摘要
Hummers法制备了氧化石墨烯(GO),将GO与聚氨丙基/苯基倍半硅氧烷(PAPSQ)通过酰胺化反应制备GO/PAPSQ复合材料,将其用作吸附剂除去含铬废水中铬离子(Cr^3+).研究中采用FTIR、XRD、SEM等表征手段,对所制备的GO及GO/PAPSQ复合材料的结构进行了表征,研究了GO与PAPSQ的质量比、溶液的pH值、吸附时间、Cr^3+初始浓度等因素对吸附性能的影响.结果表明,GO/PAPSQ复合材料含有片层和笼型结构,其水相分散性较PAPSQ明显提高,而且吸附后便于分离.当GO与PAPSQ的质量比为20∶1、吸附溶液的pH为5时吸附效果好,吸附速度快,吸附容量大,平衡吸附量达到282.35 mg/g.
Graphene oxide(GO)was prepared by Hummers′method and GO react with polyaminopropyl phenylsilsesquioxane(PAPSQ)to prepare GO/PAPSQ composite by amidation reaction of PAPSQ.The structure of GO and GO/PAPSQ composites were characterized by FTIR,XRD and SEM.The effect of the mass ratio of components,pH of solution,adsorption time and initial concentration of Cr^3+on adsorption properties of GO/PAPSQ composite were also investigated.The results show that the GO/PAPSQ composite contains a sheet layer and a cage structure and its dispersibility in the water phase is significantly improved compared with PAPSQ.It is also recovered easily after adsorption.When the mass ratio of GO to PAPSQ is 20∶1 and pH of the adsorption solution is 5,the adsorption effect is best and the adsorption speed is fast and the equilibrium adsorption capacity can reach 282.35 mg/g.
作者
吕生华
刘相
侯永刚
LV Sheng-hua;LIU Xiang;HOU Yong-gang(College of Bioresources Chemical and Materials Engineering,Shaanxi University of Science&Technology,Xi′an 710021,China;School of Materials Science and Chemical Engineering,Xi′an Technological University,Xi′an 710021,China)
出处
《陕西科技大学学报》
CAS
2020年第3期113-120,共8页
Journal of Shaanxi University of Science & Technology
基金
国家自然科学基金项目(21276152)
陕西省科技厅科技统筹资源引导计划项目(2016KTCL01-14)。
关键词
氧化石墨烯
吸附
聚氨丙基/苯基倍半硅氧烷
含铬废水
graphene oxide
adsorption
polyaminopropyl/phenyl sesquioxane
wastewater containing chromium
