数字农科院2.0

Targeted recognition and preferential degradation of aflatoxin B1 in peanut oil by imprinted photocatalyst

文献类型： 外文期刊

作者： Xianglong Yang;Ling Cheng;Xiaoping Yang;Li Yu;Jie Kang;Liangxiao Zhang;Qi Zhang;Jin Mao;Peiwu Li

作者机构：

关键词： Aflatoxins;Bi2WO6;Molecularly imprinted polymers;Targeted photodegradation

期刊名称： Journal of Hazardous Materials

ISSN： 1873-3336

年卷期： 2025 年 499 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Controlling aflatoxins contamination is significant for the safety of edible oil, yet confronts the inherent contradiction between detoxification efficiency and quality preservation. Herein, the targeted recognition and preferential degradation of aflatoxin B1 (AFB1) in peanut oil were realized by the molecularly imprinted polymers decorated defective Bi2WO6 (MIP-BWO). Integrating the merits of sufficient recognition cavities and enhanced photoelectrochemical property, MIP-BWO could selectively adsorb 28.6 % of AFB1 within 60 min, and acquire an ultimate removal rate of 99.5 % after irradiation for 80 min. As a consequence, the degradation products of AFB1 exhibited a sharply reduced toxicity to IEC-6 and HepG2 cells, along with the maintained quality of peanut oil, including acid value, peroxide value, fatty acids, Vitamin E, and resveratrol. Systematic tests and DFT calculations revealed that the adsorption process of AFB1 conformed to a chemisorption-dominated Langmuir model (R2 = 0.999), whereas its degradation was mediated by •O2- and 1O2. Moreover, based on 11 intermediates identified by LC-MS, a plausible degradation pathway was proposed, which began with the attack of electronegative sites, followed by the steps of oxidative dissociation and electrophilic addition. This study paves a feasible strategy to selectively eliminate AFB1, address the contradiction between detoxification and quality preservation.

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