Fabrication of visible-light-response face-contact ZnSnO3@g-C3N4 core–shell heterojunction for highly efficient photocatalytic degradation of tetracycline contaminant and mechanism insight
2021
Zhu, Xiufeng | Guo, Feng | Pan, Jingjing | Sun, Haoran | Gao, Lingling | Deng, Jingxiao | Zhu, Xunyi | Shi, Weilong
The large-scale consumption and discharge of antibiotic tetracycline (TC) urge us to search for a highly efficient and eco-friendly technology to remove it. In this work, face-contact ZnSnO₃@g-C₃N₄ core–shell heterojunction was successfully constructed via one-step calcination route. The experimental data indicate that the photocatalytic TC removal performance of ZnSnO₃@g-C₃N₄ (1:3) reaches 90.8% within 120 min under the same condition compared with bulk g-C₃N₄ (32% degradation) and ZnSnO₃ (9% degradation). The improved photocatalytic activity is ascribed to the formation of core–shell structure between ZnSnO₃ and g-C₃N₄ which not only enlarges visible light response but also effectively separates electron–hole pairs. Meanwhile, this face-contact ZSO-CN photocatalyst displays much more contact interfaces than the point-contact ZSO-CN photocatalyst, and the contact interfaces could play the part of efficient channels for charge transfer. Finally, the photocatalytic reaction mechanism on ZnSnO₃@g-C₃N₄ was also stated at length through active species capture and electron spin resonance (ESR) tests. And the possible intermediates products were discussed through the liquid chromatography–mass spectrometry (LC–MS) analysis.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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