大尺寸SiO_2大孔材料的表面改性及其吸附性能  

Surface Modified Large-sized SiO_2 Macroporous Materials and their Adsorption Properties

作　　者：张群[1] 梁云霄[1] 张育淇[1] 

机构地区：[1]宁波大学材料科学与化学工程学院,宁波315211

出　　处：《宁波大学学报（理工版）》2012年第3期92-96,共5页Journal of Ningbo University：Natural Science and Engineering Edition

基　　金：国家重点基础研究发展计划973前期专项(2010CB635116);宁波市社会发展项目(2011C50052);宁波大学王宽诚基金

摘　　要：以具有三维骨架结构的环氧树脂大孔聚合物为整体型模板,利用硅酸酯原位溶胶-凝胶过程和高温烧结法制备出大尺寸SiO2大孔材料,通过水热法用铝酸钠对材料进行表面改性,得到铝掺杂SiO2大孔材料(Al-SiO2),并用SEM、FTIR和XPS对大孔材料进行了表征.以Cu2+和Pb2+为模拟污染物,研究改性大孔材料的吸附性能.结果表明:改性大孔材料对Cu2+和Pb2+均具有良好吸附能力;Al-SiO2对Cu2+和Pb2+的最大吸附量分别为71mg.g-1和138mg.g-1,0.100 g Al-SiO2对100mL 50mg.L-1水溶液中Pb2+的去除率达到95.3%,重复使用3次后的去除率保持在89.8%.Large-sized SiO2 macroporous materials are prepared using a three-dimensional （3D） skeletal epoxy resin macroporous polymer as template through an in situ sol-gel process of ethyl silicate and a subsequent calcination at high temperature. The SiO2 macroporous materials are modified with sodium aluminate through hydrothermal method. The Al-doped SiO2 macroporous materials （Al-SiO2） are obtained and characterized by SEM, FTIR and XPS. Cu^2＋ and Pb^2＋ are selected as simulative pollutants, the adsorption properties of the modified SiO2 macroporous materials are investigated. The results show that the modified macroporous materials have satisfactory adsorption capacity for Cu^2＋ and Pb^2＋. Using Al-SiO2 as adsorbents, the maximum adsorption capacities of Cu^2＋ and Pb^2＋ are 71 mg.g^-1 and 138 mg.g^-1, respectively. The removal efficiency of Pb^2＋ is found to be 95.3% at an initial concentration of 50 mg·L^-1, 100 mL aqueous solution and 0.100 g Al-SiO2. After 3 cycles of adsorption, 89.8% removal efficiency of Pb^2＋ is maintained.

关 键 词：大尺寸SiO2大孔材料 表面改性 吸附 

分 类 号：TQ424[化学工程]