光催化
电子顺磁共振
材料科学
可见光谱
异质结
催化作用
热液循环
降级(电信)
光化学
化学工程
激进的
纳米技术
化学
光电子学
有机化学
工程类
物理
电信
核磁共振
计算机科学
作者
Meixuan Cai,Ruobai Li,Zhijie Xie,Jiaxing Huang,Yongqin Zeng,Qianxin Zhang,Haijin Liu,Wenying Lv,Guoguang Liu
标识
DOI:10.1016/j.apcatb.2019.118033
摘要
The development of novel noble metal-free semiconductor catalysts with high photocatalytic efficiency is of great importance toward the degradation of organic compounds. In this work, a core-shell heterojunction MoS2/Cd0.9Zn0.1S photocatalytic material was successfully synthesized via a simple one-step hydrothermal method. The introduction of MoS2 led to a significant improvement in the photocatalytic degradation of diclofenac (DCF). It was confirmed that 0.1% loading content of MoS2 achieved an optimal photocatalytic efficiency of 86% in the degradation of DCF under visible light irradiation, which was 1.8 times higher than that of Cd0.9Zn0.1S. The MoS2/Cd0.9Zn0.1S heterostructured composites possessed improved photocatalytic properties, which implied that the combination of Cd0.9Zn0.1S and MoS2 shortened the carrier transport pathway and facilitated the separation efficiency of electrons and holes. Reactive species (RS) scavenging experiments and electron spin resonance (ESR) demonstrated that superoxide radicals (O2•−) and electron holes (h+) played predominant roles throughout the DCF degradation process. The primary intermediates were explored through HRAM LC/MS/MS, and a transformation pathway was tentatively proposed. This study promoted the application of an economical, highly efficient and visible light driven MoS2 co-catalyst for the degradation of organic contaminants.
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