Hydrothermal synthesis of stable lead-free Cs4MnBi2Cl12 perovskite single crystals for efficient photocatalytic degradation of organic pollutants

Recently, the photocatalytic degradation of organic pollutants using halide perovskite materials has increasingly attracted people's attention. However, the stability issues and the lead toxicity of such materials cast a shadow over their practical applications. In this study, we successfully s...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2023-03, Vol.11 (11), p.3715-3725
Main Authors: Xiao-Feng, Qi, Zhang, Fei, Zhi-Peng, Chen, Chen, Xu, Mo-Chen, Jia, Hui-Fang, Ji, Zhi-Feng, Shi
Format: Article
Language:English
Subjects:
Decoloring
Ethanol
High performance liquid chromatography
Hydrothermal crystal growth
Lead free
Light irradiation
Mass spectrometry
Methylene blue
Oxidation
Perovskites
Photocatalysis
Photodegradation
Pollutants
Rhodamine
Ring opening
Single crystals
Structural stability
Toxicity
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Summary:Recently, the photocatalytic degradation of organic pollutants using halide perovskite materials has increasingly attracted people's attention. However, the stability issues and the lead toxicity of such materials cast a shadow over their practical applications. In this study, we successfully synthesized non-toxic Cs4MnBi2Cl12 single crystals (SCs) using a hydrothermal method. Joint experiment–theory characterizations reveal the good stability of Cs4MnBi2Cl12. Furthermore, the application of Cs4MnBi2Cl12 as a photocatalyst in the degradation of organic pollutants was demonstrated for the first time. In detail, rhodamine B (RhB), methylene blue and Sudan Red III dissolved in ethanol can be degraded and decolorized by Cs4MnBi2Cl12 SCs under light irradiation. About 97% RhB can be degraded in 7 min, and the degradation efficiency is hardly decreased over ten cycles. Besides, the photocatalytic degradation mechanisms were studied, and the results show that the superoxide (·O2−) plays a leading role in the photocatalytic process. The degradation pathways of organic pollutants were subsequently analyzed by high-performance liquid chromatography–mass spectrometry, involving three stages of N-deethylation, ring opening, and mineralization. Encouraged by the remarkable structural and optical stability of Cs4MnBi2Cl12 SCs, such lead-free perovskite materials may have broad application prospects in the field of photocatalysis.
ISSN:2050-7526
2050-7534
DOI:10.1039/d3tc00185g