Enhanced Visible Light Photocatalytic Activity of Br-Doped Bismuth Oxide Formate Nanosheets
作者:Xin Feng、Wen Cui、Junbo Zhong、Xiaoying Liu、Fan Dong、Yuxin Zhang
DOI:10.3390/molecules201019189
日期:——
A facile method was developed to enhance the visible light photocatalytic activity of bismuth oxide formate (BiOCOOH) nanosheets via Br-doping. The as-prepared samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, the Brunauer–Emmett–Teller surface area, UV-vis diffuse reflectance spectroscopy, photoluminescence spectra, and N2 adsorption-desorption isotherms measurement. The Br− ions replaced the COOH− ions in the layers of BiOCOOH, result in a decreased layer distance. The photocatalytic activity of the as-prepared materials was evaluated by removal of NO in qir at ppb level. The results showed that the Br-doped BiOCOOH nanosheets showed enhanced visible light photocatalytic activtiy with a NO removal of 37.8%. The enhanced activity can be ascribed to the increased visible light absorption and the promoted charge separation.
通过Br掺杂,开发了一种简便的方法来提高有机酸铋氧化物(BiOCOOH)纳米片在可见光下的光催化活性。所制备的样品通过X射线衍射、扫描电子显微镜、透射电子显微镜、X射线光电子能谱、Brunauer-Emmett-Teller比表面积、紫外-可见漫反射光谱、光致发光光谱和氮气吸附-脱附等温线进行了表征。Br⁻离子替换了BiOCOOH层中的COOH⁻离子,导致层间距减小。通过在空气中的ppb级NO去除率评价了所制备材料的光催化活性。结果显示,Br掺杂的BiOCOOH纳米片在可见光下的光催化活性得到增强,NO去除率达到37.8%。活性的增强可归因于可见光吸收增加和电荷分离促进。