超声辅助原位制备具有增强光催化性能的BiOBr修饰BiOCO微观结构
Ultrasonic-assisted in-situ fabrication of BiOBr modified BiOCO microstructure with enhanced photocatalytic performance.
作者信息
Cheng Lijun, Hu Xumin, Hao Liang
机构信息
Tianjin Key Laboratory of Integrated Design and On-line Monitoring for Light Industry & Food Machinery and Equipment, College of Mechanical Engineering, Tianjin University of Science & Technology, 300222, China.
Tianjin Key Laboratory of Integrated Design and On-line Monitoring for Light Industry & Food Machinery and Equipment, College of Mechanical Engineering, Tianjin University of Science & Technology, 300222, China.
出版信息
Ultrason Sonochem. 2018 Jun;44:137-145. doi: 10.1016/j.ultsonch.2018.02.023. Epub 2018 Feb 12.
Via an ultrasonic-assisted in-situ etching method, BiOBr modified BiOCO microstructures were fabricated in short time. The samples were characterized by XRD, SEM, TEM, BET, UV-Vis, XPS and PL spectra methods. Rhodamine B (RhB) aqueous solution was applied to evaluate the photocatalytic activities of the as-prepared samples. The results showed that the sample prepared at pH of 2 in which the molar ratio of BiOBr and BiOCO was 0.69:1 had the largest specific surface area, the best utilization for ultraviolet and visible light and efficient separation efficiency of charge carriers, contributing to its best photocatalytic activity. O was proved to be main active species in RhB photodegradation process. Last, the photocatalytic mechanism of the composite was discussed in detail.
通过超声辅助原位蚀刻法，在短时间内制备了BiOBr修饰的BiOCO微结构。采用XRD、SEM、TEM、BET、UV-Vis、XPS和PL光谱方法对样品进行了表征。以罗丹明B（RhB）水溶液评价所制备样品的光催化活性。结果表明，在pH为2时制备的样品中BiOBr与BiOCO的摩尔比为0.69:1，具有最大的比表面积、对紫外光和可见光的最佳利用率以及电荷载流子的高效分离效率，从而使其具有最佳的光催化活性。O被证明是RhB光降解过程中的主要活性物种。最后，详细讨论了该复合材料的光催化机理。
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