Reduction of aflatoxin B1 by magnetic graphene oxide/TiO2 nanocomposite and its effect on quality of corn oil

Magnetic graphene oxide/TiO2(MGO/TiO2) nanocomposite was synthesized for the reduction of aflatoxin B-1 (AFB(1)) in corn oil. The photodegradation of synthesized nanocomposites on AFB(1) in corn oil under different treatment conditions and its effect on the quality of corn oil were investigated. The doping of magnetic GO effectively enhanced the photocatalytic activity of TiO2 both under UV light and visible light. The reduction of AFB1 in corn oil reached 96.4% after illumination for 120 min under UV-Vis light. Holes (h(+)) and the hydroxyl radicals ((OH)-O-center dot) were found to play important roles in the reduction of AFB(1), and three transformation products were confirmed by electrospray ionization mass spectrometry (ESI/MS) analysis. In addition, the quality of the treated corn oil was still acceptable after storage for 180 days. This study provides an effective, environmental friendly and practical approach for reduction of AFB(1) in oil products.

Automated summary

The study synthesized a magnetic graphene oxide/TiO2 nanocomposite for reducing aflatoxin B-1 in corn oil, with a high reduction rate of 96.4% under UV-Vis light after 120 min illumination. The photocatalytic activity of the nanocomposite was enhanced under both UV and visible light, with holes and hydroxyl radicals playing key roles in AFB(1) reduction. The quality of the treated corn oil remained acceptable after 180 days, demonstrating an effective and environmentally friendly approach for reducing AFB(1) in oil products.