期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 810, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.151919
关键词
Bi4NbO8Cl; Ag nanoparticles; SPR effect; Photocatalytic degradation
资金
- National Natural Science Foundation of China (NSFC) [61504073]
- Project of Shandong Province Higher Educational Science and Technology Program [J18KA011]
Layered perovskite oxyhalide Bi4NbO8Cl has been reported as a stable photocatalyst for the organic pollutant removal. In this work, Bi4NbO8Cl was synthesized using liquid-combustion approach, and an efficient Ag/Bi4NbO8Cl photocatalyst was prepared via photo-deposition method. Transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS) display that metallic Ag nanoparticles (similar to 10 nm) are uniformly distributed on the surface of Bi4NbO8Cl. Owing to a shift of the valence and conduction band and band-gap narrowing, demonstrated by UV-vis diffuse reflection spectroscopy (UV-vis DRS) and Mott-Schottky results, the Ag/Bi4NbO8Cl show enhanced photocatalytic degradation of RhB with almost 100% within 3 h. Photogenerated holes (h(+)) are foremost active specie responsible for the degradation of RhB via the capture agent test. The improvement of photocatalytic performance of 3% Ag/Bi4NbO8Cl could be attributed to the synergetic effect of the surface plasmon resonance and electron sinkers by Ag nanoparticles, strengthening the visible-light absorption ability, as well as promoting the separation efficiency of charge carriers, which are beneficial for enhancing photocatalytic performance. The present work provides a promising insight into the design Bi-based photocatalysts to solve environmental pollution. (C) 2019 Elsevier B.V. All rights reserved.
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