期刊
INORGANIC CHEMISTRY
卷 61, 期 29, 页码 11387-11398出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.2c01665
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资金
- National Natural Science Foundation of China [12002295]
- Postgraduate Scientific Research Innovation Project of Hunan Province [XDCX2022Y096]
- Scientific Research Fund of Hunan Provincial Education Department [20A480]
- Natural Science Foundation of Hunan Province [2020JJ4575]
A novel 3D network rodlike Ag2S/Bi2SiO5 photocatalyst with a p-n heterostructure was prepared using an anionic self-regulation strategy. The optimal composite exhibited excellent reduction activity for Cr(VI) in wastewater under visible light. The p-n heterostructure facilitated efficient transfer and separation of electron-hole pairs.
A novel three-dimensional (3D) network rodlike Ag2S/ Bi2SiO5 photocatalyst with a p-n heterostructure composed of ultrafine Ag2S nanoparticles (NPs) and Bi2SiO5 nanosheets was prepared using an anionic self-regulation strategy by a two-step hydrothermal process. The architecture facilitated the efficient transfer and separation of photogenerated electron-hole pairs. The optimal Ag2S/Bi2SiO5 composite (ABSO0.10) exhibited an excellent reduction activity (93.5% Cr(VI) removal in wastewater containing 50 mg center dot L-1 Cr(VI) within 90 min under visible light), which was about 11.2 and 25.6 times higher than that of the pristine Ag2S and virgin Bi2SiO5, respectively. Assisted by experiments and density functional theory (DFT) calculations, a possible photocatalytic mechanism for Cr(VI) reduction over the Ag2S/Bi2SiO5 composite under visible-light irradiation was proposed.
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