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- Title
La<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub>/Bi<sub>2</sub>Sn<sub>2</sub>O<sub>7</sub> heterostructure for photocatalytic degradation of tetracycline with the aid of hydrogen peroxide under visible light irradiation.
- Authors
Wang, Yao; Pan, Boyu; Li, Fan; Zhang, Liang; Wang, Kangkang; Xu, Bing; Shi, Wenxuan; Zhang, Shengnan; Jin, Lihua; Feng, Jianqing
- Abstract
Photocatalytic degradation technology serves as an environmental-friendly mean for the removal of organic pollutants in wastewater. La2Zr2O7/Bi2Sn2O7 (LZO/BSO, cata) composite photocatalysts have been successfully fabricated through the in-situ growth approach. The phase composition, microstructure and optical property of the materials have been examined. The results indicate that the "cata + H2O2 + vis" hybrid system exhibites the optimal photocatalytic performance in the photocatalytic degradation process of tetracycline (TC). Under this optimal condition, the degradation rate of TC reaches 90% after 70 min of visible light irradiation. And the apparent rate constant of the "cata + H2O2 + vis" system is obviously higher than those of "H2O2 + vis" and "cata + H2O2″ systems. The main active species have been confirmed to include ·O2−, h+ and ·OH in the degradation process of TC by the "cata + H2O2 + vis” system. The enhanced photocatalytic activity is achieved by improving the separation efficiency of charge carriers in heterojunction structure and producing more active species with the assistance of hydrogen peroxide. The effective Z-scheme-type heterojunction photocatalyst proposed in this study has the potential to be applied in the degradation of organic pollutants in wastewater.
- Publication
Journal of Materials Science: Materials in Electronics, 2024, Vol 35, Issue 24, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-024-13360-3