Mechanism analysis of photocatalytic activity on Semiconductor-Type-Modulated heterojunctions

Jin, Yuehui; Jin, Minkun; Bai, Jiangwen; Li, Jiamin; Wu, Ziyang; Li, Zexun; Xiang, Jinmeng; Guo, Chongfeng

doi:10.1016/j.apsusc.2024.159683

Applied Surface Science

2024

DOI: 10.1016/j.apsusc.2024.159683

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Mechanism analysis of photocatalytic activity on Semiconductor-Type-Modulated heterojunctions

Yuehui Jin,

Minkun Jin,

Jiangwen Bai

et al.

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2024

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Tailoring Heterojunctions in CsPbBr_xCl_3−x−MoS₂ Composites for Efficient Photocatalysis and Hydrogen Evolution

Takhar,

Singh,

Dhakar

et al. 2024

ChemCatChem

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We demonstrate appropriate tuning of heterojunctions in CsPbBrxCl3‐x – MoS2 composites (where x=0,1,2,3) by controlled regulation of the halide stoichiometry in the perovskite. A thorough optimization procedure determined the most effective photocatalyst, considering the pristine MoS2, perovskites with varying halide ratios, various physical mixing ratios of the two, and in‐situ synthesized composite ratios of CsPbBrxCl3‐x and MoS2 (2:1, 1.5:1, 1:1, 1:1.5, 1:2). Under two hours of exposure to visible light, a remarkable photocatalytic performance of CsPbBrCl2:MoS2 with a 1:2 ratio was observed, removing 98% of the methylene blue (MB) dye. Notably, only the CsPbBrCl2 and MoS2 composite demonstrated higher efficiencies since it resulted in a n‐n type II heterojunction. Additionally, the CsPbBrCl2:MoS2 composite exhibits the highest reaction rate constant, fifteen times higher than the pristine perovskite. Reusability assessment of this combination revealed sustained activity of 87% for up to 5 cycles. The hydrogen evolution reaction investigations were carried out using the optimized CsPbBrCl2:MoS2 composite, which yielded 265 times more hydrogen than pristine CsPbBrCl2. The Faradaic efficiency for 1:2 CsPbBrCl2:MoS2 was found to be 96.61%. Our results offer crucial perspectives on optimizing perovskite‐MoS2 composites and demonstrate their utility in sustainable applications, including water treatment, renewable energy harvesting, and environmental remediation.

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Tailoring Heterojunctions in CsPbBr_xCl_3−x−MoS₂ Composites for Efficient Photocatalysis and Hydrogen Evolution

Takhar,

Singh,

Dhakar

et al. 2024

ChemCatChem

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show abstract

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Mechanism analysis of photocatalytic activity on Semiconductor-Type-Modulated heterojunctions

Cited by 1 publication

References 41 publications

Tailoring Heterojunctions in CsPbBr_xCl_3−x−MoS₂ Composites for Efficient Photocatalysis and Hydrogen Evolution

Tailoring Heterojunctions in CsPbBr_xCl_3−x−MoS₂ Composites for Efficient Photocatalysis and Hydrogen Evolution

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Mechanism analysis of photocatalytic activity on Semiconductor-Type-Modulated heterojunctions

Cited by 1 publication

References 41 publications

Tailoring Heterojunctions in CsPbBrxCl3−x−MoS2 Composites for Efficient Photocatalysis and Hydrogen Evolution

Tailoring Heterojunctions in CsPbBrxCl3−x−MoS2 Composites for Efficient Photocatalysis and Hydrogen Evolution

Contact Info

Product

Resources

About

Tailoring Heterojunctions in CsPbBr_xCl_3−x−MoS₂ Composites for Efficient Photocatalysis and Hydrogen Evolution

Tailoring Heterojunctions in CsPbBr_xCl_3−x−MoS₂ Composites for Efficient Photocatalysis and Hydrogen Evolution