Abstract
Aflatoxin B(1) (AFB(1)) is a highly toxic carcinogen severely harmful to humans and animals. This study fabricated SDB-6-K-9@TiO(2) composites via the hydrothermal synthesis method to reduce AFB(1). The structural characterization results of the photocatalytic composites showed that TiO(2) 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(2) in a 100 μg/mL AFB(1) 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(2) were postulated. The results show a new way to improve TiO(2)'s photocatalytic performance, providing a certain theoretical basis for the effective AFB(1) reduction.