Bismuth-rich BiOBr/Bi24O31Br10/Ti3C2 polyheterojunction for visible photocatalytic degradation of dyes and Cr(VI) reduction and hydrogen production applications
Source abstract
Abstract
The construction of bismuth-rich heterostructures is an important strategy to improve the performance of bismuth-based visible photocatalytic materials. In this study, the binary heterojunction BiOBr/Bi 24O 31Br 10 (BOB) with efficient visible photocatalytic activity was constructed by in situ induced growth of Bi xO yBr z on the surface of BiOBr, and the multivariate heterojunction composite BiOBr/Bi 24O 31Br 10/Ti 3C 2 (BOBT) was synthesized by using Ti 3C 2 as an electron acceptor. It was shown that the solvothermal pH, Bi/Br and calcination temperature had a strong influence on the composition and crystalline structure of BOBT. The optimized synthesis conditions were pH=8, Bi/Br=1/1 (molar ratio), and calcination temperature of 400℃. The introduction of Mxene significantly enhanced the visible-light responsiveness and photoelectric efficiency of BOBT. The visible light-catalyzed degradation of complex conjugated systems containing aromatic and azo structures by BOBT was synchronously accompanied by benzene ring opening, demonstrating an efficient visible light degradation capability. BOBT has a reduced reduction current peak compared to BOB, can rapidly reduce Cr (VI), and improves the photocatalytic hydrogen production efficiency by nearly three times compared to BiOBr without the addition of Pt additives. This study provides fundamental data for the construction of efficient bismuth-based visible photocatalytic materials and their applications.
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Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Covalent Organic Framework Applications · Gas Sensing Nanomaterials and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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