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Toxins 2019, 11(2), 105; https://doi.org/10.3390/toxins11020105

Photocatalytic Degradation of Deoxynivalenol over Dendritic-Like α-Fe2O3 under Visible Light Irradiation

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1,3,4
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and
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1
Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
2
Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China
3
Key Laboratory of Detection for Biotoxins, Ministry of Agriculture, Wuhan 430062, China
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Laboratory of Risk Assessment for Oilseeds Products (Wuhan), Ministry of Agriculture, Wuhan 430062, China
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Quality Inspection and Test Center for Oilseeds Products, Ministry of Agriculture, Wuhan 430062, China
*
Author to whom correspondence should be addressed.
Received: 10 January 2019 / Revised: 6 February 2019 / Accepted: 8 February 2019 / Published: 11 February 2019
(This article belongs to the Special Issue Novel Approaches to Minimising Mycotoxin Contamination)
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Abstract

Deoxynivalenol (DON) is a secondary metabolite produced by Fusarium, which is a trichothecene mycotoxin. As the main mycotoxin with high toxicity, wheat, barley, corn and their products are susceptible to contamination of DON. Due to the stability of this mycotoxin, traditional methods for DON reduction often require a strong oxidant, high temperature and high pressure with more energy consumption. Therefore, exploring green, efficient and environmentally friendly ways to degrade or reduce DON is a meaningful and challenging issue. Herein, a dendritic-like α-Fe2O3 was successfully prepared using a facile hydrothermal synthesis method at 160 °C, which was systematically characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). It was found that dendritic-like α-Fe2O3 showed superior activity for the photocatalytic degradation of DON in aqueous solution under visible light irradiation (λ > 420 nm) and 90.3% DON (initial concentration of 4.0 μg/mL) could be reduced in 2 h. Most of all, the main possible intermediate products were proposed through high performance liquid chromatography-mass spectrometry (HPLC-MS) after the photocatalytic treatment. This work not only provides a green and promising way to mitigate mycotoxin contamination but also may present useful information for future studies. View Full-Text
Keywords: deoxynivalenol; degradation; photocatalysis; α-Fe2O3; degradation products deoxynivalenol; degradation; photocatalysis; α-Fe2O3; degradation products
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Wang, H.; Mao, J.; Zhang, Z.; Zhang, Q.; Zhang, L.; Zhang, W.; Li, P. Photocatalytic Degradation of Deoxynivalenol over Dendritic-Like α-Fe2O3 under Visible Light Irradiation. Toxins 2019, 11, 105.

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