Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)
DOI: https://doi.org/10.29363/nanoge.nfm.2022.017
Publication date: 11th July 2022
Photoelectrocatalytic hydrogen evolution from water is a promising topic for producing H2 efficiently and environmentally friendly. However, the efficiency of hydrogen production in these photoelectrocatalysis systems is still low. Therefore, the discovery of more efficient phototelectrocatalysts has been considered as one of the important directions in the field of clean and renewable energy. 2D BiOBr is emerging as an interesting photoelectrocatalysts because of its unique internal electric field and band structure that facilitate the separation and mobility of the charge carriers[1,2]. However, pure 2D BiOBr suffers from low catalytic efficiency and photocorrosion from the light source. In order to optimize the catalytic efficiency and stability of 2D BiOBr, a 2D BiOBr/MoS2 heterojunctions with 1 wt%, 5 wt%, 10 wt% and 50 wt% of MoS2 were fabricated by a simple liquid-phase exfoliation method. Raman spectra prove the existence of strong interactions between the MoS2 and BiOBr 2D nanosheets in the heterojunctions. The heterojunction containing 1 wt% of MoS2 shows the best performance and stability in photoelectrocatalytic hydrogen evolution than the other samples. The calculation of the heterojuntions shows a better charge transfer inside the heterojunction than the pure 2D materials as well.
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