修饰AuAg合金纳米颗粒对BiOBr纳米片光催化降解和还原性能的提高

doi:10.11896/cldb.21010273

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Abstract BiOBr nanoplates were prepared through the hydrothermal method, and then Au, Ag and AuAg alloy nanoparticles were decorated on the surface of BiOBr nanoplates by photoreduction route, leading to the formation of Au/BiOBr, Ag/BiOBr and AuAg/BiOBr composites with different Au/Ag atomic ratio. The XPS, HRTEM and Mapping characterization results show that the noble metal nanoparticles were uniformly distributed on the BiOBr nanoplates surface. The surface plasmon resonance (SPR) effect of noble metal nanoparticles was observed in the ultraviolet-visible diffuse reflectance spectra. Acid orange 7 (AO7), Rhodamine B (RhB) and Cr(Ⅵ) were selected as the target reactant, and then the photocatalytic degradation and reduction activity of products were evaluated under simulated sunlight irradiation. The experimental results indicate that the photocatalytic activity of Ag/BiOBr, Au/BiOBr and AuAg/BiOBr are much higher than that of BiOBr nanoplates. Among them, the Au_0.4Ag_0.6/BiOBr composite exhibits optimal photocatalytic efficiency. The efficient seperation of photogenerated electrons and holes in the AuAg/BiOBr composite was demonstrated by using electrochemical and fluorescence measurement. The photocataltyic cyclic experiment reveals that Au_0.4Ag_0.6/BiOBr composite has good photocatalytic and structural stability. Based on above results, the modification mechanism of AuAg alloy nanoparticles on the photocatalytic activity of BiOBr nanoplates was proposed.

Key words： BiOBr AuAg alloy nanoparticles photocatalysis modification degradation

Published: 10 July 2022 Online: 2022-07-12

CLC number:

TB383

Fund:Natural Science Foundation of Qinghai (2021-ZJ-714) and the National Natural Science Foundation of China (51602170).

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	XIAN Tao
	GAO Yushu
	SUN Xiaofeng
	DI Lijing
	MA Jun
	ZHOU Yongjie

Cite this article:

XIAN Tao,GAO Yushu,SUN Xiaofeng, et al. Enhanced Photocatalytic Degradation and Reduction Activity of BiOBr Nanoplates by the Decoration of AuAg Alloy Nanoparticles[J]. Materials Reports, 2022, 36(13): 21010273-8.

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http://www.mater-rep.com/EN/10.11896/cldb.21010273 OR http://www.mater-rep.com/EN/Y2022/V36/I13/21010273

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