One-pot synthesis of Bi2S3/Bi4O5Br2 S-scheme heterojunction hierarchical microbelts with enhanced photocatalytic activity in contaminant degradation
APPLIED SURFACE SCIENCE(2024)
Abstract
Constructing heterojunctions is an effective way to enhance photocatalytic activity of semiconductors and enlarging heterojunction interface area is a key point. Herein, one-dimensional Bi2S3/Bi4O5Br2 S-scheme heterojunction hierarchical microbelts were synthesized through a facile one-pot solvothermal method, using bismuth subsalicylate as the hard template. In the heterojunction microbelts, Bi2S3 nanoparticles are homogeneously dispersed in the Bi4O5Br2 matrix, which considerably enlarges the S-scheme heterojunction interface. These heterojunction hierarchical architectures can remarkably enhance photogenerated charge separation and thus photocatalytic activity of the Bi2S3/Bi4O5Br2 microbelts which, for example, exhibit a similar to 2.6, 113, and 2.0 times higher photodegradation efficiency toward salicylic acid than Bi4O5Br2, Bi2S3, and Bi4O5Br2 loaded superficially with Bi2S3, respectively. Especially, the Bi2S3/Bi4O5Br2 heterojunction microbelts also exhibits high photoactivity in tap water, river water, and lake water under natural solar irradiation. This work provides a simple way to construct Bi-based heterojunction hierarchical architectures with large heterojunction interface area.
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Key words
Bi2S3,Bi4O5Br2,Heterojunction,Photocatalytic,Degradation
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