摘要
在高含量硅羟基的SBA-15介孔孔道中用3-氨丙基三乙氧基硅烷(APTES)表面改性后,在介孔孔道内合成了1代和2代的PAMAM(Poly(amide amine))枝状化合物.利用该复合体系进行了重金属离子吸附实验,并与只用APTES(3-氨丙基三乙氧基硅烷)改性的SBA-15进行对比,得到了各代样品对Pb^(2+)和Cu^(2+)的饱和吸附容量,并且用TG-MS分析方法证实了PAMAM改性后的SBA-15对金属离子的络合强度要比仅用APTES改性的要强.在模拟废水溶液吸附实验中,该复合体系对Pb^(2+)、Zn^(2+)离子具有选择吸附,处理后溶液中Pb^(2+)、Zn^(2+)离子浓度为0.003mg/L和0.037mg/L,均低于国家饮用水标准.
Using 3-aminopropyltriethoxysilan（APTES）to modify the interior surface of SBA-15 channels,PAMAM of generation 1 and generation 2 were successfully grafted in the meso-channels of SBA-15.The PAMAM-SBA-15 hybrids are employed in the adsorption of heavy metal ions to determine their adsorptive capacity,with the APTES modified SBA-15 as a reference sample.The bonding between PAMAM hybrids and metal ions are proved to be much stronger than that of APTES modified SBA-15 by TG-MS tests.Hybrids are used in deposition solution containing several kinds of heavy metal ions, and the selective adsorption of Pb（2＋）and Zn（2＋）is found.After deposition,the concentrations of Pb（2＋） and Zn（2＋）are reduced to 0.003mg/L and 0.037mg/L,respectively,which are lower than the national standard of drinking water.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第6期1231-1235,共5页
Journal of Inorganic Materials
基金
国家自然科学基金(50702072)
