光降解
光催化
罗丹明B
石墨氮化碳
可见光谱
材料科学
光化学
三元运算
纳米颗粒
纳米复合材料
激进的
化学工程
化学
催化作用
纳米技术
有机化学
计算机科学
工程类
程序设计语言
光电子学
作者
Sankeerthana Bellamkonda,G. Ranga Rao
标识
DOI:10.1016/j.cattod.2018.03.025
摘要
BiOCl/CdS/g-C3N4 heterostructure and related photcatalysts have been designed successfully by decorating the 2D organic graphitic carbon nitride (g-C3N4) and inorganic bismuth oxychloride (BiOCl) semiconductor nanosheets with cadmium sulphide (CdS) nanoparticles. We have employed solvothermal cum co-precipitation method to fabricate the photocatalysts. The morphologies, optical and electronic properties of the photocatalysts have been studied by spectroscopic and microscopic methods. The BiOCl/CdS/g-C3N4 photcatalyst shows remarkably high visible-light-driven photocatalytic activity for the degradation of rhodamine B (RhB) with first order rate constant of 0.09 min−1. The observed photodegradation activity is of the order, BiOCl/CdS/g-C3N4 > CdS/g-C3N4 > BiOCl/g-C3N4 > g-C3N4. Radical scavenging experiments show that superoxide radicals (O•−2) and holes (h+) are more active species in the photodegradation of RhB than hydroxyl radicals (O•H). This study reveals that morphology and synergic interactions of BiOCl and g-C3N4 nanosheets with CdS nanoparticles are crucial to separate the photogenerated electron-hole pairs and enhance the photocatalytic activity for RhB degradation.
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