Fabrication of CdTe QDs/BiOI-Promoted TiO2 Hollow Microspheres with Superior Photocatalytic Performance Under Simulated Sunlight

Nanoscale Research Letters

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[1] 0000 0001 2229 7077, grid.412610.0, College of Materials Science and Engineering, Qingdao University of Science and Technology, Zhengzhou Road 53, 266042, Qingdao, China;Ansteel Cold Rolling (PuTian) Co., Ltd., Wangshan East Road 555, 351100, Putian, China;

关键词: Photocatalysis;    Ternary heterojunctions;    CdTe quantum dots;    TiO hollow microspheres;   

DOI  :  10.1186/s11671-019-2878-1

来源: publisher

【 摘 要 】

Hollow and heterostructured architectures are recognized as an effective approach to improve photocatalytic performance. In this work, ternary TiO2/CdTe/BiOI with hollow structure was constructed via a step-by-step method. In addition, the effect of TiO2 structural regulation and the energy band alignment of BiOI and CdTe quantum dots (CdTe QDs) with TiO2 in TiO2/CdTe/BiOI on photocatalytic dye removal were also studied. The results reveal that the TiO2/CdTe/BiOI heterostructures with hollow substrates exhibit much higher photocatalytic activities than pure TiO2, P25, TiO2/CdTe, and TiO2/BiOI and ternary TiO2/CdTe/BiOI with solid substrates. For TiO2(H)/CdTe/BiOI, several synergistic factors may be responsible for the remarkable visible-light photodegradation performance, such as strong visible-light absorption by BiOI and larger specific surface area.

【 授权许可】

CC BY