文献类型：期刊文献

英文题名：One-pot synthesis of an RGO/ZnO nanocomposite on zinc foil and its excellent performance for the nonenzymatic sensing of xanthine

作者：Zhang, Xiaojuan[1];Dong, Junping[2];Qian, Xiuzhen[1];Zhao, Chongjun[1]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Adv Polymer Mat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China;[2]Shanghai Univ, Dept Chem, Coll Sci, Shanghai 200444, Peoples R China

年份：2015

卷号：221

起止页码：528

外文期刊名：SENSORS AND ACTUATORS B-CHEMICAL

收录：;EI(收录号：20152901038057);WOS:【SCI-EXPANDED(收录号:WOS:000362918100070)】；

基金：We are grateful for the support of the National Natural Science Foundation of China (No. 20504026), the Shanghai Natural Science Foundation (No. 13ZR1411900), the Shanghai Leading Academic Discipline Project (B502), and the Shanghai Key Laboratory Project (08DZ2230500).

语种：英文

外文关键词：Reduced graphene oxide; Zinc oxide; Xanthine; Nonenzymatic biosensor

摘要：A novel nonenzymatic xanthine (Xa) sensor was developed based on reduced graphene oxide (RGO)/zinc oxide (ZnO)/Zn foil. RGO/ZnO nanocomposites were grown directly on the surface of zinc foil through a hydrothermo-assisted redox reaction between graphene oxide (GO) and Zn foil. The as-synthesized RGO/ZnO/Zn foils were characterized through X-ray diffraction (XRD), Raman spectroscopy, and a field emission scanning electron microscope (FESEM), and the results confirmed that ZnO nanoparticles were dispersed highly inside RGO sheets. The RGO/ZnO/Zn foil was used directly as a xanthine electrochemical sensor, and its performance was evaluated through cyclic voltammetry and differential pulse voltammetry in a pH 7.0 phosphate buffer solution. This nonenzymatic biosensor showed a linear response to xanthine in concentrations ranging from 5 to 400 mu M, with a sensitivity of 2.10 mu A.mu M-1 cm(-2) and a detection limit of 1.67 mu M (S/N = 3). The present work supplies a new insight into the one-step preparation of graphene/metal oxide composite film on the conductive metal substrate and its application as an electrochemical sensor. (C) 2015 Elsevier B.V. All rights reserved.