Synthesis of CdS/BiOBr nanosheets composites with efficient visible-light photocatalytic activity

被引:68
作者
Cui, Haojie [1 ]
Zhou, Yawen [2 ]
Mei, Jinfeng [2 ]
Li, Zhongyu [1 ,2 ]
Xu, Song [2 ]
Yao, Chao [2 ]
机构
[1] Changzhou Univ, Sch Environm & Safety Engn, Changzhou 213164, Peoples R China
[2] Changzhou Univ, Jiangsu Key Lab Adv Catalyt Mat & Technol, Sch Petrochem Engn, Changzhou 213164, Peoples R China
关键词
Photocatalytic activity; Visible-light photocatalysis; CdS/BiOBr composites; Dye photodegradation; H-2; EVOLUTION; BIOBR NANOSHEETS; EXPOSED; 001; NANOCOMPOSITES; PERFORMANCE; DYE; NANOSTRUCTURES; TEMPERATURE; IRRADIATION; FACETS;
D O I
10.1016/j.jpcs.2017.09.011
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The efficient charge separation action and visible-light responding could enhance the photocatalytic property of photocatalysts. In the present study, novel CdS/BiOBr nanosheets composites were synthesized by a three-step process. The as-prepared samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (FE-SEM), diffuse reflection spectroscopy (DRS), Raman spectroscopy and photoluminescence (PL). Under visible-light irradiation, the as-prepared CdS nanoparticles decorated BiOBr nanosheets exhibited the excellent photocatalytic activity and high stability for malachite green (MG) degradation. The photodegradation achieved maximum degradation efficiency (99%) using CdS/BiOBr-3 composites as photocatalyst. Furthermore, the possible photocatalytic mechanism upon CdS/BiOBr composites was also discussed through radical and holes trapping experiments. The heterostructure between CdS and BiOBr improved photocatalytic activity dramatically, which greatly promoted migration rate of the photoinduced electrons besides limiting the recombination of photogenerated electron-hole pairs.
引用
收藏
页码:80 / 87
页数:8
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