农药学学报2016,Vol.18Issue(5):644-650,7.DOI:10.16801/j.issn.1008-7303.2016.0090
共缩聚法制备氨基化介孔硅及其对毒死蜱的缓释性能
Slow-release performance of chlorpyrifos of an amino functionalized mesoporous silica prepared by the co-condensation method
摘要
Abstract
A modified mesoporous silica (MCM-41) is prepared by chemical modification. Amino functionalized mesoporous silica (NH2-MCM-41) was prepared by co-condensation method, employing hexadecyltrimethylammonium bromide (CTAB) as template, tetraethoxysilane (TEOS) as the silicon source, and 3-aminopropyl triethoxysilane (APTES) as modifying agent. Chlorpyrifos was choosed as the model pesticide, and the chlorpyrifos/amino functionalized mesoporous silica system were prepared using the impregnation method. The structures, morphologies, Zeta potential and loading of chlorpyrifos of MCM-41 and NH2-MCM-41 were systematically studied using X-ray diffraction assay (XRD), N2 adsorption-desorption, transmission electron microscopy (TEM), scanning electron microscopy (SEM), Zeta potential and fourier transform infrared spectroscopy (FTIR). The adsorption capacity (AC) and slow-release performmance of chlorpyrifos were also discussed. Besides, the interaction between NH2-MCM-41 and chlorpyrifos is investigated. The results showed that MCM-41 and NH2-MCM-41 have ordered mesoporous structure of the hexagonal phase. The AC of MCM-41 is 106 mg/g, while the maximum AC of NH2-MCM-41 is 178 mg/g. And the AC increases with the increase of the Zeta potential of NH2-MCM-41. The APTES was beneficial to improve the slow-release performance of MCM-41 of chlorpyrifos. The corresponding releasing curves could be described by Higuchi equation.关键词
共缩聚法/介孔硅/MCM-41/氨基化改性/毒死蜱/缓释性能Key words
co-condensation method/mesoporous silica/MCM-41/amino modification/chlorpyrifos/slow-release performance分类
化学化工引用本文复制引用
林粤顺,周新华,周红军,龚圣,徐华,陈铧耀..共缩聚法制备氨基化介孔硅及其对毒死蜱的缓释性能[J].农药学学报,2016,18(5):644-650,7.基金项目
国家自然科学基金(21576303);广东省自然科学基金(2016A030313375);广东省科技计划项目(2014A020208126);广州市科技计划项目(201510010150);广东省教育厅特色创新项目(2015KTSCX064) (21576303)