Enhanced piezo-photocatalytic performance of HPMC connected MoS2/BiOBr for accelerating the degradation of organic pollutants

•HPMC connected MoS2/BiOBr composites are prepared by solvothermal method.•The heterojunctions enhance the separation efficiency of photogenerated carriers.•HPMC reduce the charge resistance in the heterojunction interface.•The polyhydric polymers have great potential in the construction of high cat...

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Bibliographic Details
Published in:Materials letters 2025-01, Vol.379, p.137393, Article 137393
Main Authors: Yao, Ziyu, Su, Zhizhong, Song, Jun, Gao, Xiang, Wang, Fang, Wang, Yupeng
Format: Article
Language:English
Subjects:
A. Heterojunction
B. Piezo-photocatalyst
C. HPMC connected
D. Solvothermal method
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Summary:•HPMC connected MoS2/BiOBr composites are prepared by solvothermal method.•The heterojunctions enhance the separation efficiency of photogenerated carriers.•HPMC reduce the charge resistance in the heterojunction interface.•The polyhydric polymers have great potential in the construction of high catalytic system. In this study, the novel HPMC connected MoS2/BiOBr piezo-photocatalyst is successfully prepared by solvothermal method. HPMC connected 3 % MoS2/BiOBr reveals ideal piezo-photocatalyic performance (99.9 %, 60 min), which is 4.05 times (reaction rate constant) of pure BiOBr. The enhanced catalytic ability is attributed to (i) the layered MoS2 with high conductivity can induce charge migration from BiOBr to MoS2, (ii) the strong viscous HPMC form close-knit heterojunction between MoS2 and BiOBr, thus accelerating the charge transfer process. This work offers a new method for the construction of efficient catalytic systems using polyhydric polymer materials.
ISSN:0167-577X
DOI:10.1016/j.matlet.2024.137393