文献类型：期刊文献

英文题名：Uncapped nanobranch-based CuS clews used as an efficient peroxidase mimic enable the visual detection of hydrogen peroxide and glucose with fast response

作者：Niu, Xiangheng[1,2];He, Yanfang[2];Pan, Jianming[2];Li, Xin[2];Qiu, Fengxian[2];Yan, Yongsheng[1];Shi, Libo[3];Zhao, Hongli[3];Lan, Minbo[3]

机构：[1]Jiangsu Univ, Inst Green Chem & Chem Technol, Zhenjiang 212013, Peoples R China;[2]Jiangsu Univ, Sch Chem & Chem Engn, Zhenjiang 212013, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China

年份：2016

卷号：947

起止页码：42

外文期刊名：ANALYTICA CHIMICA ACTA

收录：;EI(收录号：20164703042648);WOS:【SCI-EXPANDED(收录号:WOS:000388108700006)】；

基金：This work was financially supported by the National Natural Science Foundation of China (Nos. 21605061 and 31601549), the Natural Science Foundation of Jiangsu Province (No. BK20160489), the Natural Science Fund for Colleges and Universities in Jiangsu Province (No. 16KJB150009), the Open Fund from Shanghai Key Laboratory of Functional Materials Chemistry (No. SKLFMC201601), and the Start-Up Research Fund of Jiangsu University (No. 15JDG143).

语种：英文

外文关键词：Uncapped nanobranch-based CuS clews; Mimetic peroxidase; Colorimetric detection; H2O2; Glucose

摘要：Nanosized materials acting as substitutes of natural enzymes are currently attracting significant research due to their stable enzyme-like characteristics, but some flaws of these nanozymes, including their limited catalytic rate and efficiency, need to be remedied to enable their wider applications. In this work, we verify for the first time the catalytic behavior of uncapped nanobranch-based CuS clews as a peroxidase mimic. XRD, XPS, SEM, and TEM proofs demonstrate that high-purity CuS clews composed of intertwined wires with abundant nanodendrites outside are successfully produced via a facile one-pot hydrothermal synthesis approach, with thiourea as both the sulfion source and the structure-directing agent. The synthesized CuS can catalytically oxidize 3,3',5,5'-tetramethylbenzidine (TMB) by H2O2 to trigger a visible color reaction with rapid response (reaching a maximum change within 5 min). The proposed CuS nanozyme exhibits preferable catalytic kinetics over natural horseradish peroxidase (HRP). This outstanding activity primarily results from the large surface area and rich sites exposed by the uncapped unique structure. Under optimized conditions, the fabricated sensing system provides linear absorbance (652 nm) changes in the H2O2 concentration range of 0.2130 mu M, with a detection limit of as low as 63 nM. When coupled with glucose oxidase (GOD), the system is demonstrated to be capable of monitoring glucose in blood samples with excellent performance. (C) 2016 Elsevier B.V. All rights reserved.