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材料导报  2022, Vol. 36 Issue (13): 21010273-8    https://doi.org/10.11896/cldb.21010273
  无机非金属及其复合材料 |
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
县涛*, 高宇姝, 孙小锋, 邸丽景, 马俊, 周永杰
青海师范大学物理与电子信息工程学院,西宁 810008
Enhanced Photocatalytic Degradation and Reduction Activity of BiOBr Nanoplates by the Decoration of AuAg Alloy Nanoparticles
XIAN Tao*, GAO Yushu, SUN Xiaofeng, DI Lijing, MA Jun, ZHOU Yongjie
College of Physics and Electronic Information Engineering, Qinghai Normal University, Xining 810008, China
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摘要 采用水热法制备出BiOBr纳米片,并通过光还原法将Au、Ag和AuAg合金纳米颗粒修饰在BiOBr纳米片表面,获得Au/BiOBr、Ag/BiOBr和具有不同Au/Ag原子比的AuAg/BiOBr复合光催化剂。通过XPS、HRTEM和Mapping表征,充分证实贵金属纳米颗粒均匀地分布在BiOBr表面。利用紫外-可见光漫反射光谱观察到复合光催化剂中贵金属纳米颗粒的表面等离子体共振(SPR)效应。以染料(酸性橙7(AO7)和罗丹明B(RhB))以及Cr(Ⅵ)作为目标反应物,在模拟太阳光照射下对产物的光催化降解和还原性能进行了考察。结果表明:相比于BiOBr单体,Au/BiOBr、Ag/BiOBr和AuAg/BiOBr复合材料的光催化效率均得到提升,其中Au0.4Ag0.6/BiOBr复合物的光催化效果最佳。借助电化学和荧光光谱测试,证明在AuAg/BiOBr复合物中实现了光生电子和空穴的高效分离。光催化循环实验表明Au0.4Ag0.6/BiOBr复合物具有良好的光催化和结构稳定性。基于以上实验结果,提出了AuAg合金纳米颗粒对BiOBr纳米片光催化性能的改性机理。
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县涛
高宇姝
孙小锋
邸丽景
马俊
周永杰
关键词:  BiOBr  AuAg合金纳米颗粒  光催化  改性  降解    
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 Au0.4Ag0.6/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 Au0.4Ag0.6/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
出版日期:  2022-07-10      发布日期:  2022-07-12
ZTFLH:  TB383  
基金资助: 青海省自然科学基金(2021-ZJ-714);国家自然科学基金(51602170)
通讯作者:  * xiantao1985@126.com   
作者简介:  县涛,青海师范大学副教授。本科、硕士和博士均就读于兰州理工大学,2015年6月毕业于兰州理工大学,获得博士学位。主要研究方向为光催化材料。已在国内外重要期刊发表SCI论文40余篇,主持国家级和省部级项目5项。
引用本文:    
县涛, 高宇姝, 孙小锋, 邸丽景, 马俊, 周永杰. 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[J]. 材料导报, 2022, 36(13): 21010273-8.
XIAN Tao, GAO Yushu, SUN Xiaofeng, DI Lijing, MA Jun, ZHOU Yongjie. Enhanced Photocatalytic Degradation and Reduction Activity of BiOBr Nanoplates by the Decoration of AuAg Alloy Nanoparticles. Materials Reports, 2022, 36(13): 21010273-8.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.21010273  或          http://www.mater-rep.com/CN/Y2022/V36/I13/21010273
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