首页» News» The Research Team of the School of Science of Our School has Made Important Progress in the Field of Silver Bromide Photocatalysis

The Research Team of the School of Science of Our School has Made Important Progress in the Field of Silver Bromide Photocatalysis

Authors : | release date : 2021-06-18  |   browses a quantity : 次   [ close window ]

Recently, the team of Professor Wang Desong of the School of Science of our school has made important progress in the research of silver bromide visible light catalysis. The research results were published in the authoritative journal of catalysis, Journal of Catalysis, as "Improvement in photocatalytic stability of AgBr under visible light through melt processing". 2021, 400, 160-165 (https://doi.org/10.1016/j.jcat.2021.05.033). The first authors of the paper are Dr. Yandong Duan and Dr. Xuewang Zhu, and the corresponding authors are Prof. Qingzhi Luo and Prof. Desong Wang.


ed5a843d08f8454bbfe589b7d3ac7bbb.png


Silver bromide is an important photosensitive material. In the past ten years, silver bromide (AgBr) micro/nano crystals have been extensively studied due to its excellent photocatalytic activity. However, in the photocatalytic process of AgBr, elemental Ag is continuously generated on the surface, resulting in unstable chemical composition and photocatalytic activity, which has become a bottleneck restricting the further development and application of AgBr photocatalyst. After years of exploration, the research team prepared flaky AgBr large crystals (AgBr-MT) by melt-processing AgBr in a bromine atmosphere to adjust its surface chemical composition, which not only gave it excellent photocatalytic activity, but also improved its photocatalytic stability by orders of magnitude. The self-recovery phenomenon of AgBr photocatalytic performance after photoetching was realized for the first time. The study found that the melting treatment greatly reduced the unstable silver ions at the top and edge of the flaky AgBr crystal; at the same time, the surface reconstruction under the action of bromine molecules also helped to improve the photocatalytic stability of AgBr. The improvement of AgBr photocatalytic stability and the regeneration of photocatalytic activity provide a technical way for the practical application of AgBr photocatalyst. The research was supported by the National Natural Science Foundation of China and other projects.


b7d674226fd0448e8d0f14402b5b2a78.png

1047d03ada9d4afc97b3587ec58af5a1.png