期刊
INORGANIC CHEMISTRY COMMUNICATIONS
卷 137, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.inoche.2022.109254
关键词
BiOBr; AgBr; Heterojunctions; Photocatalytic performance; RhB
资金
- National Natural Science Foundation of China [21777168]
- Sichuan University of Science and Engineering [2021RC26]
In this work, Ag/AgBr/BiOBr heterostructures were in-situ built by precipitation method, which can promote the separation of photoactivated carriers and enhance photocatalytic activity. The heterostructures prepared with a molar ratio of 2% AgBr/BiOBr showed the highest photocatalytic activity, being 2-fold of that of BiOBr, and exhibited outstanding stability. The mechanism for separation and transfer of photoexcited carriers was elucidated based on experimental results.
Construction of heterostructures is a valid channel to tune the activity of the photocatalyst. In this work, Ag/AgBr/BiOBr heterostructures were in-situ built by a precipitation method. The constructed heterojunctions were carefully characterized by some analytic methods. The characterization results show that construction of heterojunctions can promote the separation of photoactivated carriers. Rhodamine B (RhB) was used to evaluate photocatalytic activity under simulated sunlight. When the molar ratio of AgBr/BiOBr is 2%, the heterostructures prepared possess the highest photocatalytic activities. Photocatalytic activity of the 2% sample is 2-fold of that of BiOBr. Moreover, the sample has outstanding stability. In view of the experimental results, a mechanism for separation and transfer of photoexcited carriers was elaborated.
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