Department of Nutrition and Health, China Agricultural University, Beijing 100193, China.
School of Food and Health, Beijing Technology and Business University, Beijing 100048, China.
Toxins (Basel). 2024 Oct 5;16(10):429. doi: 10.3390/toxins16100429.
Aflatoxin B (AFB) is a highly toxic carcinogen severely harmful to humans and animals. This study fabricated SDB-6-K-9@TiO composites via the hydrothermal synthesis method to reduce AFB. The structural characterization results of the photocatalytic composites showed that TiO was successfully loaded onto SDB-6-K-9. The different photocatalytic degradation conditions, photocatalyst kinetics, recycling performance, and photocatalytic degradation mechanism were investigated. Photocatalysis with 6 mg of 4%SDB-6-K-9@TiO in a 100 μg/mL AFB solution presented a reduction of over 95%, exhibiting excellent performance, high stability, and reusability even after five cycles of photocatalytic experiments. Active species trapping experiments confirmed that holes (h) played the most critical role. After structural analysis and identification of the photocatalytic degradation products, the photodegradation path and photocatalytic oxidation mechanism of 4%SDB-6-K-9@TiO were postulated. The results show a new way to improve TiO's photocatalytic performance, providing a certain theoretical basis for the effective AFB reduction.
黄曲霉毒素 B（AFB）是一种毒性很强的致癌物质，对人类和动物有严重危害。本研究通过水热合成法制备了 SDB-6-K-9@TiO 复合材料，以减少 AFB。光催化复合材料的结构表征结果表明，TiO 成功负载到 SDB-6-K-9 上。考察了不同的光催化降解条件、光催化剂动力学、回收性能和光催化降解机制。在 100 μg/mL AFB 溶液中，6 mg 的 4%SDB-6-K-9@TiO 的光催化作用使 AFB 的去除率超过 95%，表现出优异的性能、高稳定性和可重复使用性，即使经过五次光催化实验循环也是如此。活性物种捕获实验证实空穴（h）起着最重要的作用。通过对光催化降解产物的结构分析和鉴定，提出了 4%SDB-6-K-9@TiO 的光降解途径和光催化氧化机制。结果表明，这为提高 TiO 的光催化性能提供了一种新途径，为有效减少 AFB 提供了一定的理论依据。
