摘要
Bilayer-silane-coated Fe304 nanoparticles with inner layer of tetraethoxy silane （TEOS） and outer layer of vinyltriethoxysilane （VTEO） were generated to enhance their acid resistance. These nanoparticles were copolymerized with vinylbenzyl chloride （VBC） using suspension polymerization, and then post-crosslinked. The resulting hypercrosslinked magnetic resin M150 presented specific bimodal property with large specific surface area of 1109 m2/g. It exhibited more excellent adsorption capacity of p- nitrophenol compared to another two magnetic adsorbents Q150 and MIEX~. Moreover, the acid stable property of the magnetite in MI50 extended its application at low pH value.
Bilayer-silane-coated Fe304 nanoparticles with inner layer of tetraethoxy silane （TEOS） and outer layer of vinyltriethoxysilane （VTEO） were generated to enhance their acid resistance. These nanoparticles were copolymerized with vinylbenzyl chloride （VBC） using suspension polymerization, and then post-crosslinked. The resulting hypercrosslinked magnetic resin M150 presented specific bimodal property with large specific surface area of 1109 m2/g. It exhibited more excellent adsorption capacity of p- nitrophenol compared to another two magnetic adsorbents Q150 and MIEX~. Moreover, the acid stable property of the magnetite in MI50 extended its application at low pH value.
基金
support provided by Program for Changjiang Scholars and Innovative Research Team in University,NSFC(Nos.50825802 and 51178215)
Jiangsu Nature Science Fund(Nos. BK2010006 and BK2011032)P.R.China
