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Photocatalysis and degradation products identification of deoxynivalenol in wheat using upconversion nanoparticles@TiO2 composite
- Wu, Shijia, Wang, Fang, Li, Qian, Wang, Jing, Zhou, You, Duan, Nuo, Niazi, Sobia, Wang, Zhouping
- Food chemistry 2020 v.323 pp. 126823
- deoxynivalenol, environmental protection, food safety, food security, lighting, nanoparticles, pH, photocatalysis, photocatalysts, titanium dioxide, wheat
- Deoxynivalenol (DON) is one of the most common contaminants of cereal grains. Efficient and environmental-friendly technology to eliminate DON is important for food safety and environmental protection. In this work, upconversion nanoparticles (UCNP) coated with titanium dioxide (TiO₂) photocatalysts were synthesized. Then, a photocatalytic experiment was performed to test the impact of NaYF₄:Yb,Tm@TiO₂ of DON degradation. Our results showed the DON degradation rate at 10 μg/mL under simulated sunlight using NaYF₄:Yb,Tm@TiO₂ (6 mg/mL) approached 100% within 60 min at pH 8.0. UPLC-Q-TOF MS was used to monitor the degradation process and three degradation products were identified, namely C₁₅H₂₀O₈, C₁₅H₂₀O₇ and C₁₅H₂₀O₅. Subsequently, we studied the photocatalytic degradation of DON in wheat, providing a theoretical basis for photocatalytic degradation of contaminated grain samples. This study demonstrated that UCNP@TiO₂ photocatalysis has the potential for detoxification in food security applications.