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Photocatalytic degradation of aflatoxin B1 by porous carbon nitrides under visible light

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Abstract

Porous graphitic carbon nitride (g-C3N4), which exhibits a sensitive response to visible light, was prepared through a simple thermal condensation process. It was then used to investigated its efficiency in degrading aflatoxin B1 (AFB1). The factors affecting the degradation efficiency of AFB1, including precursors of g-C3N4, visible light sources, pH value, and irradiation time were investigated. The porous g-C3N4 prepared using melamine as the precursor, exhibits improved crystallization performance and higher photocatalytic activity. The degradation rate of AFB1 reached 98% under the visible light of a metal halide lamp for 90 min, and the degradation process was fitted with the pseudo-first-order kinetic model. In addition, superoxide radicals (·O2−) and holes (h+) play important roles in reducing AFB1. The five degradation products primarily result from damage to the lactone and furan ring structure, which initially demonstrate a decrease in AFB1 toxicity. This study provides an effective, environmentally-friendly, and practical approach for reducing AFB1.

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Data Availability

The datasets are not publicly available due to the participants of this study did not agree for their data to be shared publicly， but are available from the corresponding author on reasonable request.

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Acknowledgements

This study was funded by Cultivation Programme for Young Backbone Teachers in Henan University of Technology (No. 21420144), a Joint Fund Project of Provincial Science and Technology R&D Plan (No. 222103810079), National Natural Science Foundation of China (No. 32001808), and Key R&D Projects in Henan Province (No. 231111113300).

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Authors and Affiliations

  1. Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, College of Food Science and Technology, Henan University of Technology, Lianhua Street, Zhengzhou, 450001, China

    Shumin Sun, Jiajun Li, Yajie Liu & Yanli Xie

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  1. Shumin Sun
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Contributions

SS: Conceptualization, Methodology, Writing—original draft. JL: Data curation, Investigation. YL: Methodology, Data curation. YX: Supervision, Writing—review and editing.

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Correspondence to Yanli Xie.

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Sun, S., Li, J., Liu, Y. et al. Photocatalytic degradation of aflatoxin B1 by porous carbon nitrides under visible light. Reac Kinet Mech Cat 137, 1125–1139 (2024). https://doi.org/10.1007/s11144-023-02556-z

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