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Material Sciences 2022
过硫酸盐辅助不同形貌的溴氧铋光催化降解卡马西平
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Abstract:
通过X射线粉末衍射(XRD)、扫描电镜(SEM)和物理吸附仪表征发现采用溶剂热法在不同溶剂中合成了不同形貌的BiOBr样品，且溶剂对BiOBr的比表面积有一定影响。活性测试结果表明，与样品直接光催化效果相比，过二硫酸盐(PDS)存在时样品光催化降解卡马西平(CBZ)具有更大的优势。紫外–可见漫反射光谱(DRS)和荧光光谱(PL)结果表明，优异的光响应能力和光生电子空穴分离性能有利于提升PDS辅助BiOBr光催化降解CBZ的活性。循环实验结果表明性能最优的BiOBr样品具有较好的循环使用和稳定性能。
The results of Powder X-ray diffraction (XRD), scanning electron mi-croscopy (SEM) and physical adsorption apparatus showed that BiOBr samples with different mor-phologies were synthesized by solvothermal methods in various solvents, and the solvents also had certain effects on specific surface area of BiOBr. It was found in experiments that the photocatalytic degradation of carbamazepine (CBZ) by BiOBr samples in the presence of peroxydisulfate (PDS) ac-tivation under visible light exhibited better activity compared with the direct photocatalytic activi-ty. UV-vis diffuse reflectance spectroscopy (DRS) and fluorescence spectroscopy (PL) implied that excellent light response and photogenerated electron hole separation performance were conducive to enhancing PDS assisted BiOBr-based photocatalytic performance for CBZ degradation. Cycling experiments indicated that the BiOBr sample which possessed the best CBZ degradation activity among all samples had relatively excellent recyclability and stability.
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