Ma Zhanying, Li Xiaobo, Fan Guang, Deng Lingjuan, He Yangqing
Department of Chemistry, Xianyang Normal University, Xianyang, 712000, China.
Department of Applied Chemistry, Xi'an University of Technology, Xi'an, 710048, China.
Environ Sci Pollut Res Int. 2023 May;30(21):59737-59748. doi: 10.1007/s11356-023-26740-9. Epub 2023 Apr 4.
In this paper, MoS nanosheets were prepared and deposited on BiOBr microflowers through deposition-hydrothermal strategy. MoS exhibited a string of nanosheets with wrinkled layer outlook, and MoS/BiOBr composites displayed a micro-flower morphology with the diameter of 2-3 μm. Visible-light harvesting performance was significantly improved in the region of 400-600 nm for MoS/BiOBr. The obtained MoS/BiOBr samples exhibited tremendous enhanced catalytic activity, which could degrade 92.96% of tetracycline and 90.31% of levofloxacin within 70 min. The photo-generated holes and ⋅OH radicals played the dominant roles in the whole photocatalytic decomposition process. Based on the analysis of DRS, BET, PL, and electrochemical results, the remarkably improved photocatalytic performance may be ascribed to the synergistic effect of strong visible-light harvesting ability, enhanced BET surface area, and faster separation or transfer efficiency of photo-generated charges.
在本文中，通过沉积-水热策略制备了MoS纳米片并将其沉积在BiOBr微花上。MoS呈现出一串具有褶皱层外观的纳米片，且MoS/BiOBr复合材料呈现出直径为2-3μm的微花形态。对于MoS/BiOBr，在400-600nm区域内可见光捕获性能得到显著改善。所获得的MoS/BiOBr样品表现出极大增强的催化活性，其在70分钟内可降解92.96%的四环素和90.31%的左氧氟沙星。光生空穴和⋅OH自由基在整个光催化分解过程中起主导作用。基于DRS、BET、PL和电化学结果的分析，显著提高的光催化性能可能归因于强可见光捕获能力、增强的BET表面积以及光生电荷更快的分离或转移效率的协同效应。
