ChemRN EM Feeds最新文献

筛选

英文中文

Highly Sensitive Electrochemical Sensor for Dopamine and Uric Acid Based on TiO2@C Composite Material Derived from MIL-125 基于TiO2@C MIL-125复合材料的高灵敏度多巴胺和尿酸电化学传感器

ChemRN EM Feeds Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3937877

Cheng Rong, Xiaozhen Fang, Pengfei Li, Biao Huang, Xinyu Zheng

{"title":"Highly Sensitive Electrochemical Sensor for Dopamine and Uric Acid Based on TiO2@C Composite Material Derived from MIL-125","authors":"Cheng Rong, Xiaozhen Fang, Pengfei Li, Biao Huang, Xinyu Zheng","doi":"10.2139/ssrn.3937877","DOIUrl":"https://doi.org/10.2139/ssrn.3937877","url":null,"abstract":"TiO2@C material was prepared through the annealing of MIL-125 at 750°C under a nitrogen atmosphere. XRD, SEM, HRTEM, Raman and XPS methods were applied to characterize TiO2@C, and the results showed that Ti-O clusters in MIL-125 were transformed into anatase TiO2, and carbon matrix was evenly covered on the surface of TiO2 in roughly equal proportion with graphite and amorphous states after high-temperature treatment. The synchronous detection ability of TiO2@C modified glassy carbon electrode (denoted as TiO2@C/GCE) for dopamine (DA) and uric acid (UA) was investigated. There are three linear ranges between the detection currents and the concentrations of DA and UA on the TiO2@C/GCE loaded with 3μL 1 mg·mL-1 of TiO2@C, which are 0.2-20, 20-200, 200-800 μM for DA and 0.2-5, 5-50, 50-200 μM for UA, and the minimum detection limits of TiO2@C/GCE for DA and UA are all 0.04 μM. TiO2@C/GCE has high stability, reusability and anti-interference. Even in the presence of ascorbic acid (AA), the current peaks of DA and UA do not interfere with each other. In the detection of actual samples, the recoveries of DA and UA are between 100.19-101.87% and 93.09-105.30%, respectively.","PeriodicalId":310840,"journal":{"name":"ChemRN EM Feeds","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122952952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Template-Assisted Synthesis of Accordion-Like CoFe(OH)X Nanosheet Clusters on GO Sheets for Electrocatalytic Water Oxidation 在氧化石墨烯上模板辅助合成手风琴状CoFe(OH)X纳米片簇用于电催化水氧化

ChemRN EM Feeds Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3902687

Jia Cheng, Xiao‐Yang Yue, Caixia Chen, Xiaoping Shen, Shiping Zeng, Zhenyuan Ji, Aihua Yuan, Guoxing Zhu

{"title":"Template-Assisted Synthesis of Accordion-Like CoFe(OH)X Nanosheet Clusters on GO Sheets for Electrocatalytic Water Oxidation","authors":"Jia Cheng, Xiao‐Yang Yue, Caixia Chen, Xiaoping Shen, Shiping Zeng, Zhenyuan Ji, Aihua Yuan, Guoxing Zhu","doi":"10.2139/ssrn.3902687","DOIUrl":"https://doi.org/10.2139/ssrn.3902687","url":null,"abstract":"Developing highly efficient, low-cost and stable electrocatalysts for oxygen evolution reaction (OER) is momentous to achieve the conversion and storage of sustainable energy. Herein, the CoFe(OH) x / GO composites with accordion-like CoFe(OH) x nanosheets clusters dispersed on graphene oxide (GO) sheets are prepared via a template-assisted route. It is found that the OER performance of the CoFe(OH) x / GO composites strongly depends on the content of GO and the mole ratio of Co/Fe. The optimized CoFe(OH) x / GO composites exhibit remarkably enhanced OER electrocatalytic activity in 1 M KOH with a low overpotential of 294 mV at 10 mA cm -2 and a small Tafel slope of 63.4 mV dec -1 , which are far superior to the corresponding Co(OH) 2 / GO and bare CoFe(OH) x . The enhanced electrocatalytic activity can be ascribed to the regulated electronic structure surrounding the active metal sites by introducing Fe, the improved conductivity by GO for faster charge transfer, and the accordion-like hierarchical structure with increased accessible active sites. This work demonstrates a comprehensive strategy to improve the electrocatalytic performance of transition metal hydroxide based OER catalysts.","PeriodicalId":310840,"journal":{"name":"ChemRN EM Feeds","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128608575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Two Novel Co (II) Bifunctional MOFs: Synthesis and Applications in Photocatalytic Degradation of Dyes and Electro Catalytic Water Oxidation 两种新型Co (II)双功能MOFs的合成及其在染料光催化降解和电催化水氧化中的应用

ChemRN EM Feeds Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3871573

Guan Cui, Wenbo Liu, Lulu Wang, Ruixue Wu, C. Bi, Dong-mei Zhang, Yu-hua Fan

引用次数: 0

首页上一页