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Separation and Purification Technology

Separation and Purification Technology

IF: 8.09
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In situ prepared ionic liquids containing moisture-resistant bismuth-based perovskite crystals enhance the photocatalytic water purification and H2 production of MOF

Published:9 December 2024 DOI: 10.1016/j.seppur.2024.130998
Yao-Yao Wang, Yu-Qing Wang, Li-Xia Bao, Chunfeng Wang, Zhaoyang Wang, Hongjie Zhu, Hui-Juan Wang

Abstract

Perovskite materials have been found to enhance the photocatalytic performances of metal–organic frameworks (MOFs) through the formation of heterojunctions. In this study, two novel perovskite crystals: N-methylbenzothiazoleBiI4 (BtzBiI4) and 1,3-dimethylbenzimidazoleBiI4 (MpiBiI4) were obtained by in situ alkylation of 1-methylbenzimidazole and benzothiazole to prepare 1,3-dimethylbenzimidazole iodide and N-methylbenzothiazolium iodide ionic liquids. BtzBiI4 and MpiBiI4 crystals exhibit remarkable stability in aqueous solutions and broad UV–visible light absorption properties within 680?nm and 640?nm, respectively. Subsequently, a post-modification strategy was employed to integrate these perovskites with the zirconium-based MOF NH2-UiO-66 (U6N) and small-sized Pt clusters, resulting in the fabrication of perovskite quantum dots/Pt@U6N composite heterojunction photocatalysts for hydrogen production and water purification. Consequently, under visible light irradiation, the reduction efficiency of Cr (VI), degradation efficiencies rhodamine B (Rh B) and tetracycline (TC) of BtzBiI4 QDs modified Pt@U6N (BPU) can reach 93.4?%, 98.9?% and 99.4?%, respectively. The H2 production rate in water could be further boosted to 1044.25μmol g-1h?1 by using BPU. Using MpiBiI4 QDs modified Pt@U6N (MPU), the photocatalytic hydrogen production efficiency can reach 955.37μmol g-1h?1. This work comprehensively explores the role of ionic liquid-assisted preparation of moisture-resistant perovskites and their charge transfer dynamics in heterojunctions with MOFs, and introduces efficient photocatalysts for waste water purification.

Substances (5)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Acetic acid 64-19-7 C2H4O2 1633 suppliers $10.00-$8459.00
N,N-Dimethylformamide 68-12-2 C3H7NO 1217 suppliers $11.20-$12200.00
Acetonitrile 75-05-8 C2H3N 1027 suppliers $61180.00
Benzothiazole 95-16-9 C7H5NS 472 suppliers $14.14-$3860.00
Zirconium tetrachloride 10026-11-6 Cl4Zr 255 suppliers $24.80-$4461.10

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