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Photoelectrochemical Detection of H2O2 Based on Flower-Like CuInS2-Graphene Hybrid

Authors

  • Siwen Wang,

    1. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
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  • Yihua Zhu,

    Corresponding author
    1. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
    • Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China

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  • Xiaoling Yang,

    1. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
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  • Chunzhong Li

    1. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
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Abstract

A novel photoelectrochemcial biosensing system was fabricated based on the composition of horseradish peroxidase (HRP), flower-like CuInS2 (CIS) and graphene on indium tin oxide (ITO) electrode for detecting H2O2. The graphene layer was used as highly conductive scaffolds for electron transport from the ITO electrode to CIS. Furthermore, the flower-like CIS enhanced the multi-reflection of light and provided matrixes for the adsorption of HRP. Utilizing one-pot solvothermal method, we prepared flower-like CIS-graphene hybrid (GCIS). Electrochemical tests displayed advantage of graphene with better electron conductivity, and HRP/GCIS showed higher photoelectrochemical behavior.

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