Photocatalytic degradation of deoxynivalenol using graphene/ZnO hybrids in aqueous suspension
Photocatalytic degradation of deoxynivalenol using graphene/ZnO hybrids in aqueous suspension
复制标题
水悬浮液中石墨烯/ZnO 杂化物光催化降解脱氧雪腐镰刀菌烯醇
DOI：
10.1016/j.apcatb.2016.11.010
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发表时间：
2017-05-05
影响因子：
22.1
通讯作者：
Zhu, Yongfa
中科院分区：
文献类型：
--
作者：
Bai, Xiaojuan;Sun, Changpo;Zhu, Yongfa
水溶性脱氧雪腐镰刀菌烯醇(DON)作为一种潜在的有机污染物对水环境质量构成了重大威胁。DON是一种由镰刀菌属霉菌产生的有毒次生代谢产物，是谷物中最重要的真菌毒素之一，在湿法加工过程中可通过脱氧雪腐镰刀菌烯醇从受污染的粮食中富集。本工作采用简单的一步水热法制备了石墨烯/氧化锌杂化材料，并在紫外光照射下对DON进行了光催化降解。石墨烯/氧化锌杂化催化剂GZ0.3的紫外光催化活性是纯氧化锌的3.1倍，约99%的DON(15ppm)可在30min内被光降解，并出现三个中间产物峰。ESI/MS分析证实了正ESI模式下二次质谱图中DON和降解产物的存在。总之，本工作可以为制备高性能石墨烯/氧化锌杂化光催化剂提供新的思路，并促进其在霉菌毒素解毒和环境保护问题上的应用。(C)2016爱思唯尔B.V.保留所有权利。
Water-soluble deoxynivalenol (DON) pose a major threat as a potential organic pollutant to water environmental quality. DON is a toxic secondary metabolite produced by molds of the Fusarium genus and one of the most important mycotoxins in cereal commodities, which can be enriched from the contaminated grain by deoxynivalenol in the process of wet processing. In this work, graphene/ZnO hybrids has been successfully prepared via a simple one-step hydrothermal method and exhibited superior photocatalytic activity for the photodegradation of DON under the irradiation of UV light. The UV light photocatalytic activity of graphene/ZnO hybrid GZ0.3 was 3.1 times than pure ZnO and about 99% of DON (15 ppm) could be photodegraded within 30 min totally while there were three peaks of interniediate products appeared. The ESI/MS analysis confirmed the presence of DON and degradation product with the secondary mass spectrogram in the positive ESI mode. Overall, this work Could provide new insights into the fabrication of graphene/ZnO hybrids composite as high performance photocatalysts and facilitate their application in the mycotoxin detoxification and environmental protection issues. (C) 2016 Elsevier B.V. All rights reserved.