Control-Growth and Photocatalytic Activities of Low-Dimensional Bi2Fe4O9 Crystals  

低维Bi2Fe4O9晶体的控制生长及其光催化性能研究

作　　者：梁少伟 杨晴[1] 

机构地区：[1]中国科学技术大学化学系,合肥微尺度物质科学国家实验室(筹),合肥230026

出　　处：《Chinese Journal of Chemical Physics》2017年第5期566-570,I0002,共6页化学物理学报（英文）

基　　金：This work was supported by the National Natu-ral Science Foundation of China （No.21571166 and No.51271173） and the National Basic Research Pro- gram of China （No.2012CB922001）.

摘　　要：Low-dimensional Bi2Fe4O9 nanosheets and microrods have been selectively prepared by a solvothermal method, from which the growth of the Bi2Fe4O9 crystals can be controlled by the variation of reaction conditions. Structure determination showed that the nanosheets are mainly exposed by {001} facets while the microrods are exposed by {110} facets. Ab- sorption spectra revealed that there are two bandgaps observed for both nanosheets （at 1.9 and 1.55 eV） and microrods （1.7 and 1.45 eV）, and they both would be available for the sunlight photocatalysis e ciently due to the intensive absorption ability in a wide region. Photocatalytic investigation demonstrated that the overall photocatalytic performance of the microrods is prior to that of the nanosheets due to the variation of bandgaps and exposed facets. The present report provides a useful alternative strategy for the controlling growth of nanostructures and/or microcrystals besides the present demonstration of the Bi2Fe4O9 crystals with diflerent bandgaps and facets that would be able to tune the corresponding photocatalytic ability selectively.

关 键 词：Bi2Fe4O9  Nanosheet  Microrod  Control growth  Photocatalyst 

分 类 号：O[理学]