High-Efficient Visible-Light Photocatalysis Performance and Light-Corrosion Resistance of Ag3PO4 Constructed by double-Z System Composites

• Published in: Bulletin of environmental contamination and toxicology Vol. 109; no. 6; pp. 1167 - 1174
• Main Authors: Wang, Wenran, Yu, Xueru, Zhang, Yutong, Huang, Liuqing, Wang, Hongyi, Gu, Cheng, Chen, Zhanghao
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.12.2022; Springer Nature B.V
• Subjects: Anion exchanging; Aquatic Pollution; Catalytic activity; Corrosion resistance; Degradation; Earth and Environmental Science; Ecotoxicology; Electron paramagnetic resonance; Electron spin resonance; Environment; Environmental Chemistry; Environmental Health; Fabrication; Irradiation; Light; Light irradiation; Morphology; Phosphates; Photocatalysis; Photocatalysts; Photodegradation; Photoelectron spectroscopy; Photoelectrons; Pollution; Scanning electron microscopy; Self-assembly; Silver compounds; Soil Science & Conservation; Spectroscopy; Spectrum analysis; Toxicology; Waste Water Technology; Water Management; Water Pollution Control; X ray photoelectron spectroscopy; X-ray diffraction; AgI; Ag; AgBr; Visible light; Z-system; Photocatalyst; PO
• ISSN: 0007-4861; 1432-0800
• DOI: 10.1007/s00128-022-03629-w

Novel visible-light-driven Ag 3 PO 4 /AgBr/AgI photocatalysts were prepared via a simple self-assembly strategy combined with in-situ anion-exchanging process. The photocatalytic activity of Ag 3 PO 4 was significantly improved by constructing double-Z system. Specifically, the obtained materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and UV-vis diffuse reflectance spectroscopy (DRS). Under visible light irradiation (λ > 420 nm), the Ag 3 PO 4 /AgBr/AgI photocatalysts showed much higher photocatalytic activity than bulk Ag 3 PO 4 for the degradation of formaldehyde (HCHO), and 100% HCHO degradation could be obtained within 28 min. The degradation efficiency could be maintained in five cycles. Further electron paramagnetic resonance (ESR) tests demonstrated that both •OH and • O 2 − generated in the system. This study provides new insights into the fabrication of highly efficient visible-light-driven photocatalysts and facilitates their practical application in emerging environment issues.