Insight into the boosted ZEN degradation over defective Bi2WO6 ultrathin layers: ROS-mediated mechanism and application in corn oil. (30th March 2023)

• Record Type: Journal Article
• Authors: Yang, Xianglong; Cheng, Ling; Zhang, Qi; Yu, Li; Qi, Xin; Mao, Jin; Li, Peiwu
• Is Part Of: Food chemistry. Volume 405:Part B(2023)
• Publication Date: 2023-03-30
• Subjects: Zearalenone -- Photocatalysis -- Reactive oxygen species -- Bi2WO6; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2022.134895
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: Efficient ZEN degradation was realized over the defective Bi2 WO6 ultrathin layer. DFT calculations and measurements implied O2 – and 1 O2 were the main active species. Reasonable mechanism for ZEN degradation were proposed based on nine intermediates. Feasibility of developed method was proven taking corn oil as the practical sample. Abstract: Establishing an effective and sustainable strategy for zearalenone (ZEN) degradation is of great significance to agricultural development and food safety. Herein, more than 98 % of ZEN (2 ppm) was photocatalytic degraded within 90 min over the oxygen-deficient Bi2 WO6 ultrathin layers (BWO-U), along with the sharp elimination of biotoxicity to GES-1 cells. Theoretical calculations and characterizations revealed the ultrathin structure and oxygen vacancies endowed BWO-U with strengthened photoelectrochemical activity and O2 -adsorption capacity, facilitating the generation of O2 – and 1 O2 which play decisive roles in ZEN degradation. Furthermore, a possible mechanism was proposed based on nine intermediates identified via LC-MS, including the steps of cis–trans isomerization, oxidation and cleavage. Eventually, the method also exhibited immense potential in reducing ZEN-contamination in corn oil, and made no significant impact on the quality of corn oil. This work might provide a feasible strategy to mitigate ZEN-contamination and cast a new light on the ROS-mediated mechanism.