Abstract
Deoxynivalenol (DON) is a major mycotoxin with high toxicity that often contaminates grains, foods and feeds. The traditional approaches for DON removal are difficult to meet industry and agriculture demands due to the high stability of the DON molecule. Therefore, there is an urgent need to develop green and effective strategies for DON degradation. In this study, a batch of photocatalytic nanomaterials of cerium (Ce) doped titanium dioxide (TiO2) were successfully prepared by sol-gel method. The catalysts were systematically characterized by XRD, HRTEM, FT-IR, UV-Vis and XPS. The catalyst 0.5Ce-TiO2 showed superior photocatalytic activity for DON degradation in aqueous solution under ultraviolet light irradiation, better than that of traditional photocatalyst pure TiO2, and 96% DON with initial concentration of 5.0 mg/L could be degraded in 4 h. In addition, the two possible degradation intermediate products C5H8O3 and C17H18O6 were identified, the photocatalytic degradation mechanism and degradation pathway were studied. The results indicate that Ce doped TiO2 photocatalyst can be used to reduce DON effectively.
Highlights
IntroductionThe catalyst 0.5Ce-TiO2 showed superior photocatalytic activity for DON degradation in aqueous solution under ultraviolet light irradiation, better than that of traditional photocatalyst pure TiO2 , and 96% DON with initial concentration of 5.0 mg/L could be degraded in
College of Chemistry and Chemical Engineering, Mu Danjiang Normal University, Institute for Agro-food Standards and Testing Technology, Shanghai Academy of Agricultural Sciences, CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Both P.H. and Z.Z. rank as the first authors
Introduction with regard to jurisdictional claims in Deoxynivalenol (DON), a high-toxicity secondary metabolite produced by Fusarium graminearum, is one of the most common mycotoxins in grains [1], foods and feeds [2]
Summary
The catalyst 0.5Ce-TiO2 showed superior photocatalytic activity for DON degradation in aqueous solution under ultraviolet light irradiation, better than that of traditional photocatalyst pure TiO2 , and 96% DON with initial concentration of 5.0 mg/L could be degraded in. Key Contribution: 0.5Ce-TiO2 showed superior photocatalytic activity for DON removal in aqueous solution under ultraviolet light irradiation. 1. Introduction with regard to jurisdictional claims in Deoxynivalenol (DON), a high-toxicity secondary metabolite produced by Fusarium graminearum, is one of the most common mycotoxins in grains [1], foods and feeds [2]. Introduction with regard to jurisdictional claims in Deoxynivalenol (DON), a high-toxicity secondary metabolite produced by Fusarium graminearum, is one of the most common mycotoxins in grains [1], foods and feeds [2] This mycotoxin poses a serious threat to human health and animals [3,4]
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