Photocatalytic Degradation of Deoxynivalenol Using Cerium Doped Titanium Dioxide under Ultraviolet Light Irradiation

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.

Photocatalytic degradation of glyphosate using Ce/N co-doped TiO2 with oyster shell powder as carrier under the simulated fluorescent lamp

“…N-H bond. The weak peak at 2,350 cm −1 in the spectrum of the pure sample is a characteristic CO 2 absorption peak due to the incomplete evaporation of the ethanol solvent during preparation (He et al, 2021). Raman spectroscopy was used to further study the changes of molecular vibration after modification.…”

“…X-ray photoelectron spectroscopy was used to determine the surface chemical composition and binding state of the sample. The full spectrum of the CeNT@Oys catalyst is shown in Figure 5A, indicating that the sample contains the elements Ti, O, C, Ca, N and Ce, with Ti and O being the dominant elements in the sample, while C may be residual carbon due to incomplete evaporation of the preparation reagent anhydrous ethanol and carbon-based contamination of the XPS detection equipment (Matějová et al, 2014;He et al, 2021).…”

Synthesis and Applications of TiO2‐based Nanostructures as Photocatalytic Materials

“…successfully prepared Au@CNT@TiO 2 nanocomposites as photocatalysts, which can be used to degrade toxic organic dyes, reduce p‐nitrophenol to p‐aminophenol, reduce coumarin molecules to 7‐hydroxycoumarin, and remove toxic ions Cr(VI). He et al [63] . synthesized Ce‐doped TiO 2 photocatalytic materials by sol‐gel method and the catalyst 0.5 Ce‐TiO 2 exhibited excellent photocatalytic activity for the degradation of deoxynivalenol (DON) in aqueous solution under UV light irradiation.…”

“…[59][60][61] Misra et al [62] successfully prepared Au@CNT@TiO 2 nanocomposites as photocatalysts, which can be used to degrade toxic organic dyes, reduce p-nitrophenol to p-aminophenol, reduce coumarin molecules to 7-hydroxycoumarin, and remove toxic ions Cr(VI). He et al [63] synthesized Ce-doped TiO 2 photocatalytic materials by sol-gel method and the catalyst 0. Photocatalytic degradation of wastewater has outstanding technical advantages, but there are still some problems, for example, the photocatalytic reaction is based on the absorption of light energy, so need that the treated system have good light transmission.…”

Degradation of deoxynivalenol in wheat by double dielectric barrier discharge cold plasma: identification and pathway of degradation products

“…Biological transformation 22 is a newly developed method for safety degradation of DON, which destroys toxic functional groups of DON molecules through microorganisms and enzymes generated by metabolism. However, the high cost and long cycle make this method unsuitable for large‐scale production and application 23 . Developing a safe, efficient, and economical strategy for DON degradation is necessary.…”