abstract Schematic presentation of a electrochemical sensor based on Bi/BiOI for the determination of Cr(VI).
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http://dx.doi.org/10.1007/s00604-019-3463-0DOI Listing
May 2019

Integrated Polypyrrole@Sulfur@Graphene Aerogel 3D Architecture via Advanced Vapor Polymerization for High-Performance Lithium-Sulfur Batteries.

ACS Appl Mater Interfaces 2019 May 8;11(20):18448-18455. Epub 2019 May 8.

Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials & Ministry of Educational Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering , Hubei University , Wuhan 430062 , P. R. China.

Although lithium-sulfur batteries have been regarded as the most promising candidates for next-generation energy storage devices with high specific capacity, their rapid capacity decay, mainly caused by volume expansion and dissolution of polysulfides, has limited their practical applications. Aiming at these issues, herein, we have designed an ideal three-dimensional (3D)-structured polypyrrole@sulfur@graphene aerogel (PPy@S@GA) as an efficient sulfur host via advanced pyrrole vapor polymerization. GA with an interconnected 3D porous structure provides an excellent conductive network for electrons and a channel for ion transfer, as well as a physical barrier or absorber for the polysulfides. In addition, physical confinement and chemical adsorption are further strengthened by the PPy coating layer with polar nitrogen. The electrode with the PPy@S@GA 3D structure delivered a superior initial discharge specific capacity of 1135 mA h g and a capacity of 741 mA h g after 500 cycles at a rate of 0.5 C, with capacity fading as low as 0.031% per cycle, superior to both a sulfur electrode and a S@GA electrode. These results demonstrate that GA as a sulfur host further coated with PPy is a promising cathode for pursuing high-performance Li-S batteries.
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http://dx.doi.org/10.1021/acsami.9b04167DOI Listing
May 2019

NiN/NF as Bifunctional Catalysts for Both Hydrogen Generation and Urea Decomposition.

ACS Appl Mater Interfaces 2019 Apr 1;11(14):13168-13175. Epub 2019 Apr 1.

Institute for Sustainable Energy/College of Sciences , Shanghai University , Shanghai 200444 , China.

Oxygen evolution reaction (OER) has a high overpotential, which can significantly reduce the energy efficiency in water decomposition. Using urea oxidation reaction (UOR) to replace OER has been a feasible and energy-saving approach because of its lower electrode potential. Furthermore, UOR is also an important process in wastewater treatment. This paper successfully synthesizes a high-performance bifunctional catalyst for urea electrolysis. The catalyst is nickel nitride bead-like nanospheres array supported on Ni foam (NiN/NF). Several characterization methods are used to analyze the catalyst's morphology, structure, and composition as well as catalytic activity/stability, including X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and electrochemical methods (cyclic voltammetry, linear sweep voltammetry, electrochemical impedance spectroscopy, and CAM). A concurrent two-electrode electrolyzer (NiN/NF∥NiN/NF) is constructed and used to validate the catalyst performance, and the results show that the cell achieves 100 mA·cm at 1.42 V, while the cell voltage of Pt/C∥IrO is 1.60 V, indicating that the NiN/NF catalyst is superior to precious metals.
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http://dx.doi.org/10.1021/acsami.8b19052DOI Listing
April 2019

Quaternary Iron Nickel Cobalt Selenide as an Efficient Electrocatalyst for Both Quasi-Solid-State Dye-Sensitized Solar Cells and Water Splitting.

Chem Asian J 2019 Apr 12;14(7):1034-1041. Epub 2019 Mar 12.

Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, 2205 Songhu Road, Shanghai, 200438, P. R. China.

Iron nickel cobalt selenides are synthesized through a one-step hydrothermal method. Quaternary Fe Ni Co Se demonstrates multifunctionality and shows high electrocatalytic activity for quasi-solid-state dye-sensitized solar cells with a power conversion efficiency of 8.42 %, the hydrogen evolution reaction, the oxygen evolution reaction, and water splitting. The electric power output from tandem quasi-solid-state dye-sensitized solar cells under one-sun illumination is sufficient to split water and exhibits a solar-to-hydrogen conversion efficiency of 5.58 % with Fe Ni Co Se as the electrocatalyst in this integrated system. Owing to a remarkable synergistic effect, quaternary Fe Ni Co Se is proven to be superior to ternary nickel cobalt selenide in terms of conductivity, electrocatalytic activity, and photovoltaic performance.
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http://dx.doi.org/10.1002/asia.201900009DOI Listing
April 2019

Synthesis of CuO/g-CN composites, and their application to voltammetric sensing of glucose and dopamine.

Mikrochim Acta 2018 12 10;186(1):10. Epub 2018 Dec 10.

School of Nuclear Technology and Chemistry & Biology, Hubei University of Science and Technology, Xianning, 437100, China.

The preparation of 3 kinds of carbonaceous nanocomposites by hydrothermal treatment and subsequent calcination described. The first comprises a nanomaterial of type CuO/g-CN, with g-CN in mass fractions of 2, 5 and 7 wt%, respectively. The second comprises CuO/porous carbon (5 wt%), and the third comprises CuO/carbon spheres (5 wt%). All of them were employed to modify a glassy carbon electrode (GCE) to obtain electrochemical sensors for glucose and dopamine. The GCE modified with CuO/g-CN (5 wt%) displays the highest electrocatalytic activity towards glucose and dopamine. Figures of merit for sensing glucose (in 0.1 M NaOH solution) include a wide linear range (0.5 μM to 8.5 mM), a detection limit of 0.150 μM, and a sensitivity of 0.274 μA·μM·cm (at a working potential of 0.60 V vs. Ag/AgCl). The respective data for dopamine (in pH 7.0 solution) are linear ranges from 0.2-16.0 μM and 16.0-78.7 μM, a lower detection limit of 60 nM, and an electrochemical sensitivity of 0.834 and 0.331 μA·μM·cm (at a working potential of 0.22 V vs. Ag/AgCl). The good performance of the modified GCE is attributed to the synergetic interactions between CuO and the appropriate fraction of g-CN, and the improvement of conductivity. Graphical abstract Schematic presentation of a electrochemical sensor based on CuO/g-CN for the determination of glucose and dopamine.
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http://dx.doi.org/10.1007/s00604-018-3120-zDOI Listing
December 2018

Novel Cobalt-Doped NiSe Chalcogenides (Co NiSe) as High Active and Stable Electrocatalysts for Hydrogen Evolution Reaction in Electrolysis Water Splitting.

ACS Appl Mater Interfaces 2018 Nov 13;10(47):40491-40499. Epub 2018 Nov 13.

Energy, Mining and Environment , National Research Council of Canada , Vancouver , British Columbia V6T1W5 , Canada.

In this paper, novel cobalt-doped NiSe chalcogenides (Co NiSe, x = 0.05, 0.1, 0.2, 0.3, and 0.4) are successfully synthesized and studied as high active and stable electrocatalysts for hydrogen evolution reaction (HER) in electrolysis water splitting. The morphologies, structures, and composition of these as-prepared catalysts are characterized by X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy, and transmission electron microscopy. The electrochemical tests, such as linear sweep voltammetry, cyclic voltammetry, electrochemical impedance spectroscopy, and chronoamperometry testing, are performed to evaluate these catalysts' HER catalytic performance including activity and stability. The results indicate that a suitable doping can result in synergetic effect for increasing the catalytic performance. Among different catalysts, CoNiSe shows the highest HER performance. After introducing the reduced graphene oxide (rGO) into this catalyst as the support, the resulted CoNiSe/rGO shows even better performance than unsupported CoNiSe, which are confirmed by the reduction of HER overpotential of CoNiSe/rGO to 103 mV compared to 153 mV of CoNiSe at a current density of 10 mA/cm, and the smaller Tafel slope (43 mV/dec) and kinetic resistance (21.34 Ω) than those of CoNiSe (47 mV/dec, 30.23 Ω). Furthermore, the large electrochemical active surface area and high conductivity of such a CoNiSe/rGO catalyst, induced by rGO introduction, are confirmed to be responsible for the high HER performance.
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http://dx.doi.org/10.1021/acsami.8b12797DOI Listing
November 2018

Hierarchical Porous NiO/β-NiMoO Heterostructure as Superior Anode Material for Lithium Storage.

Chempluschem 2018 Oct 3;83(10):915-923. Epub 2018 Jul 3.

Hubei Collaborative Innovation Centre for, Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for Synthesis, and Applications of Organic Functional Molecules, Hubei University, Wuhan, 430062, P. R. China.

Ternary transition metal oxides (TTMOs) have attracted considerable attention for rechargeable batteries because of their fascinating properties. However, the unsatisfactory electrochemical performance originating from the poor intrinsic electronic conductivity and inferior structural stability impedes their practical applications. Here, the novel hierarchical porous NiO/β-NiMoO heterostructure is fabricated, and exhibits high reversible capacity, superior rate capability, and excellent cycling stability in Li-ion batteries (LIBs), which is much better than the corresponding single-phase NiMoO and NiO materials. The significantly enhanced electrochemical properties can be attributed to its superior structural characteristics, including the large surface area, abundant pores, fast charge transfer, and catalytic effect of the intermediate product of metallic nickel. The NiO/β-NiMoO heterostructure delivers a high capacity of 1314 mA h g at 0.2 A g after 100 cycles. Furthermore, even after 400 cycles at 1 A g , the reversible capacity remains at around 500 mA h g . These results indicate that the NiO/β-NiMoO heterostructure shows great potential as an anode material for high-performance LIBs.
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http://dx.doi.org/10.1002/cplu.201800220DOI Listing
October 2018

Synthesis and Electrochemical Performance of NiCO₂S₄ as Anode for Lithium-Ion Batteries.

J Nanosci Nanotechnol 2018 Aug;18(8):5749-5755

Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Applications of Organic Functional Molecules, Hubei University, Wuhan 430062, China.

NiCO2S4 with different morphology was controllably fabricated by a facile hydrothermal and solvothermal route. The as-obtained samples were analyzed and characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The results reveal that the sample (NCS-1) prepared by hydrothermal method manifest a mixture of nanorods and nanospheres. The sample (NCS-2) synthesized by solvothermal process takes on spherical nanoparticles (NPs). It is found that the morphology of the sample has much influence on the electrochemical property. When applied as anode for lithium-ion batteries (LIBs), the NiCO2S4 NPs (NCS-2) possess the highest reversible discharge capacity of 1469.8 mAh g-1 compared with other two samples at the current density of 100 mA g-1 in the voltage window of 0.01-3 V. Additionally, it remains a specific capacity of 1163.7 mAh g-1 at a current density of 100 mAg-1 after 100 cycles. This excellent electrochemical performance arises from its unique mesoporous structure, which can reduce the transport lengths of both lithium ions and electrons. The mesoporous NiCO2S4 NPs show the great potential development of high-capacity anode materials for LIBs.
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http://dx.doi.org/10.1166/jnn.2018.15468DOI Listing
August 2018

Controlled Preparation of Co9S8 for Small Molecule Sensing Platform.

J Nanosci Nanotechnol 2018 Aug;18(8):5582-5590

The Chinese People's Armed Police Forces Academy, Langfang 065000, China.

Cobalt sulfides with different atomic ratios were synthesized by two different methods. Electrochemical testing was used to compare the prepared cobalt sulfides samples, and a series of physical characterizations was carried out. The results demonstrated that the better materials had the phase of Co9S8. Furthermore, the pompon-like Co9S8 had a larger specific surface area (45.46 m2 g-1), which offered more active sites for the detection of hydrogen peroxide and glucose. The sensor based on pompon-like Co9S8 displayed a wide linear response ranged from 1.50 μM to 8.51 mM, a favorable sensitivity of 20.80 μA mM-1 cm-2 and a detection limit of 0.45 μM (signal to noise ratio of 3) for hydrogen peroxide. Additionally, the sensor also had a linear response ranged from 21.50 μM to 1.18 mM, and a higher sensitivity of 185.32 μA mM-1 cm-2 for glucose. The sensors also exhibited excellent performances in selectivity, stability, and reproducibility.
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http://dx.doi.org/10.1166/jnn.2018.15389DOI Listing
August 2018

Facile Synthesis and Lithium Storage Properties of ZnCoCO₃ Microspheres.

J Nanosci Nanotechnol 2018 Apr;18(4):2629-2636

Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Applications of Organic Functional Molecules, Hubei University, Wuhan 430062, China.

Zn1-xCoxCO3 (ZCCO) microspheres were synthesized by a modified solvothermal method (ball milling-solvothermal combination method) using ZnCl2, CoCl2, and NH4HCO3 as raw materials. All samples were characterized by X-ray diffractometer (XRD), Fourier transform infrared spectra (FT-IR), and Scanning electron microscopy (SEM) technique. The results showed the introduction of Co and molar ratio of Zn and Co play crucial roles in the morphology and electrochemical performance of the ZCCO. As anode materials for lithium ion battery (LIB), all ZCCO electrodes possess high specific capacities and good cycle performance. The as-obtained Zn0.5Co0.5CO3 electrode exhibits higher discharge capacity (1526 mAh/g) and better rate properties with the reversible capacity of 976 mAh/g after 100 cycles when the molar ratio of Zn/Co is 1:1. Moreover, the present work provides a new and simple approach to the fabrication of novel anode materials (transition metal carbonates) for LIB applications.
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http://dx.doi.org/10.1166/jnn.2018.14538DOI Listing
April 2018

Self-Assembled LiNiCoMnO Nanosheet Cathode with High Electrochemical Performance.

ACS Appl Mater Interfaces 2017 Nov 1;9(45):39560-39568. Epub 2017 Nov 1.

Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei University , Wuhan 430062, China.

We have fabricated self-assembled LiNiCoMnO nanosheets via a facile synthesis method combining coprecipitation with the hydrothermal method. Scanning electron microscopic images show that the self-assembly processes for the LiNiCoMnO nanosheets depend on the reaction time and temperature. The nanosheet structure is uniform, and the width and thickness of the nanosheets are in the ranges of 0.7-1.5 μm and 10-100 nm, respectively. As a cathode material, the as-synthesized LiNiCoMnO nanosheets have demonstrated outstanding electrochemical performance. The initial specific capacity was 193 mAh g, and the capacity was maintained at 189 mAh g after 100 cycles at 0.2 C, and 155 mAh g at 1 C (after 1000 cycles). The LiNiCoMnO nanosheets have efficient contact with the electrolyte and short Li diffusion paths, as well as sufficient void spaces to accommodate large volume variation. The nanosheets are thus beneficial to the diffusion of Li in the electrode. The enhanced electrical conductance and excellent capacity demonstrate the great potential of LiNiCoMnO nanosheets for energy storage applications.
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http://dx.doi.org/10.1021/acsami.7b10264DOI Listing
November 2017

Metal Selenides as Efficient Counter Electrodes for Dye-Sensitized Solar Cells.

Acc Chem Res 2017 04 10;50(4):895-904. Epub 2017 Mar 10.

Department of Chemistry, Lab of Advanced Materials, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Fudan University , 2205 Songhu Road, Shanghai 200438, P. R. China.

Solar energy is the most abundant renewable energy available to the earth and can meet the energy needs of humankind, but efficient conversion of solar energy to electricity is an urgent issue of scientific research. As the third-generation photovoltaic technology, dye-sensitized solar cells (DSSCs) have gained great attention since the landmark efficiency of ∼7% reported by O'Regan and Grätzel. The most attractive features of DSSCs include low cost, simple manufacturing processes, medium-purity materials, and theoretically high power conversion efficiencies. As one of the key materials in DSSCs, the counter electrode (CE) plays a crucial role in completing the electric circuit by catalyzing the reduction of the oxidized state to the reduced state for a redox couple (e.g., I/I) in the electrolyte at the CE-electrolyte interface. To lower the cost caused by the typically used Pt CE, which restricts the large-scale application because of its low reserves and high price, great effort has been made to develop new CE materials alternative to Pt. A lot of Pt-free electrocatalysts, such as carbon materials, inorganic compounds, conductive polymers, and their composites with good electrocatalytic activity, have been applied as CEs in DSSCs in the past years. Metal selenides have been widely used as electrocatalysts for the oxygen reduction reaction and light-harvesting materials for solar cells. Our group first expanded their applications to the DSSC field by using in situ-grown CoSe nanosheet and NiSe nanoparticle films as CEs. This finding has inspired extensive studies on developing new metal selenides in order to seek more efficient CE materials for low-cost DSSCs, and a lot of meaningful results have been achieved in the past years. In this Account, we summarize recent advances in binary and mutinary metal selenides applied as CEs in DSSCs. The synthetic methods for metal selenides with various morphologies and stoichiometric ratios and deposition methods for CE films are described. We emphasize that the in situ growth method exhibits advantages over other methods for fabricating stable and efficient CEs. We focus on the effect of morphology on the electocatalytic and photovoltaic performance. Application of transparent metal selenide CEs in bifacial DSSCs and the superiority of in situ-grown metal selenide nanosheet fiber CEs used for fiber DSSCs are presented. In addition, we show that metal selenides with a hollow sphere structure can function not only as an efficient electrocatalyst but also as a light-scattering layer. Finally, we present our views on the current challenges and future development of metal selenide CE materials.
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http://dx.doi.org/10.1021/acs.accounts.6b00625DOI Listing
April 2017

Hierarchical Structural Evolution of ZnGeO in Binary Solvent and Its Effect on Li-ion Storage Performance.

ACS Appl Mater Interfaces 2017 Mar 8;9(11):9778-9784. Epub 2017 Mar 8.

Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for Synthesis and Applications of Organic Functional Molecules, Hubei University , Wuhan 430062, China.

Zinc germinate (ZnGeO) with a hierarchical structure was successfully synthesized in a binary ethylenediamine/water (En/HO) solvent system by wet chemistry methods. The morphological evolution process of the ZnGeO was investigated in detail by tuning the ratio of En to HO in different solvent systems, and a series of compounds with awl-shaped, fascicular, and cross-linked hierarchical structures was obtained and employed as anode materials in lithium-ion batteries. The materials with fascicular structure exhibited excellent electrochemical performance, and a specific reversible capacity of 1034 mA h g was retained at a current density of 0.5 A g after 160 cycles. In addition, the as-prepared nanostructured electrode also delivered impressive rate capability of 315 mA h g at the current density of 10 A g. The remarkable electrochemical performances could be ascribed to the following aspects. First, each unit in the three-dimensional fascicular structure can effectively buffer the volume expansions during the Li extraction/insertion process, accommodate the strain induced by the volume variation, and stabilize its whole configuration. Meanwhile, the small fascicular units can enlarge the electrode/electrolyte contact area and form an integrated interlaced conductive network which provides continuous electron/ion pathways.
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http://dx.doi.org/10.1021/acsami.7b00582DOI Listing
March 2017

Hydrothermal Synthesis and Electrochemical Performance of Manganese Oxide (Na-OMS-2) Nanorods.

J Nanosci Nanotechnol 2017 Feb;17(2):1470-475

Sodium octahedral molecular sieve nanorods (Na-OMS-2) were prepared through a facile hydrothermal method. The effects of reaction temperature and duration on particle sizes of the products were investigated. The electrochemical performance of samples was studied by constant current charge–discharge tests as cathode material for Li-ion batteries (LIBs). The initial discharge capacity of Na-OMS-2 is 123.4 mAh g−1 and the capacity retention was 123.9 mAh g−1 after 100 cycles. The result demonstrates that Na-OMS-2 cathode material behaves a good cycling stability.
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http://dx.doi.org/10.1166/jnn.2017.12604DOI Listing
February 2017

Synthesis and Electrochemical Properties of Nano-VO2 (B).

J Nanosci Nanotechnol 2016 Mar;16(3):2534-40

The nano-VO2 (B) has been self-assembly synthesized by hydrothermal method using different templates, which may give them some interesting properties. The as-prepared samples were characterized by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). The electrochemical properties of the samples were investigated. The results show that the hexadecyltrimethyl ammonium bromide (CTAB) (soft template) was used to obtain the VO2 (B1) nanobelts. The flake graphite (hard template) was taken to get the VO2 (B2) nanosheets. The VO2 (B1) nanobelts have higher initial capacity to compare with VO2 (B2). But the VO2 (B2) nanosheets showed better cycling performance than that of VO2 (B1) nanobelts. The nano VO2 (B2) is a promising anode material for lithium ion battery application.
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http://dx.doi.org/10.1166/jnn.2016.10777DOI Listing
March 2016

Facile Synthesis of Porous Mn₂O₃ Microspheres as Anode Materials for Lithium Ion Batteries.

J Nanosci Nanotechnol 2016 Jan;16(1):698-703

Porous Mn₂O₃ microspheres with a diameter of 0.5-2 µm were synthesized by a thermal decomposition of MnCO₃ micospheres precursor. The effects of annealing time on the morphologies and electrochemical properties of the final products were systematically investigated. The porous Mn2O₃ microspheres prepared at 600 °C for 4 h exhibit the best electrochemical properties with a high reversible capability (925 mAh/g at current density of 100 mA/g) and cycling stability. It still retains a high capacity of 565 mAh/g, even after 100 cycles, as anode materials for lithium-ion batteries. The good electrochemical performance for the porous Mn₂O₃microspheres can be attributed to its high surface area and mesoporous structure.
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http://dx.doi.org/10.1166/jnn.2016.10619DOI Listing
January 2016

Synthesis and Electrochemical Properties of LiFePO4/C for Lithium Ion Batteries.

J Nanosci Nanotechnol 2015 Mar;15(3):2253-7

LiFePO4/C was prepared through a facile rheological phase reaction method by using Fe3(PO4)2, Li3PO4 · 8H2O, and glucose as reactants. The LiFePO4/C samples were characterized by X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis. The electrochemical properties of the samples were investigated. The results show that the LiFePO4/C samples have single-phase olivine-type structure, and their particles feature a spherical shape. The carbon coating on the particles of LiFePO4 is about 1.8% of the LiFePO4/C by weight. The particle size was distributed from 0.2 to 1 µm. The initial discharge capacity of LiFePO4/C reached 154 mA h/g at 0.1 C. The retained discharge capacity of LiFePO4/C was 152.9 mA h g(-1) after 50 cycles. The LiFePO4/C also showed better cycling performance than that of the bare LiPeO4 at a higher charge/discharge rate (1 C). The LIFePO4/C prepared in this way could be a promising cathode material for lithium ion battery application.
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http://dx.doi.org/10.1166/jnn.2014.9883DOI Listing
March 2015

Unique Urchin-like Ca2Ge7O16 Hierarchical Hollow Microspheres as Anode Material for the Lithium Ion Battery.

Sci Rep 2015 Jun 10;5:11326. Epub 2015 Jun 10.

1] Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China [2] Institute for Superconducting and Electronic Materials, School of Mechanical, Materials and Mechatronics Engineering, University of Wollongong, North Wollongong, NSW 2500, Australia.

Germanium is an outstanding anode material in terms of electrochemical performance, especially rate capability, but its developments are hindered by its high price because it is rare in the crust of earth, and its huge volume variation during the lithium insertion and extraction. Introducing other cheaper elements into the germanium-based material is an efficient way to dilute the high price, but normally sacrifice its electrochemical performance. By the combination of nanostructure design and cheap element (calcium) introduction, urchin-like Ca2Ge7O16 hierarchical hollow microspheres have been successfully developed in order to reduce the price and maintain the good electrochemical properties of germanium-based material. The electrochemical test results in different electrolytes show that ethylene carbonate/dimethyl carbonate/diethyl carbonate (3/4/3 by volume) with 5 wt% fluoroethylene carbonate additive is the most suitable solvent for the electrolyte. From the electrochemical evaluation, the as-synthesized Ca2Ge7O16 hollow microspheres exhibit high reversible specific capacity of up to 804.6 mA h g(-1) at a current density of 100 mA g(-1) after 100 cycles and remarkable rate capability of 341.3 mA h g(-1) at a current density of 4 A g(-1). The growth mechanism is proposed based on our experimental results on the growth process.
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http://dx.doi.org/10.1038/srep11326DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4462153PMC
June 2015

Synthesis and electrochemical properties of spinel LiMn1.95M(x)O(4-y)F(y) for lithium ion batteries.

J Nanosci Nanotechnol 2014 Jul;14(7):5124-9

Spinel phase LiMn1.95M(x)O(4-y)F(y) (M = Co and Y) were prepared by a rheological phase reaction method. The samples were characterized by X-ray diffraction, scanning electron microscopy, AC impedance, and galvanostatic charge/discharge profile measurement. These results showed that the LiMn1.95M(x)O(4-y)F(y) had better cycling performance than pure LiMn2O4. Among all the doped samples, the LiMn1.95Co0.03Y0.02O3.96F0.04 sample showed the best cycling performance, the initial discharge capacitiy is 129 mAh/g, and the discharge capacity of 124 mAh/g at a rate of 0.5 C after 50 cycles. The loss of its capacity was only 3.4%. The possible reasons for the outstanding electrochemical properties of LiMn1.95Co0.03Y0.02O3.96F0.04 are also discussed.
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http://dx.doi.org/10.1166/jnn.2014.8675DOI Listing
July 2014

Synthesis and electrochemical properties of SnWO4.

J Nanosci Nanotechnol 2014 Mar;14(3):2395-9

In this paper, a pure SnWO4 was synthesized by solvothermal method. The glucose as a carbon sources was mixed with SnWO4 to prepared SnWO4/C composite. The structure and morphology were characterized by XRD and SEM techniques. The electrochemical properties of SnWO4 and SnWO4/C composite were studied by battery comprehensive testing system and AC impedance spectroscopy. The results showed that the alpha-SnWO4 phase was formed and its particles were ranged from 50 to 250 nm. The alpha-SnWO4/C composites behaved higher reversible discharge capacity and better cycle performance than that of alpha-SnWO4. The reversible discharge capacity of SnWO4/C composites was 780 mA h/g at the current density (50 mA/g) and it could keep at 600 mA h/g after 30 cycles. The reason for SnWO4/C composite to behave outstanding electrochemical properties was discussed also.
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http://dx.doi.org/10.1166/jnn.2014.8497DOI Listing
March 2014