首页|Novel p-n type polyimide aerogels/BiOBr heterojunction for visible light activated high efficient photocatalytic degradation of organic contaminants
Novel p-n type polyimide aerogels/BiOBr heterojunction for visible light activated high efficient photocatalytic degradation of organic contaminants
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NSTL
Elsevier
In this work, a novel p-n heterojunction polyimide aerogel/BiOBr (PI/BOB) photocatalyst was successfully synthesized by combining supercritical drying and in-situ precipitation method, to degrade organic pollutants in visible light. The synthesized PI/BOB photocatalysts exhibited excellent photocatalytic activity by establishing p-n heterojunction with improved charge separation and transfer performance. Moreover, the combination of BiOBr and PI can effectively reduce the hydrophobicity of PI and help to improve its application in water pollution treatment. After a comprehensive study of the microstructure and optical properties of PI/BiOBr heterojunction, it is found that the combination of PI and BiOBr nanosheets can expand the light absorption range, and the porous PI can greatly increase the specific surface area of PI/BiOBr heterojunctions. Furthermore, XPS results showed that the electron in PI transferred to BiOBr through the concentration differences, thus generating an internal electric field (IEF) between PI and BiOBr. Under the effect of IEF, photogenerated carriers can be separated between PI and BiOBr more efficiently, which can effectively improve the photocatalytic efficiency. Photocatalytic degradation experiments showed that PI/BOB has excellent photocatalytic degradation effect on RhB, and the degradation rate of 50 mg RhB was 99% in 60 min for 20 mg catalyst.
Xue L.、Cui B.、Hu Y.、Du Y.、Ji P.、Sun X.、Li Z.、Qu J.、Yang C.
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Key Laboratory of Processing and Testing Technology of Glass & Functional Ceramics of Shandong Province Qilu University of Technology (Shandong Academy of Science)
Library Qilu University of Technology (Shandong Academy of Science)
Wuxi Weifu Environment Catalysts Co. LTD
School of Materials Science and Engineering Shandong University of Technology
NSTL
Elsevier
