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Photocatalytic degradation of imidacloprid by optimized Bi2WO6/NH2-MIL-88B(Fe) composite under visible light

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Abstract

Imidacloprid as a widely used neonicotinoid insecticide can cause harmful pesticide residue inevitably. Metal-organic frameworks (MOFs) were innovatively composited to improve the light absorption and degradation performance of Bi2WO6 semiconductor, which expanded the photodegradation application in solving environmental problems. Based on the synergistic effect of Bi2WO6 and NH2-MIL-88B(Fe), a Bi2WO6/NH2-MIL-88B(Fe) (BNM) heterojunction photocatalyst with high-performance of photocatalytic degradation activities was successfully synthesized. The optimized BNM catalyst had a good degradation rate under visible light, which was mainly caused by generation of the active ·OH. Transient photocurrent response and electrochemical impedance tests verified that 1:2 BNM exhibits a highest charge separation and a lowest carrier recombination rate which were favorable to the photocatalytic activity. Cycle experiments show that the composite photocatalyst had good reusability and stability which were very important for potential industry applications.

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The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Funding

This research was funded by the National Natural Science Foundation of China (31601550) and Natural Science Foundation of Hunan (2019JJ50638).

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MLC: conceptualization, validation, writing review and editing. THL: conceptualization, data curation, formal analysis, investigation, writing-original draft. SSL: conceptualization, data curation, formal analysis, investigation. LW: conceptualization, data curation, writing-review and editing. ZX: conceptualization, validation, writing-review and editing. YHC: resources, writing-review and editing.

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Correspondence to Mao-Long Chen or Yun-Hui Cheng.

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The authors declare no competing interests.

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Chen, ML., Lu, TH., Li, SS. et al. Photocatalytic degradation of imidacloprid by optimized Bi2WO6/NH2-MIL-88B(Fe) composite under visible light. Environ Sci Pollut Res 29, 19583–19593 (2022). https://doi.org/10.1007/s11356-021-17187-x

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  • DOI: https://doi.org/10.1007/s11356-021-17187-x

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