光催化
材料科学
苯酚
光电流
光化学
光致发光
电子顺磁共振
辐照
降级(电信)
降水
化学工程
催化作用
光电子学
有机化学
化学
核磁共振
工程类
气象学
核物理学
物理
电信
计算机科学
作者
Biyun Lin,Zhihong Chen,Lingling Shui,Guofu Zhou,Xin Wang
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2020-11-02
卷期号:32 (4): 045711-045711
被引量:16
标识
DOI:10.1088/1361-6528/abc113
摘要
A novel 2D/2D BiOBr/ultrathin metal-organic framework nanosheets (UMOFNs) direct Z-scheme photocatalyst was successfully synthesized by using a simple deposition-precipitation method. The photocatalytic performance was evaluated under light irradiation, which revealed that the 2D/2D BiOBr/UMOFNs Z-scheme photocatalyst exhibits higher photocatalytic degradation of phenol compared to pristine BiOBr and UMOFNs. A BiOBr/UMOFNs-40% (mass ratio for BiOBr and UMOFNs of 1:0.4) photocatalyst was found to show the best photocatalytic degradation efficiency and stability, reaching 99% phenol degradation under light irradiation of 270 min and maintaining 97% degradation after 5 recycling runs. Results obtained from a trapping experiment and electron paramagnetic resonance suggest that reactive ·OH and O2·- play a major role in phenol degradation. Photoluminescence and photocurrent results reveal that the excellent photocatalytic activity of the 2D/2D BiOBr/UMOFNs photocatalyst can be ascribed to the efficient separation of photogenerated electron-hole pairs through a direct Z-scheme system. This article provides a possible reference for designing Z-scheme photocatalysts by using MOFs and semiconductors for practical organic pollutant treatment.
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