title: Photocatalytic degradation of Acephate, Omethoate, and Methyl parathion by Fe3O4@SiO2@mTiO2 nanomicrospheres.
abstract: A novel magnetic mesoporous nanomicrospheres Fe3O4@SiO2@mTiO2 were synthetized and characterized by a series of techniques including FE-TEM, EDS, FE-SEM, PXRD, XPS, BET, TGA as well as VSM, and subsequently tested as a photocatalyst for the degradation of Acephate, Omethoate, and Methyl parathion under UV irradiation. The well-designed nanomicrospheres exhibit a pure and highly crystalline anatase TiO2 layer, large specific surface area, and high-magnetic-response. Photocatalytic degradation of the three organophosphorus pesticides (OPPs) and the formation intermediates were identified using HPLC, TOC-Vcpn, IC, pH meter and GC-MS. Acephate, Omethoate, and Methyl parathion disappeared after 45min, 45min, and 80min UV illumination, respectively. At the end of the treatment, the total organic carbon (TOC) of the OPPs was reduced 80-85%. The main mineralization products were SO4(2-), NO3(-) and PO4(3-) and Omethoate additionally formed NO2(-). Based on the results, we proposed the photocatalytic degradation pathways for Acephate, Omethoate, and Methyl parathion.
authors.affiliation: State Key Laboratory of Food Science and Technology, School of Food Science of Jiangnan University, School of Food Science Synergetic Innovation Center of Food Safety and Quality Control, Wuxi, Jiangsu 214122, China. Electronic address: zllyslngj@126.com.
authors.forename: Lingling
authors.initials: L
authors.lastname: Zheng
authors.affiliation: State Key Laboratory of Food Science and Technology, School of Food Science of Jiangnan University, School of Food Science Synergetic Innovation Center of Food Safety and Quality Control, Wuxi, Jiangsu 214122, China.
authors.forename: Fuwei
authors.initials: F
authors.lastname: Pi
authors.affiliation: State Key Laboratory of Food Science and Technology, School of Food Science of Jiangnan University, School of Food Science Synergetic Innovation Center of Food Safety and Quality Control, Wuxi, Jiangsu 214122, China.
authors.forename: Yifan
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Key Laboratory of Healthy & Intelligent Kitchen System Integration, Ningbo, Zhejiang 315336, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Food Science and Technology, School of Food Science of Jiangnan University, School of Food Science Synergetic Innovation Center of Food Safety and Quality Control, Wuxi, Jiangsu 214122, China.
authors.forename: Yinzhi
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Food Science and Technology, School of Food Science of Jiangnan University, School of Food Science Synergetic Innovation Center of Food Safety and Quality Control, Wuxi, Jiangsu 214122, China. Electronic address: sxlzzz@jiangnan.edu.cn.
authors.forename: Xiulan
authors.initials: X
authors.lastname: Sun
keywords: Degradation mechanism; Fe(3)O(4)@SiO(2)@mTiO(2); Intermediates; Organophosphorus compounds; Photocatalysis