3,555 results match your criteria carbon stabilization

Corannulene: A Curved Polyarene Building Block for the Construction of Functional Materials.

Acc Chem Res 2021 Jun 11. Epub 2021 Jun 11.

Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21-Nanyang Link, 637371 Singapore.

ConspectusThis Account describes a body of research in the design and synthesis of molecular materials prepared from corannulene. Corannulene (CH) is a molecular bowl of carbon that can be visualized as the hydrogen-terminated cap of buckminsterfullerene. Due to this structural resemblance, it is often referred to as a buckybowl. Read More

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Properties of humic acids depending on the land use in different parts of Slovakia.

Environ Sci Pollut Res Int 2021 Jun 8. Epub 2021 Jun 8.

Department of Soil Science, Slovak University of Agriculture in Nitra, 2 Tr. A. Hlinku St, 94976, Nitra, Slovakia.

Many studies report organic carbon stabilization by clay minerals, but the effects of land use and soil type on the properties of humic acids (HAs) are missing. The aim of the paper is to determine the effects of land use and soil types on the characteristics of HAs, which have a considerable influence on organic matter quality. It was hypothesised that the effect of the land use on HAs properties depends on the particular size distribution. Read More

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Can combined compost and biochar application improve the quality of a highly weathered coastal savanna soil?

Heliyon 2021 May 21;7(5):e07089. Epub 2021 May 21.

Department of Soil Science and Soil Ecology, Institute of Geography, Ruhr University, Bochum, Germany.

Soil fertility decline is a major constraint to crop production in sub-Saharan Africa. The positive effect of biochar and compost applications on soil fertility has been reported by many authors. In this study, a 30-day laboratory incubation experiment was done using 120 g samples each of a Haplic acrisol amended with corn cob biochar (cbio), rice husk biochar (rbio), coconut husk biochar (coco300 and coco700) or poultry manure compost (compost); and co- composted rice husk biochar (rcocomp) or co-composted corn cob biochar (cococomp) at rates of 1 % w/w amendment: soil, respectively. Read More

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High blocking temperatures for DyScS endohedral fullerene single-molecule magnets.

Chem Sci 2020 Nov 2;11(48):13129-13136. Epub 2020 Nov 2.

Department of Chemistry, University of Texas at El Paso 500 W University Avenue El Paso Texas 79968 USA

Dy-based single-molecule magnets (SMMs) are of great interest due to their ability to exhibit very large thermal barriers to relaxation and therefore high blocking temperatures. One interesting line of investigation is Dy-encapsulating endohedral clusterfullerenes, in which a carbon cage protects magnetic Dy ions against decoherence by environmental noise and allows for the stabilization of bonding and magnetic interactions that would be difficult to achieve in other molecular architectures. Recent studies of such materials have focused on clusters with two Dy atoms, since ferromagnetic exchange between Dy atoms is known to reduce the rate of magnetic relaxation quantum tunneling. Read More

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November 2020

Carbonization of single polyacrylonitrile chains in coordination nanospaces.

Chem Sci 2020 Jun 5;11(39):10844-10849. Epub 2020 Jun 5.

Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo 5-1-5 Kashiwanoha, Kashiwa Chiba 277-8561 Japan

It has been over half a century since polyacrylonitrile (PAN)-based carbon fibers were first developed. However, the mechanism of the carbonization reaction remains largely unknown. Structural evolution of PAN during the preoxidation reaction, a stabilization reaction, is one of the most complicated stages because many chemical reactions, including cyclization, dehydration, and cross-linking reactions, simultaneously take place. Read More

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3D tremella-like nitrogen-doped carbon encapsulated few-layer MoS for lithium-ion batteries.

J Colloid Interface Sci 2021 May 27;601:594-603. Epub 2021 May 27.

Key Laboratory of Superlight Materials and Surface Technology (Ministry of Education), College Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, People's Republic of China. Electronic address:

MoS is regarded as an attractive anode material for lithium-ion batteries due to its layered structure and high theoretical specific capacity. Its unsatisfied conductivity and the considerable volume change during the charge and discharge process, however, limits its rate performance and cycling stability. Herein, 3D tremella-like nitrogen-doped carbon encapsulated few-layer MoS ([email protected]) hybrid is obtained via a unique strategy with simultaneously poly-dopamine carbonization, and molybdenum oxide specifies sulfurization. Read More

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Effects of sheep bone biochar on soil quality, maize growth, and fractionation and phytoavailability of Cd and Zn in a mining-contaminated soil.

Chemosphere 2021 May 28;282:131016. Epub 2021 May 28.

College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, China. Electronic address:

Biochar prepared from various feedstock materials has been utilized in recent years as a potential stabilizing agent for heavy metals in smelter-contaminated soils. However, the effectiveness of animal bone-derived biochar and its potential for the stabilization of contaminants remains unclear. In the present study, sheep bone-derived biochar (SB) was prepared at low (500 °C; SBL) and high temperatures (800 °C; SBH) and amended a smelter-contaminated soil at 2, 5, and 10% (w/w). Read More

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An AlCl coordinating interlayer spacing in microcrystalline graphite facilitates ultra-stable and high-performance sodium storage.

Nanoscale 2021 Jun;13(23):10468-10477

Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China.

Metal chloride-intercalated graphite intercalation compounds (MC-GICs) show a perfect sandwich structure with high electronic conductivity and chemical stability, but there are few applications for MC-GICs in anode materials of sodium ion batteries (SIBs). Herein, we selected a splendid host microcrystalline graphite (MG) to synthesize an AlCl3 intercalated MG intercalation compound (AlCl3-MGIC) anode material and demonstrated that it is suitable for SIBs via electrolyte optimization. The AlCl3-MGIC electrode is primarily compared in four electrolytes. Read More

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Recycling Blast Furnace Ferronickel Slag as a Replacement for Paste in Mortar: Formation of Carboaluminate, Reduction of White Portland Cement, and Increase in Strength.

Materials (Basel) 2021 May 20;14(10). Epub 2021 May 20.

China Road and Bridge Co., Beijing 100011, China.

Blast furnace ferronickel slag (BFFS) is generated in the production of ferronickel alloys and is used as cement replacement in concrete or mortar. The effectivity in reducing cement consumption and improving performance are limited. By referring to the paste replacement method, this work used BFFS to replace an equal volume of the white Portland cement paste to obtain greater performance enhancement. Read More

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The impact of hydraulic retention time on the performance of two configurations of anaerobic pond for municipal sewage treatment.

Environ Technol 2021 May 31:1-40. Epub 2021 May 31.

Cranfield Water Science Institute, Cranfield University, Cranfield, Bedfordshire, UK, MK43 0AL.

Anaerobic ponds have the potential to contribute to low carbon wastewater treatment, however are currently restricted by long hydraulic residence time (HRT) which leads to large land requirements. A two stage anaerobic pond (SAP) design was trialled against a single stage control (CAP) over four HRTs down to 0.5 days, to determine the lowest HRT at which the ponds could operate effectively. Read More

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Effects of Different Biochars, Activated Carbons and Redmuds on the Growth of Trifolium repens and As and Pb Stabilization in a Former Mine Technosol.

Bull Environ Contam Toxicol 2021 May 26. Epub 2021 May 26.

INRA USC1328, LBLGC EA1207, University of Orléans, Orléans, France.

Soil pollution by metal(loid)s is an important issue in Europe, as it causes environmental and health problems. Therefore, remediation of these areas is needed. The success of phytoremediation process will depend on the ability of plants to implement, which can require the addition of amendments to the soil in order to improve soil conditions, immobilize pollutant and thus ameliorate plant growth. Read More

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Green synthesis of multifunctional carbon coated copper oxide nanosheets and their photocatalytic and antibacterial activities.

Sci Rep 2021 May 24;11(1):10781. Epub 2021 May 24.

Biology Department, Faculty of Science, Tabuk University, Tabuk, Saudi Arabia.

The studies of metal oxides in environmental remediation of chemical and biological pollutants are gaining colossal importance. Herein, we report the facile synthesis of multifunctional copper oxide nanosheets (CuO NS) using an aqueous extract of Rhazya stricta. The phytochemical investigation of R. Read More

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Gold-silver nanoparticles modified electrochemical sensor array for simultaneous determination of chromium(III) and chromium(VI) in wastewater samples.

Chemosphere 2021 May 15;281:130880. Epub 2021 May 15.

Residues and Resource Reclamation Centre (R3C), Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Clean Tech One, 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore. Electronic address:

The oxidation state of ions is a crucial aspect that often has been overlooked when determining the toxicity of chromium (Cr) species in environmental samples. In this study, a novel electrochemical sensor array based on gold-silver nanoparticles modified electrodes was developed for simultaneous determination of the two main chromium species (Cr(III) and (VI)). Specifically, the working electrodes of screen-printed carbon electrodes (SPCEs) were modified with silver-gold bimetallic nanoparticles through electrochemical deposition for detection of Cr(VI). Read More

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Reversing the Irreversible: Thermodynamic Stabilization of LiAlH Nanoconfined Within a Nitrogen-Doped Carbon Host.

ACS Nano 2021 May 24. Epub 2021 May 24.

Sandia National Laboratories, 7011 East Avenue, Livermore, California 94550, United States.

A general problem when designing functional nanomaterials for energy storage is the lack of control over the stability and reactivity of metastable phases. Using the high-capacity hydrogen storage candidate LiAlH as an exemplar, we demonstrate an alternative approach to the thermodynamic stabilization of metastable metal hydrides by coordination to nitrogen binding sites within the nanopores of N-doped CMK-3 carbon (NCMK-3). The resulting [email protected] material releases H at temperatures as low as 126 °C with full decomposition below 240 °C, bypassing the usual LiAlH intermediate observed in bulk. Read More

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Development of sonophotocatalytic process for degradation of acid orange 7 dye by using titanium dioxide nanoparticles/graphene oxide nanocomposite as a catalyst.

J Environ Manage 2021 Aug 20;292:112777. Epub 2021 May 20.

Department of Environmental Health, Health Promotion Research Center, Zahedan University of Medical Sciences, Zahedan, Iran. Electronic address:

In the present study, the sonophotocatalytic degradation of acid orange 7 (AO7) dye was evaluated. The catalyst used was the titanium dioxide nanoparticles/graphene oxide (TiO/GO) nanocomposite, which was synthesized using the Hummers and Hoffman's method and the liquid phase deposition method. TiO/GO nanocomposite was characterized through the analyses of transmission electron microscopy (TEM), X-ray diffraction (XRD), Energy Dispersive X-ray (EDX) spectroscopy, Raman spectroscopy, and Fourier transform infrared (FTIR) spectroscopy. Read More

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Greenhouse gas emissions from riparian zones are related to vegetation type and environmental factors.

J Environ Qual 2021 May 21. Epub 2021 May 21.

School of Environment, Resources and Sustainability, Univ. of Waterloo, Ontario, N2L 3G1, Canada.

Riparian zones provide multiple benefits, including streambank stabilization and nutrient abatement. However, there is a knowledge gap on how the type of vegetation and environmental factors (e.g. Read More

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Capturing the Missing Carbon Cage Isomer of C via Mutual Stabilization of a Triangular Monometallic Cyanide Cluster.

J Am Chem Soc 2021 Jun 19;143(21):8078-8085. Epub 2021 May 19.

Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Materials for Energy Conversion, Anhui Laboratory of Advanced Photon Science and Technology, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China.

Monometallic cyanide clusterfullerenes (CYCFs) represent a unique branch of endohedral clusterfullerenes with merely one metal atom encapsulated, offering a model system for elucidating structure-property correlation, while up to now only C and C cages have been isolated for the pristine CYCFs. C is one of the most abundant fullerenes and has 24 isomers obeying the isolated pentagon rule (IPR), among which 14 isomers have been already isolated, whereas the (17)-C isomer has lower relative energy than several isolated isomers but never been found for empty and endohedral fullerenes. Herein, four novel C-based pristine CYCFs with variable encapsulated metals and isomeric cages, including [email protected](13)-C (M = Y, Dy, Tb) and [email protected](17)-C, have been synthesized and isolated, fulfilling the first identification of the missing (17)-C isomer, which can be interconverted from the (13)-C isomer through two steps of Stone-Wales transformation. Read More

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Timescales of the permafrost carbon cycle and legacy effects of temperature overshoot scenarios.

Nat Commun 2021 05 11;12(1):2688. Epub 2021 May 11.

Max Planck Institute for Meteorology, The Land in the Earth System, Hamburg, Germany.

Minimizing the risks and impacts of climate change requires limiting the global temperature increase to 1.5 °C above preindustrial levels, while the difficulty of reducing carbon emissions at the necessary rate increases the likelihood of temporarily overshooting this climate target. Using simulations with the land surface model JSBACH, we show that it takes high-latitude ecosystems and the state of permafrost-affected soils several centuries to adjust to the atmospheric conditions that arise at the 1. Read More

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Carboxylic acid reduction and sulfate-reducing bacteria stabilization combined remediation of Cr (VI)-contaminated soil.

Ecotoxicol Environ Saf 2021 May 8;218:112263. Epub 2021 May 8.

Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address:

For controlling heavy metal pollution, the utilization of carboxylic acids (CAs) combined with sulfate-reducing bacteria (SRB) for continuous and stable remediation of Cr (VI)-contaminated soil was comprehensively investigated. At pH 3, citrate and lactate had photocatalysis characteristics that enabled them to reduce high Cr (VI) concentrations. The reduction efficiencies of citrate and lactate were 99. Read More

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Composting of swine production chain wastes with addition of crude glycerin: organic matter degradation kinetics, functional groups, and carboxylic acids.

Environ Sci Pollut Res Int 2021 May 7. Epub 2021 May 7.

Program of Postgraduate in Biotechnology, Federal University of Paraná, Street Pioneiro, 2153, CEP: 85.950-000, Bairro Jardim Dallas, Palotina, PR, Brazil.

Little is known about the effect of adding crude glycerin (CG) as a carbon source during the composting of agro-industrial residues, such as those generated in the swine production chain, especially concerning the impact on organic matter humification. Therefore, the aim of this work was to study the effect of adding crude glycerin during the composting of organic swine waste, using appropriate analyses to determine the degree of maturation of the organic material. The experiment was performed using composters constructed from pallets. Read More

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How do boreal forest soils store carbon?

Bartosz Adamczyk

Bioessays 2021 Jul 6;43(7):e2100010. Epub 2021 May 6.

Natural Resources Institute Finland, Helsinki, Finland.

Boreal forests store a globally significant pool of carbon (C), mainly in tree biomass and soil organic matter (SOM). Although crucial for future climate change predictions, the mechanisms underlying C stabilization are not well understood. Here, recently discovered mechanisms behind SOM stabilization, their level of understanding, interrelations, and future directions in the field are provided. Read More

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Linear Free Energy Relationships for Enzymatic Reactions: Fresh Insight from a Venerable Probe.

Acc Chem Res 2021 05 3;54(10):2532-2542. Epub 2021 May 3.

Department of Chemistry, University at Buffalo, SUNY, Buffalo, New York 14260-3000, United States.

Linear free energy relationships (LFERs) for substituent effects on reactions that proceed through similar transition states provide insight into transition state structures. A classical approach to the analysis of LFERs showed that differences in the slopes of Brønsted correlations for addition of substituted alkyl alcohols to ring-substituted 1-phenylethyl carbocations and to the β-galactopyranosyl carbocation intermediate of reactions catalyzed by β-galactosidase provide evidence that the enzyme catalyst modifies the curvature of the energy surface at the saddle point for the transition state for nucleophile addition. We have worked to generalize the use of LFERs in the determination of enzyme mechanisms. Read More

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Biogas Conversion to Syngas Using Advanced Ni-Promoted Pyrochlore Catalysts: Effect of the CH/CO Ratio.

Front Chem 2021 14;9:672419. Epub 2021 Apr 14.

Department of Chemical and Process Engineering, University of Surrey, Guildford, United Kingdom.

Biogas is defined as the mixture of CH and CO produced by the anaerobic digestion of biomass. This particular mixture can be transformed in high valuable intermediates such as syngas through a process known as dry reforming (DRM). The reaction involved is highly endothermic, and catalysts capable to endure carbon deposition and metal particle sintering are required. Read More

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Arylpentazoles with surprisingly high kinetic stability.

Chem Commun (Camb) 2021 May;57(43):5310-5313

Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, P. R. China and Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, P. R. China.

The more-than-one-century-old arylpentazoles can only be used in situ in generating the pentazole anion due to their unfavourable kinetic stability. We successfully increased the N2-leaving barrier to reach hitherto the highest value of 40.83 kcal mol-1 at the CBS-QB3 level via a newly proposed co-stabilization method, making the broader applications of arylpentazoles feasible. Read More

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Fabrication of Carbon Nanomaterials Using Laser Scribing on Copper Nanoparticles-Embedded Polyacrylonitrile Films and Their Application in a Gas Sensor.

Polymers (Basel) 2021 Apr 28;13(9). Epub 2021 Apr 28.

Department of Physics and Graphene Research Institute, Sejong University, Seoul 05006, Korea.

Carbon nanomaterials have attracted significant research attention as core materials in various industrial sectors owing to their excellent physicochemical properties. However, because the preparation of carbon materials is generally accompanied by high-temperature heat treatment, it has disadvantages in terms of cost and process. In this study, highly sensitive carbon nanomaterials were synthesized using a local laser scribing method from a copper-embedded polyacrylonitrile (CuPAN) composite film with a short processing time and low cost. Read More

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Preparation and Characterization of Carbon Fibers from Lyocell Precursors Grafted with Polyacrylamide via Electron-Beam Irradiation.

Molecules 2021 Apr 23;26(9). Epub 2021 Apr 23.

Institute of Carbon Technology, Jeonju University, 303 Cheonjam-ro, Wansan-gu, Jeonju-si 55069, Jeollabuk-do, Korea.

Carbon fibers, which act as reinforcements in many applications, are often obtained from polyacrylonitrile (PAN). However, their production is expensive and results in waste problems. Therefore, we focused on producing carbon fibers from lyocell, a cellulose-based material, and analyzed the effects of the process parameters on their mechanical properties and carbon yields. Read More

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The Effect of Granular Activated Carbon and Biochar on the Availability of Cu and Zn to Distichum in Contaminated Soil.

Plants (Basel) 2021 Apr 22;10(5). Epub 2021 Apr 22.

Faculty of Natural Sciences, Tula State Lev Tolstoy Pedagogical University, Lenin Ave. 125, 300041 Tula, Russia.

The presence of heavy metals in the soil could impose serious problems on soil-plant systems due to the accumulation of heavy metals in plants. Even vital elements such as Cu and Zn have a toxic effect in the case of excessive intake by living organisms. The present work aimed to investigate the content of loosely bound (exchangeable, complexed, and specifically sorbed) compounds of Cu and Zn and their availability to spring barley ( distichum) in contaminated Haplic Chernozem soil under the conditions of a model experiment (five approximate permissible concentrations (APC) and 10 APC of metal). Read More

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The Surgical Treatment of Pyogenic Spondylodiscitis using Carbon-Fiber-Reinforced Polyether Ether Ketone Implants: Personal Experience of a Series of 81 Consecutive Patients.

World Neurosurg 2021 Apr 24. Epub 2021 Apr 24.

Department of Neurosurgery, Saarland University Medical Center and Saarland University Faculty of Medicine, Homburg-Saar, Germany.

Background: Pyogenic spondylodiscitis (PSD) is a complex disorder that often required postoperative imaging. Carbon-fiber-reinforced polyether ether ketone (CFRP) is radiolucent and offers an optimal assessability of anatomic structures.

Methods: A retrospective file review of patients who were operated on for PSD using CFRP implants was performed to assess the clinical outcome, implant-associated complications, and revision surgery. Read More

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60 years of fertilization and liming impacts on soil organic carbon stabilization in a sub-tropical Alfisol.

Environ Sci Pollut Res Int 2021 Apr 21. Epub 2021 Apr 21.

Environmental Sciences and Biomedical Metrology Division, CSIR-National Physical Laboratory, New Delhi, 110012, India.

Limited information is available on the C stabilization mechanism of tropical soils under different management practices including long-term organic manuring, mineral fertilization alone, or in combination with lime. Hence, to understand the effect of continuous application (for 60 years) of organic manure, fertilizer, and lime alone or in combination on an acidic Alfisol, stabilization of soil organic carbon (SOC) was evaluated under maize (Zea mays L.) wheat (Triticum aestivum L. Read More

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