20,552 results match your criteria oxide gel


Effects of TiO structure and Co addition as a second metal on Ru-based catalysts supported on TiO for selective hydrogenation of furfural to FA.

Sci Rep 2021 May 7;11(1):9786. Epub 2021 May 7.

Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand.

The TiO supported Ru-based catalysts were prepared with 1.5 wt% Ru and 0-0.8 wt% Co on various TiO (anatase, rutile, P-25, and sol-gel TiO) and studied in the liquid-phase selective hydrogenation of furfural to furfuryl alcohol (FA) under mild conditions (50 °C and 2 MPa H). Read More

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Binary Solvent Systems for Piezoelectric Printing Crack-Free PAM/ZrO Hybrid Thin Films through Nanostructure Modulation.

Langmuir 2021 May 7. Epub 2021 May 7.

Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China.

Polymer/oxide hybrid thin films, which have excellent electrical and mechanical performance, can be effectively fabricated through the sol-gel process, showing great potential in the future printed electronics. However, gelation of polymer/oxide ink systems can easily occur during a thermal process in which case capillary stress can lead to the crack of printed films due to the long period of stress accumulation. To solve this problem, the effect of different solvent systems on formed PAM/ZrO hybrid films, which were printed by piezoelectric printing, was studied in this paper, including single solvent systems of glycol and binary solvent systems of glycol and water. Read More

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Sb/Pd co-doped SnO2 nanoparticles for methane detection: resistance reduction and sensing performance studies.

Nanotechnology 2021 May 6. Epub 2021 May 6.

State Key Laboratory of Integrated Optoelectronics, Jilin University, Qianwei Campus, 2699 Qianjin Street, Changchun 130012, PEOPLE'S REPUBLIC OF CHINA,, changchun, CHINA.

Methane (CH4) gas sensors play an important role in industrial safety and detection of indoor gas quality. In general, metal oxide semiconductor sensing materials with nano-structure have high responses to the target gas. However, the sensor resistance is usually very high. Read More

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Indium Tin Oxide Branched Nanowire and Poly(3-hexylthiophene) Hybrid Structure for a Photorechargeable Supercapacitor.

ACS Appl Mater Interfaces 2021 May 6. Epub 2021 May 6.

Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Korea.

We report a photorechargeable supercapacitor that can convert solar energy to chemical energy and store it. The supercapacitor is composed of indium tin oxide branched nanowires (ITO BRs) and poly(3-hexylthiophene) (P3HT) semiconducting polymers. ITO BRs showed electrical double layer capacitive characteristics that originated from the unique porous and self-connected network structure. Read More

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Enhanced Electroactivity, Mechanical Properties, and Printability through the Addition of Graphene Oxide to Photo-Cross-linkable Gelatin Methacryloyl Hydrogel.

ACS Biomater Sci Eng 2021 May 6. Epub 2021 May 6.

ARC Centre of Excellence for Electromaterials Science, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Melbourne, Victoria 3122, Australia.

The human tissues most sensitive to electrical activity such as neural and muscle tissues are relatively soft, and yet traditional conductive materials used to interface with them are typically stiffer by many orders of magnitude. Overcoming this mismatch, by creating both very soft and electroactive materials, is a major challenge in bioelectronics and biomaterials science. One strategy is to imbue soft materials, such as hydrogels, with electroactive properties by adding small amounts of highly conductive nanomaterials. Read More

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Enhanced visible light-driven photocatalysis of iron-oxide/titania composite: Norfloxacin degradation mechanism and toxicity study.

J Hazard Mater 2021 Jun 6;412:125330. Epub 2021 Feb 6.

Division of Biotechnology, Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Jeonbuk National University, Iksan, Jeonbuk 54596, South Korea. Electronic address:

A simulated visible light-mediated iron oxide-titania (IoT) nanocomposite was employed to degrade the antibiotic norfloxacin (NFN) photocatalytically. The photocatalyst were prepared using a sol-gel method with controlled titania loadings to iron oxide by altering the fabrications step. The nanocomposites were structurally characterized by field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), field emission high-resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, Diffuse reflectance UV-visible spectra (DRS-UV) spectroscopy, cyclic voltammetry, and X-ray photoelectron spectroscopy (XPS). Read More

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Synthesis of Resveratrol Loaded Hybrid Silica-PAMAM Dendrimer Nanoparticles With Emphases on Inducible Nitric Oxide Synthase and Cytotoxicity.

Plant Foods Hum Nutr 2021 May 5. Epub 2021 May 5.

Department of Bioengineering, Faculty of Engineering, Ege University, 35100, Izmir, Turkey.

Resveratrol is a naturally occurring polyphenolic compound exhibiting therapeutic activities. However, the stability can be altered by UV light, pH and changes in temperature. Encapsulation would be an ideal strategy to improve the stability and bioavailability. Read More

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-MagnetoMethyl IP: a magnetic nanoparticle-mediated immunoprecipitation and electrochemical detection method for global DNA methylation.

Analyst 2021 May 5. Epub 2021 May 5.

Queensland Micro- and Nanotechnology Centre (QMNC), Griffith University, Nathan Campus, QLD 4111, Australia. and School of Environment and Science (ESC), Griffith University, Nathan Campus, QLD 4111, Australia.

The quantification of global 5-methylcytosine (5mC) content has emerged as a promising approach for the diagnosis and prognosis of cancers. However, conventional methods for the global 5mC analysis require large quantities of DNA and may not be useful for liquid biopsy applications, where the amount of DNA available is limited. Herein, we report magnetic nanoparticles-assisted methylated DNA immunoprecipitation (e-MagnetoMethyl IP) coupled with electrochemical quantification of global DNA methylation. Read More

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Nano Carbon Doped Polyacrylamide Gel Electrolytes for High Performance Supercapacitors.

Molecules 2021 Apr 30;26(9). Epub 2021 Apr 30.

Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ 07102, USA.

Novel polyacrylamide gel electrolytes (PGEs) doped with nano carbons with enhanced electrochemical, thermal, and mechanical properties are presented. Carboxylated carbon nanotubes (fCNTs), graphene oxide sheets (GO), and the hybrid of fCNT/GO were embedded in the PGEs to serve as supercapacitor (SC) electrolytes. Thermal stability of the unmodified PGE increased with the addition of the nano carbons which led to lower capacitance degradation and longer cycling life of the SCs. Read More

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Evolution of the Local Structure in the Sol-Gel Synthesis of FeC Nanostructures.

Inorg Chem 2021 May 4. Epub 2021 May 4.

School of Chemistry, University of Birmingham, Birmingham B152TT, U.K.

The sol-gel synthesis of iron carbide (FeC) nanoparticles proceeds through multiple intermediate crystalline phases, including iron oxide (FeO) and iron nitride (FeN). The control of particle size is challenging, and most methods produce polydisperse FeC nanoparticles of 20-100 nm in diameter. Given the wide range of applications of FeC nanoparticles, it is essential that we understand the evolution of the system during the synthesis. Read More

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Effect of two desensitizing agents applied previous to in-office bleaching on the degree of whitening and dentin sensitivity: A randomized, controlled, double-blind clinical trial.

Am J Dent 2021 Apr;34(2):70-74

Department of Restorative Dentistry , School of Dentistry, State University of Western Paraná, Cascavel, Paraná, Brazil,

Purpose: To evaluate the effect of two desensitizing agents applied before in-office bleaching, on the degree of whitening and dentin sensitivity.

Methods: Participants were randomly assigned to the groups, according to the desensitizing agent used, with n=10 for each one. The bleaching was performed with 35% hydrogen peroxide, divided according to the desensitizing agent used prior to the bleaching procedure: Placebo (PL); Desensibilize KF with potassium nitrate and 0. Read More

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Augmenting the electrochemical performance of NiMnO by doping of transition metal ions and compositing with rGO.

J Colloid Interface Sci 2021 Apr 8;598:409-418. Epub 2021 Apr 8.

Electrochemical Power Sources (ECPS) Division, CSIR-Central Electrochemical Research Institute, Karaikudi 630003, Tamilnadu, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India. Electronic address:

The transition metal ions (TMIs) such as Co and Zn doped NiMnO (NMO)/rGO nanocomposite synthesized by facile sol-gel method was used for the fabrication of supercapacitor. The presence of metal ions in the nanocomposite was confirmed by X-ray photoelectron spectroscopy (XPS) and high resolution transmission electron microscope (HR-TEM) mapping techniques. The fabricated electrode showed high specific capacitance of 710 F/g which was 3-fold higher than NMO (254 F/g). Read More

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Nanocomposite gels of poloxamine and Laponite for β-Lapachone release in anticancer therapy.

Eur J Pharm Sci 2021 Apr 27:105861. Epub 2021 Apr 27.

Drug Development Laboratory, Department of Pharmacy, Federal University of Rio Grande do Norte, 59010-180 Natal, RN, Brazil.

Nano-hybrid systems have been shown to be an attractive platform for drug delivery. Laponite® RD (LAP), a biocompatible synthetic clay, has been exploited for its ability to establish of strong secondary interactions with guest compounds and hybridization with polymers or small molecules that improves, for instance, cell adhesion, proliferation, and differentiation or facilitates drug attachment to their surfaces through charge interaction. In this work, LAP was combined with Tetronics, X-shaped amphiphilic PPO-PEO (poly (propylene oxide)-poly (ethylene oxide) block copolymers. Read More

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Green Synthesis and Applications of ZnO and TiO Nanostructures.

Molecules 2021 Apr 13;26(8). Epub 2021 Apr 13.

Department of Physics, School of Engineering, São Paulo State University (UNESP), Guaratinguetá, Sao Paulo 12516-410, Brazil.

Over the last two decades, oxide nanostructures have been continuously evaluated and used in many technological applications. The advancement of the controlled synthesis approach to design desired morphology is a fundamental key to the discipline of material science and nanotechnology. These nanostructures can be prepared via different physical and chemical methods; however, a green and ecofriendly synthesis approach is a promising way to produce these nanostructures with desired properties with less risk of hazardous chemicals. Read More

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Magnetic Properties of Iron Oxide Nanoparticles Do Not Essentially Contribute to Ferrogel Biocompatibility.

Nanomaterials (Basel) 2021 Apr 19;11(4). Epub 2021 Apr 19.

Institute of Natural Sciences and Mathematics, Ural Federal University, 620002 Ekaterinburg, Russia.

Two series of composite polyacrylamide (PAAm) gels with embedded superparamagnetic FeO or diamagnetic AlO nanoparticles were synthesized, aiming to study the direct contribution of the magnetic interactions to the ferrogel biocompatibility. The proliferative activity was estimated for the case of human dermal fibroblast culture grown onto the surfaces of these types of substrates. Spherical non-agglomerated nanoparticles (NPs) of 20-40 nm in diameter were prepared by laser target evaporation (LTE) electrophysical technique. Read More

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Comparative Overview of the Performance of Cementitious and Non-Cementitious Nanomaterials in Mortar at Normal and Elevated Temperatures.

Nanomaterials (Basel) 2021 Apr 2;11(4). Epub 2021 Apr 2.

Civil Engineering Department, College of Engineering, King Khalid University, Abha 61421, Saudi Arabia.

Nanotechnology has emerged as a field with promising applications in building materials. Nanotechnology-based mortars are examples of such building materials that have widespread applications in the construction industry. The main nanomaterials used in mortars include nano-silica, nano-magnesium oxide, nano-alumina, nano-titanium oxide, nano-zinc oxide, nano-clay, and nano-carbon. Read More

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Chemical and Structural Characterization of Amorphous and Crystalline Alumina Obtained by Alternative Sol-Gel Preparation Routes.

Materials (Basel) 2021 Apr 2;14(7). Epub 2021 Apr 2.

Faculty of Material Science and Ceramics, AGH University of Science and Technology, 30-059 Krakow, Poland.

Aluminum oxide is one of the most commonly used materials in the industry. It is used in the field of catalysis, refractories, and optics. Despite the fact that there are many techniques available, there is still a great challenge in obtaining a material with desired and designed properties. Read More

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Self-Healing and Highly Stretchable Hydrogel for Interfacial Compatible Flexible Paper-Based Micro-Supercapacitor.

Materials (Basel) 2021 Apr 8;14(8). Epub 2021 Apr 8.

School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China.

Most reported wearable electronic devices lack self-healing chemistry and flexible function to maintain stable energy output while irreversible damages and complex deformations. In this work, we report a dual-dynamic network electrolyte synthesized by micellar elastomers introduced into strong hydrogel matrix. The gel electrolyte is fabricated by physically cross-linking the borax-polyvinyl alcohol (B-PVA) network as tough matrix and poly (ethylene oxide) (PEO)-poly (propylene oxide) (PPO)-poly (ethylene oxide) (Pluronic) to frame elastic network, followed by immersion in potassium chloride solution. Read More

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Utilizing Edible Agar as a Carrier for Dual Functional Doxorubicin-FeO Nanotherapy Drugs.

Materials (Basel) 2021 Apr 7;14(8). Epub 2021 Apr 7.

Department of Chemistry, National Sun Yat-sen University, 70 Lien-Hai Rd., Kaohsiung 80424, Taiwan.

The purpose of this study was to use agar as a multifunctional encapsulating material to allow drug and ferromagnetism to be jointly delivered in one nanoparticle. We successfully encapsulated both FeO and doxorubicin (DOX) with agar as the drug carrier to obtain DOX-FeO@agar. The iron oxide nanoparticles encapsulated in the carrier maintained good saturation of magnetization (41. Read More

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Co3O4-CeO2 nanocomposites for Low Temperature CO Oxidation.

Chemistry 2021 Apr 29. Epub 2021 Apr 29.

Technische Universitat Wien, Institute of Materials Chemistry, Getreidemarkt 9/BC/165, 1060, Vienna, AUSTRIA.

In an effort to combine the favorable catalytic properties of Co3O4 and CeO2, nanocomposites with different phase distribution and Co3O4 loading were prepared and employed for CO oxidation. Synthesizing Co3O4-modified CeO2 via three different sol-gel based routes, each with 10.4 wt% Co3O4 loading, yielded three different nanocomposite morphologies: CeO2-supported Co3O4 layers, intermixed oxides and homogeneously dispersed Co. Read More

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Terminal sterilization influences the efficacy of an extracellular matrix-blood composite for treating posttraumatic osteoarthritis in the rat model.

J Orthop Res 2021 Apr 29. Epub 2021 Apr 29.

Department of Orthopaedic Surgery, Harvard Medical School, Boston Children's Hospital, Boston, Massachusetts, USA.

The objective was to determine if an intra-articular injection of an extracellular matrix (ECM) powder and blood composite (ECM-B) after anterior cruciate ligament (ACL) injury would have a mitigating effect on posttraumatic osteoarthritis and if that effect would be different with terminal sterilization of the ECM powder before use. Eighty Lewis rats underwent ACL transection and were divided into four groups: (1) intra-articular injection with phosphate-buffered saline (PBS; n = 20), (2) intra-articular injection of ECM-B using aseptically processed ECM (ASEPTIC; n = 20), (3) intra-articular injection of the ECM-busing ECM powder sterilized with 15 kGy electron beam irradiation (EBEAM; n = 20), and (4) intra-articular injection of the ECM-B using ECM powder sterilized with ethylene oxide (EO; n = 20). Twenty additional animals received capsulotomy only (SHAM). Read More

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Development of high performance alpha-Co(OH)/reduced graphene oxide microfilm for flexible in-sandwich and planar micro-supercapacitors.

J Colloid Interface Sci 2021 Apr 9;598:1-13. Epub 2021 Apr 9.

School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, Zhejiang 315211, PR China. Electronic address:

Herein, a series of alpha-Co(OH)/reduced graphene oxide (rGO) microfilms and film-based nanodevices were developed via a new scalable technique. Due to the unique hexagonal nanoplates of ultrathin alpha-Co(OH) and the intrinsically conductive nature of rGO sheets, such thin films not only can improve the conductivity of alpha-Co(OH) and prevent the re-stacking of alpha-Co(OH) and rGO sheets but also short the transport routes of electrons and ions between the electrode and the electrolyte. The optimized alpha-Co(OH)/rGO flexible electrode presents high specific capacitance (273. Read More

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Fabrication of a High-Performance Hybrid Supercapacitor Based on Hydrothermally Synthesized Highly Stable Cobalt Manganese Phosphate Thin Films.

Langmuir 2021 May 22;37(17):5260-5274. Epub 2021 Apr 22.

Centre for Interdisciplinary Research, D. Y. Education Society (Deemed to be University), Kasaba Bawada, Kolhapur 416 006, Maharashtra, India.

In the present study, cobalt manganese phosphate (H-CMP-series) thin films with different compositions of Co/Mn are prepared on stainless steel (SS) substrate via a facile hydrothermal method and employed as binder-free cathode electrodes in a hybrid supercapacitor. The XRD study reveals a monoclinic crystal structure, and the FE-SEM analysis confirmed that H-CMP-series samples displayed a nano/microarchitecture (microflowers to nanoflakes) on the surface of SS substrate with excess available surfaces and unique sizes. Interestingly, the synergy between cobalt and manganese species in the cobalt manganese phosphate thin film electrode demonstrates a maximum specific capacitance of 571 F g at a 2. Read More

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Mechanically Robust and Flexible Perovskite Solar Cells via a Printable and Gelatinous Interface.

ACS Appl Mater Interfaces 2021 May 22;13(17):19959-19969. Epub 2021 Apr 22.

Key Laboratory of Green Printing, Institute of Chemistry Chinese Academy of Sciences (ICCAS), Beijing 100190, P. R. China.

Dramatic development in perovskite solar cells (PSCs) and the widespread application of wearable electronics have attracted extensive research in the area of large-scale flexible solar power sources based on PSCs. Manufacturing of flexible PSCs by printing is considered to be one of the most potential methods. However, it is still a great challenge to print large-area uniform hole transport layers (HTLs) on a rough and soft plastic substrate to achieve flexible PSCs with high efficiency and good stability. Read More

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PVP Surface-Protected Silica Coated Iron Oxide Nanoparticles for MR Imaging Application.

J Biomater Sci Polym Ed 2021 Apr 21:1-11. Epub 2021 Apr 21.

Applied Chemistry Department, Faculty of Science, University of Mohaghegh Ardabili, Ardabil, Iran.

This paper proposed an engineered mesoporous silica-coated FeO nanoparticle, PVPMSFe, prepared by a sol-gel/surface-protected etching mechanism as an MRI T2 contrast agent. To this end, the structural characterization of the nanocomposite was performed by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) method, VSM, thermogravimetric analysis (TGA), TEM, FESEM, and energy-dispersive X-ray scanning electron microscopy (EDS). The findings show that the synthesized nanocomposite has a mesoporous structure with an average particle size of 11. Read More

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[Effects of bioactive glass on proliferation, differentiation and angiogenesis of human umbilical vein endothelial cells].

Beijing Da Xue Xue Bao Yi Xue Ban 2021 Feb;53(2):371-377

Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China.

Objective: To investigate the effects of phytic acid derived bioactive PO-SiO-CaO gel-glasses (PSC) on the proliferation, differentiation and angiogenesis of human umbilical vein endothelial cells (HUVECs) .

Methods: HUVECs were cultured in PSC extracts, which were prepared with endothelial cell medium (ECM) at a gradient concentration of 0.01, 0. Read More

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February 2021

Effects of Boron Oxide Concentration and Carbon Nanotubes Reinforcement on Bioactive Glass Scaffolds for Bone Tissue Engineering.

J Nanosci Nanotechnol 2021 Oct;21(10):5026-5035

Biomedical Research Lab, Department of Mechanical Engineering, Indian Institute of Technology, Kanpur 208016, India.

In this work, the effect of varying content of B₂O₃ with respect to SiO₂ on mechanical and bioactivity properties have been evaluated for borosilicate bioactive glasses containing SiO₂, B₂O₃, CaO and P₂O. The bioactive glasses have been synthesized using the sol-gel technique. The synthesized glasses were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and Field Emission Scanning electron microscopy (FESEM). Read More

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October 2021

Improving the quality of used frying niger seed oil with adsorbent treatment.

Heliyon 2021 Apr 8;7(4):e06748. Epub 2021 Apr 8.

Addis Ababa University, College of Natural and Computational Sciences, Center for Food Science and Nutrition, P.O. Box: 1176, Addis Ababa, Ethiopia.

High temperature continuous deep fat frying of foods will result in the frying oil and food quality deterioration. Although the quality can be retained by using fresh oil, this approach will increase the production cost. In this study, quality improvement of used niger seed oil using adsorbent treatment was evaluated. Read More

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MORPHOLOGICAL EFFICACY EVALUATION OF GEL WITH CARBON DIOXIDE EXTRACT OF HOPS IN CASE OF COMPLICATED WOUND INFECTION ACNE VULGARIS.

Wiad Lek 2021 ;74(1):112-117

KHARKIV NATIONAL MEDICAL UNIVERSITY, KHARKIV, UKRAINE.

Objective: The aim of the study is to reveal in the experiment the morphological features of the infected skin wounds healing, which are a manifestation of acne vulgaris severe and very severe forms, using a gel with carbon dioxide extract of hops.

Patients And Methods: Materials and methods: An experimental study was carried out on 80 male WAG rats of three months of age. The animals were divided into 9 groups. Read More

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Doped Zinc Oxide Nanoparticles: Synthesis, Characterization and Potential Use in Nanomedicine.

Appl Sci (Basel) 2020 Aug 28;10(15):5194. Epub 2020 Jul 28.

Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy.

Smart nanoparticles for medical applications have gathered considerable attention due to an improved biocompatibility and multifunctional properties useful in several applications, including advanced drug delivery systems, nanotheranostics and in vivo imaging. Among nanomaterials, zinc oxide nanoparticles (ZnO NPs) were deeply investigated due to their peculiar physical and chemical properties. The large surface to volume ratio, coupled with a reduced size, antimicrobial activity, photocatalytic and semiconducting properties, allowed the use of ZnO NPs as anticancer drugs in new generation physical therapies, nanoantibiotics and osteoinductive agents for bone tissue regeneration. Read More

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