Liu Jin-Peng, Fu Yun-Xuan, Wang Ze-Hong, Ma Xiao-Ye, Wu Xiang-Feng, Li Hong-Yang, Kang Ye-Wei, Wang Hui, Ci Li-Jie
School of Materials Science and Engineering, Hebei Key Laboratory of Advanced Materials for Transportation Engineering and Environment, Shijiazhuang Tiedao University, Shijiazhuang, 050043 China.
Tianjin Key Laboratory of Building Green Functional Materials, Tianjin Chengjian University, Tianjin, 300384 China.
Appl Phys A Mater Sci Process. 2022;128(12):1065. doi: 10.1007/s00339-022-06228-y. Epub 2022 Nov 14.
Recently, the problem of water pollution, caused by antibiotics, is becoming more and more serious. Photocatalysis is one of the promising technologies for removing antibiotics from water. Herein, the InS/TiC composites were prepared by an in-situ hydrothermal growth method for photocatalytic degradation of tetracycline (TC). The as-developed composites were characterized by various methods. The UV-Vis DRS spectra reveals that the introduction of TiC makes the bandgap of the as-prepared composites smaller and the visible light absorption ability improved. The photocatalytic degradation efficiency of the as-prepared composite is enhanced under visible light illumination. It is shown as first increasing and then decreasing with increasing the content of TiC in the composite and reaches to the maximum of 89.3% in 90 min, which is higher than 75.1% of InS and 6.7% of TiC. The reason of improvement is the interface between InS and TiC is tightly combined to form a heterojunction. Moreover, the photocurrent intensity of the as-obtained composite is improved, while its Nyquist arc radius is decreased. In addition, holes are the main active species and ·OH and ·O play an auxiliary role during the degradation of TC.
近年来，由抗生素引起的水污染问题日益严重。光催化是一种很有前景的从水中去除抗生素的技术。在此，通过原位水热生长法制备了InS/TiC复合材料用于光催化降解四环素（TC）。采用多种方法对所制备的复合材料进行了表征。紫外可见漫反射光谱表明，TiC的引入使所制备复合材料的带隙变小，可见光吸收能力提高。所制备的复合材料在可见光照射下光催化降解效率提高。随着复合材料中TiC含量的增加，其光催化降解效率先升高后降低，在90分钟内达到最大值89.3%，高于InS的75.1%和TiC的6.7%。性能提高的原因是InS与TiC之间的界面紧密结合形成了异质结。此外，所制备复合材料的光电流强度提高，而其奈奎斯特弧半径减小。另外，在TC降解过程中，空穴是主要活性物种，·OH和·O起辅助作用。
