In situ growth of Cs3Bi2Br9 on ultrathin BiVO4 nanosheets to fabricate heterojunction intimate interfaces for enhancing photocatalytic activity

Gao, Yingdan; Guo, Yurong; Zhao, Guangjiu

doi:10.1039/d3tc04216b

J. Mater. Chem. C

2024

DOI: 10.1039/d3tc04216b

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In situ growth of Cs₃Bi₂Br₉ on ultrathin BiVO₄ nanosheets to fabricate heterojunction intimate interfaces for enhancing photocatalytic activity

Yingdan Gao,

Yurong Guo,

Guangjiu Zhao

Abstract: Lead-free halide perovskites have emerged as a potential green photocatalyst with wide-ranging applications in environmental remediation and energy conversion. However, undesirable charge recombination and insufficient visible light absorption of pure...

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Cited by 2 publications

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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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Interfacial Engineering of BiVO₄/Bi₂Mo₂O₉ Heterojunction Toward Photogenerated Carriers Anisotropic Transfer

Xiong,

Zhou,

Zhou

et al. 2024

Energy Tech

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Developing an advanced strategy to decrease the charge recombination of BiVO4 is a vital requirement to boost charge transfer for photoelectrochemical water oxidation. Herein, a type II BiVO4/Bi2Mo2O9 heterojunction is successfully synthesized on fluorine‐doped tin oxide substrate by successive ionic layer adsorption and reaction method. Thanks to the Fermi‐level energy difference of 275 mV between BiVO4 and Bi2Mo2O9, an outward built‐in electric filed pointing from Bi2Mo2O9 to BiVO4 is induced, which accelerates the directional flowing of photogenerated electron and hole. Such a unique design structure fastens the electron migration from BiVO4 to Bi2Mo2O9, and the holes will transfer to the surface to participate in water oxidation. The longer lifetime (9.2 ns) by time‐resolved transient photoluminescence signifies that the Bi2Mo2O9 can boost interfacial carriers’ anisotropic migration; the surface charge transfer rate of BiVO4/Bi2Mo2O9 is up to 387.6 s−1 (1.4 V vs reversible hydrogen electrode (RHE)). The BiVO4/Bi2Mo2O9 heterojunction exhibits a remarkable charge separation efficiency of 64% and outstanding photocurrent density of 0.9 mA cm−2 at 1.23 V versus RHE.

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In situ growth of Cs₃Bi₂Br₉ on ultrathin BiVO₄ nanosheets to fabricate heterojunction intimate interfaces for enhancing photocatalytic activity

Abstract: Lead-free halide perovskites have emerged as a potential green photocatalyst with wide-ranging applications in environmental remediation and energy conversion. However, undesirable charge recombination and insufficient visible light absorption of pure...

Cited by 2 publications

References 62 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

Interfacial Engineering of BiVO₄/Bi₂Mo₂O₉ Heterojunction Toward Photogenerated Carriers Anisotropic Transfer

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In situ growth of Cs3Bi2Br9 on ultrathin BiVO4 nanosheets to fabricate heterojunction intimate interfaces for enhancing photocatalytic activity

Abstract: Lead-free halide perovskites have emerged as a potential green photocatalyst with wide-ranging applications in environmental remediation and energy conversion. However, undesirable charge recombination and insufficient visible light absorption of pure...

Cited by 2 publications

References 62 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

Interfacial Engineering of BiVO4/Bi2Mo2O9 Heterojunction Toward Photogenerated Carriers Anisotropic Transfer

Contact Info

Product

Resources

About

In situ growth of Cs₃Bi₂Br₉ on ultrathin BiVO₄ nanosheets to fabricate heterojunction intimate interfaces for enhancing photocatalytic activity

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

Interfacial Engineering of BiVO₄/Bi₂Mo₂O₉ Heterojunction Toward Photogenerated Carriers Anisotropic Transfer