ChemNanoMat最新文献_第8页

Bifunctional Zr-MgAl Layered Double Hydroxide Catalyst for Sustainable Transfer Hydrogenation of Ethyl Levulinate to γ-Valerolactone 双功能Zr-MgAl层状双氢氧化物催化剂乙酰丙酸乙酯可持续转移加氢制备γ-戊内酯

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-12-23 DOI: 10.1002/cnma.202400564

Sahil Kumar, Priyanka Choudhary, Devendra Sharma, Venkata Krishnan

引用次数: 0

Enhancing Epoxy Composites with Graphene and Graphene Oxide: Thermal and Mechanical Insights 增强环氧复合材料与石墨烯和氧化石墨烯：热和机械的见解

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-12-23 DOI: 10.1002/cnma.202400488

Sławomir Wilczewski, Zdzisław Nowak, Michał Maj, Magdalena Osial, PhD Roman Minikayev, Michael Giersig

{"title":"Enhancing Epoxy Composites with Graphene and Graphene Oxide: Thermal and Mechanical Insights","authors":"Sławomir Wilczewski, Zdzisław Nowak, Michał Maj, Magdalena Osial, PhD Roman Minikayev, Michael Giersig","doi":"10.1002/cnma.202400488","DOIUrl":"https://doi.org/10.1002/cnma.202400488","url":null,"abstract":"This paper shows the graphene and graphene oxide nanoflakes as the 0.1, 0.5, 1, 2, and 4 wt.% reinforcement of epoxy-resin matrix to enhance the thermal and mechanical characteristics of the composite. Experimental measurement of the glass transition temperature and thermal expansion coefficient indicated that the addition of nanostructural filler improving the glass transition temperature about ~12 °C for nanocomposite filled carbon-based nanoparticles for both heating and cooling cycles compared to the bare epoxy resin. Young's elastic modulus measured by nanoindentation and the stress versus strain curves for different weight fractions of graphene nanoflakes additives during uniaxial compression and tension considered were obtained from the experiments. The distributions of logarithmic strain field for the transverse, axial and shear components on the nanocomposites sample surfaces, during the uniaxial tension process for quasi-static strain rates, were analyzed. The tensile strengths show improvement for nanocomposites with less than 1 % weight fraction of carbon-based nanoparticles. The compressive yield stress increased to a maximal value (at the recorded peak on the curve) for an epoxy nanocomposite having 2 wt.% oxidized graphene flakes, where both parameters were enhanced with the oxidized form of graphene for the more effective dispersion in the epoxy resin matrix over the bare graphene filler.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bias Selectable Dual Band Detectors Based on Vertically Aligned In2S3-Coated ZnO Nanorod Arrays Grown on p-GaN 基于在p-GaN上生长的垂直排列in2s3包覆ZnO纳米棒阵列的偏置可选双波段探测器

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-12-23 DOI: 10.1002/cnma.202400557

Yu Qi, Lanfeng Li, Yaowen Xu, Guangcheng Gao, Naisen Yu, YunFeng Wu

引用次数: 0

Hierarchical Pore Engineering of Slope-Type Hard Carbon for Enhanced Sodium-Ion Storage 斜坡型硬碳增强钠离子储存的分级孔隙工程

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-12-23 DOI: 10.1002/cnma.202400562

Yongqi Liu, Yun Zhang, Zhaowei Hu, Wenjie Zhang, Chuan Wang, Jiabiao Lian

引用次数: 0

Fe−Ni with Chitosan via Microwave and Carboxymethyl as Electrode Materials for Supercapacitor 微波法制备壳聚糖和羧甲基Fe−Ni作为超级电容器电极材料

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-12-23 DOI: 10.1002/cnma.202400594

Dianyuan Zheng, Rongbin Yao, Chengxiang Sun, Jinli Li, Yuhang Zheng, Jianhong Zhu, Cheng Liu

{"title":"Fe−Ni with Chitosan via Microwave and Carboxymethyl as Electrode Materials for Supercapacitor","authors":"Dianyuan Zheng, Rongbin Yao, Chengxiang Sun, Jinli Li, Yuhang Zheng, Jianhong Zhu, Cheng Liu","doi":"10.1002/cnma.202400594","DOIUrl":"https://doi.org/10.1002/cnma.202400594","url":null,"abstract":"Iron-nickel double hydroxides (Fe−Ni) have been broadly synthesized for supercapacitors (SC). However, the influence of precipitant quantity on SC performance is one of the present challenges. Herein, we found that Fe0.64Ni0.36@ graphite electrodes, the open and interconnected 3D graded conductive network of carboxymethyl chitosan-derived porous carbon (C), have achieved effective surface contact. In addition, iron and nickel reinforced redox active materials on porous carbon will undergo more redox reactions for rapid diffusion of electrolyte ions/electrons. Due to the special construction and the synergistic effect of multiple oxidation transformations, the prepared Fe0.64Ni0.36@graphite composite material exhibits a maximum capacitance of 1232 F g−1 at a current density of 1 A g−1. The prepared Fe0.64Ni0.36@graphite//Fe0.64Ni0.36@graphite symmetric supercapacitors exhibit a high energy density of 22.9 Wh kg−1 at a power density of 771 W kg−1. Particularly, the sample exhibits excellent cycling stability, retaining approximately 95.8 % capacitance after 5000 cycles.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 3","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of Ferulic Acid-Cellulose Nanocrystal Enhanced Stretchable and Antibacterial Hydrogels 阿魏酸-纤维素纳米晶增强拉伸和抗菌水凝胶的制备

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-12-16 DOI: 10.1002/cnma.202400560

Fangyu Li, Yajie Wang, Luchun Xu, Xiaxue Li, Wangcheng Song, Yanyong Mao, Jia Zhou, Hao Shi

{"title":"Fabrication of Ferulic Acid-Cellulose Nanocrystal Enhanced Stretchable and Antibacterial Hydrogels","authors":"Fangyu Li, Yajie Wang, Luchun Xu, Xiaxue Li, Wangcheng Song, Yanyong Mao, Jia Zhou, Hao Shi","doi":"10.1002/cnma.202400560","DOIUrl":"https://doi.org/10.1002/cnma.202400560","url":null,"abstract":"Hydrogels are widely utilized in biomaterials, medicine, and food science due to their versatile properties. This study developed a ferulic acid (FA) and cellulose nanocrystals (CNC) hydrogel within a polyacrylamide matrix, polymerized using ammonium persulfate and crosslinked with N-methylenebisacrylamide. The FA@CNC hydrogel demonstrated exceptional tensile ductility and elasticity. Antibacterial evaluations against Escherichia coli and Staphylococcus aureus revealed significant efficacy, with activity increasing proportionally to FA concentration. Swelling studies indicated a maximum equilibrium swelling ratio of 1210 % after 36 h, showcasing the hydrogel's ability to undergo substantial expansion while maintaining its original shape and structural integrity. It was indicated that the synthesized hydrogels were capable of absorbing large volumes of exudate while preserving a moist environment conducive to accelerated wound healing. Scanning electron microscopy analysis confirmed a regular and dense microstructure, which contributes to the hydrogel's mechanical stability and robustness. The optimized preparation process developed in this study resulted in hydrogels with significantly enhanced performance. These findings underscore the hydrogel's superior mechanical and functional properties, paving the way for innovative applications across biomaterials, medical, and food-related industries.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrothermally Synthesized Bi-Cr-Te Nanocomposites With Enhanced Nonlinear Two-Photon Absorption 具有增强非线性双光子吸收的水热合成Bi-Cr-Te纳米复合材料

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-12-10 DOI: 10.1002/cnma.202400516

S. Supriya, M. Mallik, A. Parida, R. Naik

{"title":"Hydrothermally Synthesized Bi-Cr-Te Nanocomposites With Enhanced Nonlinear Two-Photon Absorption","authors":"S. Supriya, M. Mallik, A. Parida, R. Naik","doi":"10.1002/cnma.202400516","DOIUrl":"https://doi.org/10.1002/cnma.202400516","url":null,"abstract":"This study highlights the importance of exploring BiCrTe nanocomposites to uncover their distinctive properties and potential applications. Three BiCrTe samples were synthesized using hydrothermal methods by varying the concentrations of Bi and Cr while maintaining a constant Te content. X-ray diffraction (XRD) confirmed the presence of Bi₂Te₃ and Cr₂Te₃ phases, supported by transmission electron microscopy (TEM) observations. A reduction in Bi content led to smaller crystallite sizes. Raman spectroscopy revealed characteristic vibrational modes associated with Bi₂Te₃ and Cr. Field emission scanning electron microscopy (FESEM) confirmed the nanoparticle-like morphology of the composites. X-ray photoelectron spectroscopy (XPS) provided detailed surface composition and electronic structure data, verifying the presence of all constituent elements. UV-Vis spectroscopy demonstrated a blueshift in absorbance with decreasing Bi content, with bandgap (Eg) values ranging from 3.31 to 3.61 eV. This increase in bandgap correlated with a reduction in refractive index (n). Nonlinear optical (NLO) studies revealed two-photon absorption behavior, along with a positive nonlinear absorption coefficient (β), third-order susceptibility (χ (3)), and refractive index (n2). These findings indicate that BiCrTe nanocomposites hold significant promise for advanced optoelectronic applications.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143113693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrothermally Synthesized Cobalt-Doped NiO Nanoflakes: Enhanced Electrochemical Performance for High-Performance Supercapacitors 水热合成钴掺杂NiO纳米片：增强高性能超级电容器的电化学性能

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-12-09 DOI: 10.1002/cnma.202400580

Suresh Jayakumar, P. Chinnappan Santhosh, K. V. Rishikesh, A. V. Radhamani

{"title":"Hydrothermally Synthesized Cobalt-Doped NiO Nanoflakes: Enhanced Electrochemical Performance for High-Performance Supercapacitors","authors":"Suresh Jayakumar, P. Chinnappan Santhosh, K. V. Rishikesh, A. V. Radhamani","doi":"10.1002/cnma.202400580","DOIUrl":"https://doi.org/10.1002/cnma.202400580","url":null,"abstract":"This study examines cobalt-doped nickel oxide (Co-NiO) nanomaterials synthesized through a hydrothermal method, focusing on their potential as high-performance electrodes for supercapacitors. By varying cobalt dopant concentrations (X=0, 0.01, 0.05, 0.1), we aimed to enhance the electrochemical properties through strategic Co-doping. The CoxNi1-xO nanomaterials were characterized using several techniques, including X-ray diffraction (XRD), UV-visible spectroscopy, field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), cyclic voltammetry (CV), chronopotentiometry (CP), and electrochemical impedance spectroscopy (EIS). The analysis showed that Co-doping preserved the NiO phase structure while significantly altering the morphology and electrochemical characteristics. The sample with (X=0.1) achieved a specific capacitance of 880 F/g at a current density of 1 A/g, significantly outperforming the undoped NiO, which had a capacitance of 335 F/g. Additionally, the Co-NiO demonstrated 83.3 % capacitance retention after 1000 cycles at a current density of 10 A/g. These findings highlight the potential of Co-NiO as an effective electrode material for supercapacitors.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Perfectly Hexagonal Sponge-Like NiO-NiCo2O4 with Rich Electromicrostructural Physiognomies for High-Efficiency Electrocatalytic Urea Oxidation 具有丰富电显微结构的完美六方海绵状NiO-NiCo2O4高效电催化尿素氧化

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-12-09 DOI: 10.1002/cnma.202400476

Siddhant Srivastav, Mahesh Kumar Paliwal, Sumanta Kumar Meher

{"title":"Perfectly Hexagonal Sponge-Like NiO-NiCo2O4 with Rich Electromicrostructural Physiognomies for High-Efficiency Electrocatalytic Urea Oxidation","authors":"Siddhant Srivastav, Mahesh Kumar Paliwal, Sumanta Kumar Meher","doi":"10.1002/cnma.202400476","DOIUrl":"https://doi.org/10.1002/cnma.202400476","url":null,"abstract":"In order to design high-efficiency electrocatalysts for the development of urea oxidation reaction (UOR)-based energy conversion and storage systems, herein, a very facile and kinetically controlled material growth strategy has been strategized to prepare extremely uniform and perfectly hexagonal sponge-like NiO-NiCo2O4 with high BET surface area (126 m2 g−1), monomodal distribution of mesopores (~3.9 nm), hierarchical surface as well as matrix porosity, mixed-phase lattice structure, thorough atomic non-stoichiometry and multiple valency of Ni and Co (i. e. Ni2+, Ni3+, Co2+ and Co3+). The potential of NiO-NiCo2O4 is thoroughly explored for electrocatalytic UOR in alkaline electrolyte medium. The in-depth electrochemical analyses demonstrate rich redox reversibility, high UOR current density, very-low charge transfer and series resistance, and typical Warburg response indicative of facilitated diffusion of electrolyte ions during electrocatalytic UOR. Furthermore, the NiO-NiCo2O4 requires lower overpotential for effective UOR and exhibits minimal current loss during electrocatalytic UOR for prolonged duration. Proposedly, the multiple oxidation states of Ni and Co in NiO-NiCo2O4, combined with its rich physicoelectrochemical physiognomies, offer lowly-impeded electrolyte ion intercalation-deintercalation, good electronic conductivity, higher number of accessible redox active sites, facile adsorption of urea on the electrocatalytic sites and inhibition in the blockage of active sites by side products to augment the overall UOR kinetics. The optimized approach presented in this study is poised to advance the catalyst systems for UOR, which will lead to the development of high-efficiency urea-based energy conversion and storage systems for prospective integration in contemporary electronic architectures.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Front Cover: Trichosanthes Cucumerina Derived Activated Carbon: The Potential Electrode material for High Energy Symmetric Supercapacitor (ChemNanoMat 12/2024) 封面：葫芦瓜衍生活性炭：高能对称超级电容器的电位电极材料（ChemNanoMat 12/2024）

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-12-07 DOI: 10.1002/cnma.202481201

Anit Joseph, Arshitha Mathew, Tiju Thomas

引用次数: 0