Chinese Journal of Catalysis ›› 2024, Vol. 62: 277-286.DOI: 10.1016/S1872-2067(24)60058-6

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Synergy of charge migration direction-manipulated Z-scheme heterojunction of BiVO4 quantum dots/perylenetetracarboxylic acid and nanosized Au modification for artificial H2O2 photosynthesis

Teng Liang, Yutong Li, Shuai Xu, Yuxin Yao, Rongping Xu, Ji Bian*(), Ziqing Zhang*(), Liqiang Jing*()   

  1. Key Laboratory of Functional Inorganic Materials Chemistry (Ministry of Education), School of Chemistry and Materials Science, International Joint Research Center for Catalytic Technology, Heilongjiang University, Harbin 150080, Heilongjiang, China
  • Received:2024-04-10 Accepted:2024-05-22 Online:2024-07-18 Published:2024-07-10
  • Contact: E-mail: bianji@hlju.edu.cn (J. Bian), zhangzq@hlju.edu.cn (Z. Zhang), jinglq@hlju.edu.cn (L. Jing).
  • Supported by:
    National Natural Science Foundation of China(U2102211);National Natural Science Foundation of China(22105066);National Natural Science Foundation of China(22202064);National Natural Science Foundation of China(U23A20576);Outstanding Youth Science Foundation of Heilongjiang Province(YQ2022B009);Outstanding Youth Science Foundation of Heilongjiang Province(YQ2023B008)

Abstract:

Herein, perylenetetracarboxylic acid (PTA) nanosheets with anisotropic charge migration driven by the formed internal electric fields are synthesized through a facile hydrolysis-reassembly process. Strategically, a Z-scheme heterojunction with free-flowing interfacial charge transfer and spatially separated redox centers is constructed based on the distinct photogenerated electrons and holes accumulation regions of PTA nanosheets by in-situ introducing BiVO4 quantum dots (BQD) and nanosized Au. The optimized BQD/PTA-Au exhibits a ca. 6.4-fold and 4.8-fold enhancement in H2O2 production rate and apparent quantum yield at 405 nm compared with pristine PTA, respectively. The exceptional activities are attributed to the cascade Z-scheme charge transfer followed the matched charge migration orientation, as well as the Au active sites for accelerating 2e oxygen reduction pathway induced by superoxide radicals, as unraveled by electron paramagnetic resonance, in-situ irradiated X-ray photoelectron spectroscopy and in-situ diffuse reflectance infrared Fourier transformation spectroscopy. This work provides a strategy to design an efficient Z-scheme system towards solar-driven H2O2 production.

Key words: Z-scheme heterojunction, Perylenetetracarboxylic acid, BiVO4 quantum dots, H2O2 photosynthesis, Oxygen reduction<br