In-situ synthesis of 3D microsphere-like In2S3/InVO4 heterojunction with efficient photocatalytic activity for tetracycline degradation under visible light irradiation
In-situ synthesis of 3D microsphere-like In2S3/InVO4 heterojunction with efficient photocatalytic activity for tetracycline degradation under visible light irradiation
复制标题
原位合成3D微球状In2S3/InVO4异质结，具有高效光催化活性，可在可见光照射下降解四环素
DOI：
10.1016/j.cej.2018.09.079
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发表时间：
2019
影响因子：
15.1
通讯作者：
Guangming Zeng
中科院分区：
文献类型：
--
作者：
Xingzhong Yuan;Longbo Jiang;Jie Liang;Yang Pan;Jin Zhang;Hou Wang;Lijian Leng;Zhibin Wu;Renpeng Guan;Guangming Zeng
半导体异质结构在光催化降解抗生素污染物方面引起了广泛的兴趣。在本研究中，通过一种简单的原位阴离子交换方法，将预先合成的InVO 4微球与Na 2S在水溶液中反应，制备了一种新型的In 2S 3/InVO 4异质结。采用XRD、SEM、EDS、TEM、XPS、N2吸附-脱附、UV-Vis吸收光谱、PL、光电流和电化学阻抗谱等手段对样品的结构、形貌和光学性能进行了表征。由于In 2S 3/InVO 4微球的可见光响应增强和异质结构的形成，其在可见光照射下对四环素（TC）的降解具有显著的光催化性能。In 2S 3/InVO 4复合材料的最佳光催化效率分别是In 2S 3和InVO 4的2.26和11.71倍。它还表现出显着的稳定性和重复性。自由基捕获实验和电子自旋共振结果表明，反应体系中的主要活性物种为h+和自由基dotO 2-，自由基dotOH的作用可以忽略。并提出了详细的光催化机理。
Semiconductor heterostructures have attracted extensive interest in photocatalytic degradation of antibiotic pollutants. In this study, a novel In2S3/InVO4heterojunction was prepared via a simple in-situ anion exchange method by reacting pre-synthesized InVO4microspheres with Na2S in an aqueous solution. The structures, morphologies and optical properties of the as-prepared samples were well characterized by XRD, SEM, EDS, TEM, XPS, N2adsorption–desorption, UV–Vis absorption spectra, PL, photocurrent and electrochemical impedance spectroscopy. Benefiting from the enlarged visible light response and the formation of heterostructure, the as-prepared In2S3/InVO4microspheres exhibit significantly promoted photocatalytic performance for the degradation of tetracycline (TC) under visible-light illumination. The optimum photocatalytic efficiency of In2S3/InVO4composite was almost 2.26 and 11.71 times higher than that of In2S3and InVO4, respectively. It also exhibited remarkable stability and repeatability. Radical trapping experiment and electron spin resonance results indicate that h+andradical dotO2−are the main active species in the reaction system, and the role ofradical dotOH can be ignored. The detailed photocatalytic mechanism is also proposed.