食用植物油中黄曲霉毒素可见光催化降解材料的设计、合成及性能研究

Aflatoxin content in edible vegetable oil over the standard brings seriously damage to the food security of human. Traditional chemical and physics technologies of aflatoxin detoxification show the low efficiency and selectivity, and even affecting the quality of product. It is significant and useful to develop a new and efficient technology of aflatoxin detoxification. This project presents an innovative technology to degrade aflatoxin, including design and synthesis of visible light response photocatalytic materials with high selectivity and efficiency, estimating the performance of these materials on photodegradation of aflatoxin in edible vegetable oil and the effects of photodegradation on the quality of edible vegetable oil; exploring the relationship between the microstructure of materials and photocatalytic activities, and then illuminating the mechanism of the photodegradation on the base of photocatalytic theory. This project provides technological support for ensuring the safety of edible vegetable oil, and the new ways for the degradation of biotoxin in food.

食用植物油中黄曲霉毒素含量超标，严重危及人类饮食安全。传统化学物理黄曲霉毒素脱毒解毒技术存在效率低、选择性差、影响产品品质等不足，发展新型高效的黄曲霉毒素脱毒解毒技术具有重要的科学意义和实用价值。本项目拟以光催化降解技术为核心，设计和合成可见光响应、高选择性和高活性的光催化材料，评价光催化材料降解食用植物油中黄曲霉毒素的性能及对食用植物油品质的影响，建立黄曲霉毒素绿色、无二次污染和高效脱毒解毒新技术；探索其微结构与可见光催化降解黄曲霉毒素性能之间的关联性，并结合理论揭示光催化反应机理。本项目的开展将为保证食用植物油安全提供必要的技术支撑，也为降解食品中生物毒素提供新的思路和理论指导。

黄曲霉毒素是真菌在自然条件下产生的次生代谢产物，具有强致癌性和致畸性。其结构非常稳定，在温和的条件下传统化学、物理方法难以减轻其污染。本项目首次提出了利用可见光或自然光光催化降解黄曲霉毒素方法，主要内容包括：设计和研制了高效、稳定的可见光响应半导体光催化剂和复合光催化剂；评价了其可见光降解黄曲霉毒素B1的效果，并结合降解效果优化了材料的设计和制备；鉴定了光催化降解黄曲霉毒素B1的产物，推导了光催化反应的机制，并对其安全性和食用油品质进行了系统评价。基于以上取得了初步基础科研数据，以项目号为第一标注发表了高水平论文4篇（IF>6.0, 1篇），申请专利1项，希望能为绿色、高效和稳定的光催化降解黄曲霉毒素的应用提供关键核心材料和科学依据。