期刊
ENVIRONMENTAL TECHNOLOGY
卷 42, 期 3, 页码 377-387出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09593330.2019.1629183
关键词
Tetracycline; environment; efficient; photocatalysis; inverse opal-TiO2-CdS
资金
- National Natural Science Foundation of China [11804180]
- Doctoral Foundation of Natural Science Foundation of Shandong Province [ZR2017BEM013]
This work synthesized an efficient catalyst IO-TiO2-CdS for degrading tetracycline hydrochloride, which can degrade over 99% of 30 mg/L tetracycline within 20 minutes. The 3D ordered macroporous structure of IO-TiO2 improves light utilization, while the addition of CdS enhances charge carrier separation efficiency on the catalyst.
Tetracycline hydrochloride as an environmental pollutant is biologically toxic and highly difficult to degrade. To solve this problem, an efficient catalyst IO-TiO2-CdS composite with honeycomb-like three-dimensional (3D) inverse opal TiO2 (IO-TiO2) and cadmium sulphide (CdS) was synthesized and applied in the degradation of tetracycline hydrochloride in this paper. More than 99% of the tetracycline hydrochloride (30 mg/L) can be degraded by IO-TiO2-CdS (30 mg) within 20 min under visible light irradiation. Surprisingly, the naphthol rings can be opened and degraded to alkane with a minimum molecular weight of 60, which is the smallest fragment among all publications. The three-dimensional ordered macroporous (3DOM) structure of IO-TiO2 improves the utilization of light via the slow photon effect. Meanwhile, the addition of CdS enhances the degradation efficiency of tetracycline by broadening the range of absorption spectrum and improving the separation of charge carrier on the catalyst. In addition to the degradation of tetracycline hydrochloride, IO-TiO2-CdS also shows a good degradation efficiency of Rhodamine B (RhB). This work provides a promising approach to construct visible light response photocatalysts with non-noble metal for efficient degradation of wastewater pollutants.
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