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Photocatalytic mineralization of carbendazim pesticide by a visible light active novel type-II Bi2S3/BiFeO3 heterojunction photocatalyst
Catalysis Communications ( IF 3.4 ) Pub Date : 2018-06-19 , DOI: 10.1016/j.catcom.2018.06.018
Yagna Prakash Bhoi , Amit K. Nayak , Somesh K. Gouda , B.G. Mishra

In this study, an efficient photocatalytic route is developed for degradation of carbendazim fungicide under visible light irradiation using Bi2S3/BiFeO3 heterojunction materials as photocatalyst. The heterojunction system prepared by a two-step process contains rhombohedral BiFeO3 and orthorhombic Bi2S3 as crystalline phases. Morphologically, the Bi2S3/BiFeO3 materials contain BiFeO3 nanoplates and Bi2S3 nanorods in close microscopic contact. The Bi2S3/BiFeO3 materials exhibited improved visible light absorption, enhanced charge carrier separation and efficient photocatalytic activity achieving 96% degradation within 2 h of reaction. The mechanistic pathway for carbendazim degradation has been elucidated using GC-Mass analysis and radical scavenger experiments.



中文翻译:

可见光活性新型II型Bi 2 S 3 / BiFeO 3异质结光催化剂对多菌灵农药的光催化成矿作用

在这项研究中,开发了一种有效的光催化路线,以Bi 2 S 3 / BiFeO 3异质结材料为光催化剂在可见光照射下降解多菌灵杀菌剂。通过两步法制备的异质结体系包含菱形BiFeO 3和正交晶体Bi 2 S 3作为结晶相。在形态上,Bi 2 S 3 / BiFeO 3材料包含紧密微观接触的BiFeO 3纳米板和Bi 2 S 3纳米棒。Bi 2 S 3 / BiFeO 3材料显示出改善的可见光吸收,增强的电荷载流子分离和有效的光催化活性,可在反应2小时内实现96%的降解。使用GC-Mass分析和自由基清除剂实验已经阐明了多菌灵降解的机理。

更新日期:2018-06-19
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