Affiliation:
1. MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 China
2. College of Chemistry Jilin University Changchun 130012 China
3. Zhengzhou Research Institute Harbin Institute of Technology Zhengzhou 450000 China
Abstract
AbstractIn this work, cyano contained g‐C3N4 comodified by In2S3 and polypyrrole (C≡N─CN/IS/Ppy) materials are synthesized for the photocatalytic production of H2O2 and photocatalysis‐self‐Fenton reaction for highly efficient degradation of metronidazole. The results from UV–vis spectrophotometry, surface photovoltage, and Kelvin probe measurements reveal the promoted transport and separation efficiency of photoinduced charges after the introduction of In2S3 and Ppy in the heterojunction. The existence of a built‐in electric field accelerates the photoinduced charge separation and preserves the stronger oxidation ability of holes at the valence band of C≡N─CN. Linear sweep voltammetry measurements, zeta potential analyzations, nitroblue tetrazolium determination, and other measurements show that Ppy improves the conversion ratio of •O2− to H2O2 and the utilization ratio of •O2−, as well as suppresses decomposition of H2O2. Accordingly, the H2O2 evolution rate produced via a two‐step single‐electron reduction reaction reaches almost 895 µmol L−1 h−1, a value 80% and 7.2‐fold higher than those obtained with C≡N─CN/IS and C≡N─CN, respectively. The metronidazole removal rate obtained via photocatalysis‐self‐Fenton reaction attains 83.7% within 120 minutes, a value much higher than that recorded by the traditional Fenton method. Overall, the proposed synthesis materials and route look promising for the H2O2 production and organic pollutants degradation.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry