氨基改性SBA-15介孔分子筛的制备及其铬离子吸附性能  

Preparation of SBA-15 mesoporous molecular sieves modified with amino groups and its adsorption performance against chromium( Ⅵ)

作　　者：吴红梅[1] 肖昱 郭宇[1] 李景阳[1] 苗世举 赵亮[2] WU Hong-mei;XIAO Yu;GUO Yu;LI Jing-yang;MIAO Shi-ju;ZHAO Liang(l.School of Chemical and Environmental Engineering, Liaoning University of Technology, Jinzhou 121001;Sinopec Fushun Research Institute of Petroleum and Petrochemicals, Fushun 113001, China)

机构地区：[1]辽宁工业大学化学与环境工程学院,辽宁锦州121001 [2]中国石化抚顺石油化工研究院,辽宁抚顺113001

出　　处：《现代化工》2018年第6期78-82,共5页Modern Chemical Industry

基　　金：国家自然科学基金(21601075);辽宁省自然科学基金(2015020249;20170540435)

摘　　要：以3-氨丙基三甲氧基硅烷(APTMS)为氨基改性试剂,采用后嫁接法制备氨基功能化的SBA-15介孔分子筛。利用扫描电子显微镜、透射电子显微镜、X-射线衍射仪、氮气吸附-脱附等温线和傅里叶红外光谱等表征手段对氨基改性SBA-15介孔分子筛的形貌、结构进行了分析。考察了吸附时间、吸附温度和溶液pH等因素对铬离子(Ⅵ)吸附率的影响。结果表明:与纯SBA-15介孔分子筛相比,氨基改性后的SBA-15分子筛对铬离子(Ⅵ)具有更好的吸附性能。Amino-functionalized SBA-15 mesoporous molecular sieves are prepared by post-grafting method using 3-aminopropyltrimethoxysilane（ APTMS） as amino-modified reagent.Morphology and structure of the amino-modified SBA-15 mesoporous molecular sieves are analyzed by scanning electron microscopy（ SEM）,transmission electron microscopy（ TEM）,X-ray diffraction（ XRD）,nitrogen adsorption-desorption isotherm and Fourier transform infrared spectroscopy（ FT-IR）.The impacts of adsorption time and temperature,and pH value of solution on the adsorption of Cr（ Ⅵ） ions by the prepared molecular sieves are investigated.The results indicate that the amino-modified SBA-15 mesoporous molecular sieves exhibit higher adsorption performance for Cr（ Ⅵ） ions than pure SBA-15 mesoporous molecular sieves.

关 键 词：SBA-15分子筛 介孔 氨基改性 铬离子(Ⅵ) 

分 类 号：O655.4[理学—分析化学]