A visible light driven 3D hierarchical CoTiO3/BiOBr direct Z-scheme heterostructure with enhanced photocatalytic degradation performance

被引：17
作者：
Wang, Lijie [1 ,2 ]
Li, Qiang [1 ,2 ]
Lu, Xiaoxiao [1 ,2 ]
Tian, Zhenfei [1 ,2 ]
He, Shiwu [1 ,2 ]
Zhang, Jinfeng [1 ,2 ]
机构：
[1] Huaibei Normal Univ, Coll Phys & Elect Informat, Huaibei 235000, Peoples R China
[2] Huaibei Normal Univ, Anhui Prov Key Lab Pollutant Sensit Mat & Environ, Huaibei 235000, Peoples R China
来源：
NEW JOURNAL OF CHEMISTRY | 2021年 / 46卷 / 01期
基金：
中国国家自然科学基金;
关键词：
HOLLOW MICROSPHERES; ORGANIC POLLUTANTS; OXYGEN VACANCIES; H-2; EVOLUTION; RHODAMINE-B; HETEROJUNCTION; FABRICATION; COMPOSITE; NANOPARTICLES; COMPLEX;
D O I：
10.1039/d1nj04252a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A series of novel three-dimensional (3D) CoTiO3/BiOBr (CTBB) hierarchical heterostructures were prepared via a simple hydrothermal method. In comparison with pure CoTiO3 and BiOBr, all the CTBB nanocomposites display enhanced photocatalytic performance toward dye decomposition. Particularly, CTBB-5 reveals the best photocatalytic efficiency for RhB removal with a K of 0.2030 min(-1), which is about 50.75 and 3.02-fold higher than that of pure CoTiO3 and BiOBr, respectively. The outstanding activity is further demonstrated by MO photodegradation. The dramatically enhanced activity can be attributed to the increased surface area and reduced recombination probability of charge carriers. Furthermore, CTBB-5 exhibits excellent stability after repetitively running four times. The h(+) and O-2(-) are identified as the dominating reactive species contributing to the oxidation reaction. Finally, a possible Z-scheme charge transfer mechanism is presented and analyzed in detail.
引用
收藏
页码：124 / 135
页数：12
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