光催化
纳米片
降级(电信)
纳米复合材料
可见光谱
异质结
材料科学
复合数
化学工程
电子顺磁共振
四环素
光化学
纳米技术
化学
复合材料
催化作用
有机化学
光电子学
电信
生物化学
物理
工程类
核磁共振
抗生素
计算机科学
作者
Jia Wang,Gaoke Zhang,Jun Li,Kai Wang
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2018-09-20
卷期号:6 (11): 14221-14229
被引量:121
标识
DOI:10.1021/acssuschemeng.8b02869
摘要
Fabricating p–n heterojunction structure is an effective approach to improve the separation efficiency of carriers in photocatalysts for degradation of organic pollutants. Herein, a novel 3D p–n heterostructured BiOBr/Bi2SiO5 nanosheet composite is fabricated successfully. The obtained BiOBr/Bi2SiO5 nanosheet composites exhibit higher visible-light photocatalytic efficiency for degrading tetracycline (TC), which is 3.6 times higher than BiOBr. Furthermore, the composite could still maintain good activity for photocatalytic degradation of TC after five recycles. The active species in the photocatalytic system are •OH, •O2–, and h+, which are proved by trapping experiments and electron spin resonance (ESR) analysis. We demonstrate that the enhanced photocatalytic activity of BiOBr/Bi2SiO5 nanocomposites is due to the formation of p–n junction, which supports the generation of •O2– and •OH. The photocatalytic mechanism of BiOBr/Bi2SiO5 composites for the degradation of TC is also proposed.
科研通智能强力驱动
Strongly Powered by AbleSci AI