期刊
INORGANIC CHEMISTRY COMMUNICATIONS
卷 146, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.inoche.2022.110167
关键词
Heterostructure; Photocatalysis; Formaldehyde; Dyes; p -n junction
资金
- National Key Research and Development Program of China [2018YFD1101001]
- Natural Science Foundation of Jilin Province [20210101138JC]
- Science and technology research project of Jilin Provincial Department of Education [JJKH20220264KJ]
- Jilin Jianzhu University Scientific Research startup fund
- Innovation and entrepreneurship training program for college students of Jilin Jianzhu University [s202110191056]
- Jilin Province Science and Technology Development Plan Project [20210203114SF]
A nano flower-like p-n heterojunction photocatalyst BiOBr/TiO2 was prepared with enhanced photocatalytic activity for degrading Methyl Orange and gaseous formaldehyde. The narrow band gap p-type BiOBr improves visible light absorption, while its p-n heterojunction with TiO2 significantly enhances separation efficiency of photogenerated electron hole pairs. The multi-dimensional nanoflower structure not only improves light utilization but also exposes more catalytic active sites.
The fabrication of p-n heterojunction is a smart strategy to improve the photocatalytic activity, because p-n junction can effectively promote the separation of photogenerated charges and improve the photocatalytic performance. Herein, a low cost nanoflower-like p-n heterojunction photocatalyst BiOBr/TiO2 (abbreviated as BT-x) was prepared by simple solution coprecipitation method. Under visible light, BiOBr/TiO2 p-n hetero-junction photocatalyst showed enhanced photocatalytic activity in the degradation of Methyl Orange (MO) and gaseous formaldehyde (HCHO). The degradation rates of MO and HCHO by optimized composite BT-0.6 were 97% and 60% respectively. The p-type BiOBr with narrow band gap can effectively improve the visible light absorption, and its p-n heterojunction with TiO2 can significantly improve the separation efficiency and transfer rate of photogenerated electron hole pairs. Meanwhile, multi-dimensional nanoflower structure is not only conducive to light reflection and improve light utilization, but also can expose more catalytic active sites. This p -n heterojunction composite material can be used as a new and promising catalyst for environmental applications.
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