氯化钠和盐酸用量对合成氨基介孔二氧化硅及其CO_2吸附性能的影响  

Effects of sodium chloride and hydrochloric acid dose on the synthesis of amino-functionalized mesoporous silicas and their CO_2 adsorption properties

作　　者：常虹[1] 肖强[1] 钟依均[1] 朱伟东[1] 

机构地区：[1]浙江师范大学物理化学研究所先进催化材料省部共建教育部重点实验室,浙江金华321004

出　　处：《浙江师范大学学报（自然科学版）》2011年第4期436-440,共5页Journal of Zhejiang Normal University:Natural Sciences

基　　金：浙江省创新科研项目(YK2008037);浙江省自然科学基金杰出青年团队项目(R4080084)

摘　　要：使用阴离子表面活性剂为模板剂,以γ-氨丙基三甲氧基硅烷(APMS)和正硅酸乙酯(TEOS)分别为共结构导向剂和硅源,直接合成了氨基介孔二氧化硅(AFMS).通过X射线衍射(XRD)、N2吸脱附和热重(TG)方法研究了合成体系中氯化钠(NaCl)和盐酸用量对AFMS结构和CO2吸附性能的影响.结果表明:合成体系中添加NaCl,并在此基础上优化盐酸用量,会提高合成介孔材料的有序度,增加AFMS的CO2吸附量.最佳条件下合成的材料在30℃,CO2分压为50 kPa时对CO2的吸附量可达0.89 mmol/g.Amino-functionalized mesoporous silicas（AFMS） were directly synthesized by using anionic surfactant as the template,tetraethoxysilane（TEOS） as the silica source,and 3-aminopropyltrimethoxysilane（APMS） as the co-structure directing agent.The effects of sodium chloride and hydrochloric acid dose in the synthesis system on the structure and CO2 adsorption properties of the synthesized AFMS were characterized by XRD,N2 adsorption,and TG techniques.The results indicated that the addition of NaCl not only improved the mesostructure ordering of the synthesized AFMS but also enhanced their CO2 adsorption capacities.The amino-functionalized mesoporous silica synthesized under the optimized condition could adsorb as high as 0.89 mmol/g at 30 ℃ and a CO2 partial pressure of 50 kPa.

关 键 词：氨基介孔二氧化硅 氯化钠 盐酸 CO2吸附 阴离子表面活性剂 

分 类 号：O64[理学—物理化学]