检索结果-南通市图书馆

Tuning electrochemical water activation over NiIr single-atom alloy aerogels for stable electrochemiluminescence

Science Bulletin 2024年第15期69卷 2387-2394页

作者： Ling Ling Mengzhen Xi Hengjia Wang Runshi Xiao Lirong Zheng Liuyong Hu Wenling Gu chengzhou zhu State Key Laboratory of Green Pesticide International Joint Research Center for Intelligent Biosensing Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079China Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Hubei Engineering Technology Research Center of Optoelectronic and New Energy MaterialsWuhan Institute of TechnologyWuhan 430205China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

The anodic oxygen evolution reaction is a well-acknowledged side reaction in traditional aqueous electrochemiluminescence(ECL) systems due to the generation and surface aggregation of oxygen at the electrode, which detrimentally impacts the stability and efficiency of ECL emission. However, the effect of reactive oxygen species generated during water oxidation on ECL luminophores has been largely overlooked. Taking the typical luminol emitter as an example, herein, we employed NiIr single-atom alloy aerogels possessing efficient water oxidation activity as a prototype co-reaction accelerator to elucidate the relationship between ECL behavior and water oxidation reaction kinetics for the first time. By regulating the concentration of hydroxide ions in the electrolyte, the electrochemical oxidation processes of both luminol and water are finely tuned. When the concentration of hydroxide ions in electrolyte is low,the kinetics of water oxidation is attenuated, which limits the generation of oxygen, effectively mitigates the influence of oxygen accumulation on the ECL strength, and offers a novel perspective for harnessing side reactions in ECL systems. Finally, a sensitive and stable sensor for antioxidant detection was constructed and applied to the practical sample detection.

关键词： Electrochemiluminescence Luminol Water activation Single-atom doping Sensing

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Aqueous-Phase Synthesis ofAg-TiO2-Reduced Graphene Oxide and Pt-TiO2-Reduced Graphene Oxide Hybrid Nanostructures and Their Catalytic Properties

引用

Nano Research 2011年第11期4卷 1153-1162页

作者： Ping Wang Lei Han chengzhou zhu Yueming Zhai Shaojun Dong State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun130022 China

We demonstrate an aqueous solution method for the synthesis of a Ag-TiO2-reduced graphene oxide （rGO） hybrid nanostructure （NS） in which the Ag and TiO2 particles are well dispersed on the rGO sheet. The Ag-TiO2-rGO NS was then used as a template to synthesize Pt-TiO2-rGO NS. The resulting hybrid NSs were characterized by transmission electron microscopy （TEM）, high-resolution TEM （HRTEM）, energy-dispersive X-ray （EDX） spectroscopy, X-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS）, Fourier transform infrared （FTIR） spectroscopy, UV-vis spectroscopy, Raman spectroscopy, inductively coupled plasma mass spectrometry （ICP-MS）, and catalytic studies. It was found that TiO2-rGO, Ag-TiO2-rGO and Pt-TiO2-rGO NSs all show catalytic activity for the reduction of p-nitrophenol to p-aminophenol by NaBH4, and that Pt-TiO2-rGO NS exhibits the highest catalytic activity as well as excellent stability and easy recyclability.

关键词： Reduced graphene oxide TiO2 silver platinum hybrid nanostructures catalytic

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

One-Step Electrochemical Approach to the Synthesis of Graphene/MnO2 Nanowall Hybrids

引用

Nano Research 2011年第7期4卷 648-657页

作者： chengzhou zhu Shaojun Guo Youxing Fang Lei Han Erkang Wang Shaojun Dong State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun130022 China

We have demonstrated a one-step and effective electrochemical method to synthesize graphene/MnO2 nanowall hybrids （GMHs）. Graphene oxide （GO） was electrochemically reduced to graphene （GN）, accompanied by the simultaneous formation of MnO2 with a nanowall morphology via cathodic electrochemical deposition. The morphology and structure of the GMHs were systematically characterized by scanning electron microscope （SEM）, X-ray photoelectron spectroscopy （XPS）, X-ray diffraction （XRD）, and Raman spectroscopy. The resulting GMHs combine the advantages of GN and the nanowall array morphology of MnO2 in providing a conductive network of amorphous nanocomposite, which shows good electrochemical capacitive behavior. This simple approach should find practical applications in the large-scale production of GMHs.

关键词： Graphene manganese dioxide nanocomposites electrochemical reduction

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

One-Step, Solvothermal Synthesis of Graphene-CdS and Graphene-ZnS Quantum Dot Nanocomposites and Their Interesting Photovoltaic Properties

引用

Nano Research 2010年第11期3卷 794-799页

作者： Ping Wang Tengfei Jiang chengzhou zhu Yueming Zhai Dejun Wang Shaojun Dong State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China College of Chemistry Jilin UniversityChangchun 130012China

The synthesis of graphene-semiconductor nanocomposites has attracted increasing attention due to their interesting optoelectronic *** the synthesis of such nanocomposites,with decorated particles well dispersed on graphene,is still a great *** work reports a facile,one-step,solvothermal method for the synthesis of graphene-CdS and graphene-ZnS quantum dot nanocomposites directly from graphene oxide,with CdS and ZnS very well dispersed on the graphene *** measurements showed that the integration of CdS and ZnS with graphene significantly decreases their *** photovoltage studies revealed that the graphene-CdS nanocomposite exhibits a very unexpected strong positive photovoltaic response,while separate samples of graphene and CdS quantum dots(QDs)of a similar size do not show any photovoltaic response.

关键词： Graphene CdS ZnS quantum dots charge transfer photovoltaic

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Secondary-Atom-Doping Enables Robust Fe-N-C Single-Atom Catalysts with Enhanced Oxygen Reduction Reaction

引用

Nano-Micro Letters 2020年第11期12卷 281-291页

作者： Xin Luo Xiaoqian Wei Hengjia Wang Wenling Gu Takuma Kaneko Yusuke Yoshida Xiao Zhao chengzhou zhu Key Laboratory of Pesticide and Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensing Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079People’s Republic of China Innovation Research Center for Fuel Cells The University of Electro-CommunicationsChofugaokaChofuTokyo 182‑8585Japan

Single-atom catalysts(SACs) with nitrogen-coordinated nonprecious metal sites have exhibited inimitable advantages in ***,a large room for improving their activity and durability ***,we construct atomically dispersed Fe sites in N-doped carbon supports by secondary-atom-doped *** the secondary doping,the density and coordination environment of active sites can be efficiently tuned,enabling the simultaneous improvement in the number and reactivity of the active ***,structure optimizations in terms of the enlarged surface area and improved hydrophilicity can be achieved *** to the beneficial microstructure and abundant highly active FeN_5 moieties resulting from the secondary doping,the resultant catalyst exhibits an admirable half-wave potential of 0.81 V versus 0.83 V for Pt/C and much better stability than Pt/C in acidic *** work would offer a general strategy for the design and preparation of highly active SACs for electrochemical energy devices.

关键词： Single-atom catalysts Fe-N-C catalysts Doping Porous nanostructures Oxygen reduction reaction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Multifunctional SnO2/3D graphene hybrid materials for sodium-ion and lithium-ion batteries with excellent rate capability and long cycle life

引用

Nano Research 2017年第12期10卷 4398-4414页

作者： Jung-ln Lee Junhua Song Younghwan Cha Shaofang Fu chengzhou zhu Xiaolin Li Yuehe Lin Min-Kyu Song School of Mechanical and Materials Engineering Washington State University Pullman WA 99164 USA Energy & Environment Directorate Pacific North west National Laboratory Richland WA 99352 USA Pacific Northwest National Laboratory Richland WA 99352 USA

SnO2 is a promising material for both Li-ion and Na-ion batteries owing to its high theoretical capacities. Unfortunately, the electrochemical performance of SnO2 is unsatisfactory because of the large volume change that occurs during cycling, low electronic conductivity of inactive oxide matrix, and poor kinetics, which are particularly severe in Na-ion batteries. Herein, ultra-fine SnO2 nanocrystals anchored on a unique three-dimensional （3D） porous reduced graphene oxide （rGO） matrix are described as promising bifunctional electrodes for Li-ion and Na-ion batteries with excellent rate capability and long cycle life. Ultra-fine SnO2 nanocrystals of size -6 nm are well-coordinated to the graphene sheets that comprise the 3D macro-porous structure. Notably, superior rate capability was obtained up to 3 C （1In C is a measure of the rate that allows the cell to be charged/discharged in n h） for both batteries. In situ X-ray diffractometry measurements during lithiation （or sodiation） and delithiation （or desodiation） were combined with various electrochemical techniques to reveal the real-time phase evolution. This critical information was linked with the internal resistance, ion diffusivity （DLi＋ and DNa＋）, and the unique structure of the composite electrode materials to explain their excellent electrochemical performance. The improved capacity and superior rate capabilities demonstrated in this work can be ascribed to the enhanced transport kinetics of both electrons and ions within the electrode structure because of the well-interconnected, 3D macro-porous rGO matrix. The porous rGO matrix appears to play a more important role in sodium-ion batteries （SIBs）, where the larger mass/radius of Na-ions are marked concerns.

关键词： sodium-ion batteries (SIBs) lithium-ion batteries (LIBs) SnO2 three-dimensional (3D)graphene hybrid materials

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tuning Atomically Dispersed Fe Sites in Metal–Organic Frameworks Boosts Peroxidase‑Like Activity for Sensitive Biosensing

引用

Nano-Micro Letters 2020年第12期12卷 392-403页

作者： Weiqing Xu Yikun Kang Lei Jiao Yu Wu Hongye Yan Jinli Li Wenling Gu Weiyu Song chengzhou zhu Key Laboratory of Pesticide and Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensing Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079People’s Republic of China State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249People’s Republic of China

Although nanozymes have been widely developed,accurate design of highly active sites at the atomic level to mimic the electronic and geometrical structure of enzymes and the exploration of underlying mechanisms still face significant ***,two functional groups with opposite electron modulation abilities(nitro and amino)were introduced into the metal–organic frameworks(MIL-101(Fe))to tune the atomically dispersed metal sites and thus regulate the enzymelike ***,the functionalization of nitro can enhance the peroxidase(POD)-like activity of MIL-101(Fe),while the amino is poles *** calculations demonstrate that the introduction of nitro can not only regulate the geometry of adsorbed intermediates but also improve the electronic structure of metal active *** from both geometric and electronic effects,the nitro-functionalized MIL-101(Fe)with a low reaction energy barrier for the HO*formation exhibits a superior POD-like *** a concept of the application,a nitro-functionalized MIL-101(Fe)-based biosensor was elaborately applied for the sensitive detection of acetylcholinesterase activity in the range of 0.2–50 mU mL−1 with a limit of detection of 0.14 mU mL−***,the detection of organophosphorus pesticides was also *** work not only opens up new prospects for the rational design of highly active nanozymes at the atomic scale but also enhances the performance of nanozyme-based biosensors.

关键词： Nanozymes Metal–organic frameworks Atomically dispersed sites Peroxidase-like activity Biosensors

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Protein trap-engineered metal-organic frameworks for advanced enzyme encapsulation and mimicking

引用

Nano Research 2023年第2期16卷 3364-3371页

作者： Weiqing Xu Yu Wu Lei Jiao Meng Sha Xiaoli Cai Yating Wen Yifeng Chen Wenling Gu chengzhou zhu Key Laboratory of Pesticide and Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensing Technology and HealthCollege of Chemistry Central China Normal UniversityWuhan 430079China

Immobilizing enzymes within metal-organic frameworks(MOFs)enables enzymes to against extreme ***,these MOF shells are just like armors,protective but heavy,which shield the enzymes from threats while locking them in the *** exploitation of immobilization strategy and intrinsic property of MOFs themselves is of great ***,we proposed a functional protein trap strategy for efficient enzyme *** ferrocenedicarboxylic acid(Fc)was used to induce the formation of defect-rich Co-based MOFs(CoBDC-Fc).As result,the engineered protein trap can not only improve the enzyme loading but also accelerate catalytic ***,the atomically dispersed Fc sites serve as cocatalysts/cofactors and even change the conformation of enzymes in the construed ***,the obtained CoBDC-Fc/enzyme exhibits excellent recyclability and tolerance to inhospitable *** by these,the CoBDC-Fc/enzyme/antigen composites were further prepared for cascade enzyme-linked immunosorbent assay of prostate-specific antigen with satisfactory sensitivity.

关键词： enzyme immobilization metal-organic frameworks biocatalysis nanozymes immunoassay

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Iron-Imprinted Single-Atomic Site Catalyst-Based Nanoprobe for Detection of Hydrogen Peroxide in Living Cells

引用

Nano-Micro Letters 2021年第9期13卷 364-376页

作者： Zhaoyuan Lyu Shichao Ding Maoyu Wang Xiaoqing Pan Zhenxing Feng Hangyu Tian chengzhou zhu Dan Du Yuehe Lin School of Mechanical and Materials Engineering Washington State UniversityPullmanWA 99164USA School of Chemical Biologicaland Environmental EngineeringOregon State UniversityCorvallisOR 97331USA Irvine Materials Research Institute(IMRI) University of CaliforniaIrvineCA 92697USA

Fe-based single-atomic site catalysts(SASCs),with the natural metalloproteases-like active site structure,have attracted widespread attention in biocatalysis and ***,controlling the isolated single-atom Fe-N-C active site structure is crucial to improve the SASCs’*** this work,we use a facile ion-imprinting method(IIM)to synthesize isolated Fe-N-C single-atomic site catalysts(IIM-Fe-SASC).With this method,the ion-imprinting process can precisely control ion at the atomic level and form numerous well-defined single-atomic Fe-N-C *** IIM-Fe-SASC shows better peroxidase-like activities than that of non-imprinted *** to its excellent properties,IIM-Fe-SASC is an ideal nanoprobe used in the colorimetric biosensing of hydrogen peroxide(H_(2)O_(2)).Using IIM-Fe-SASC as the nanoprobe,in situ detection of H_(2)O_(2)generated from MDA-MB-231 cells has been successfully demonstrated with satisfactory sensitivity and *** work opens a novel and easy route in designing advanced SASC and provides a sensitive tool for intracellular H_(2)O_(2)detection.

关键词： Single-atomic site catalysts Nanoprobe Peroxidase-like activities Biosensing Living cell

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Nanozyme Enhanced Colorimetric Immunoassay for Naked-Eye Detection of Salmonella Enteritidis

引用

Journal of Analysis and Testing 2019年第1期3卷 99-106页

作者： Nan Cheng chengzhou zhu Yinling Wang Dan Du Mei-Jun zhu Yunbo Luo Wentao Xu Yuehe Lin School of Mechanical and Materials Engineering Washington State UniversityPullmanWA 99164USA Beijing Advanced Innovation Center for Food Nutrition and Human Health College of Food Science and Nutritional EngineeringChina Agricultural UniversityBeijing 100083People’s Republic of China School of Food Science Washington State UniversityPullmanWA 99164USA

Salmonella Enteritidis is a major public health threat of global proportions,while it is still a serious challenge to develop point-of-care detection *** this study,nanozymes(Fe-MOF nanoparticles)were successfully synthesized and applied as signal in a colorimetric immunoassay for naked-eye detection of Salmonella *** optimization,the proposed assay was able to detect Salmonella Enteritidis with a detection limit of 34 CFU/*** coefficients of variation(CV)of the test were less than 7.0%after 30 days storage at 4°*** estimated recoveries in milk samples of the colorimetric immu-noassay range from 94.68 to 124%,which indicated the developed method is capable of detecting Salmonella Enteritidis in real *** method provides a potential platform for Salmonella detection with naked eyes,which has a significant application value for foodborne pathogen analysis at the point-of-care.

关键词： Salmonella Enteritidis Nanozyme Magnetic beads Colorimetric detection Immunoassay

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：