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以3-氯丙基三甲氧基硅烷(CPTS)和二乙烯三胺(DETA)为原料,合成二乙烯三胺桥联单体;通过二乙烯三胺桥联单体的自凝胶及其在以十六烷基三甲基溴化铵(CTAB)为致孔剂条件下的溶胶-凝胶反应中,分别合成了两种DETA桥联聚倍半硅氧烷吸附材料。比表面及孔径分析结果表明,CTAB的加入使材料的比表面积略有增加,而累积孔体积和平均孔径则显著增大。吸附实验结果表明,两种DETA桥联聚倍半硅氧烷材料对Au(Ⅲ)表现出优异的吸附能力,静态饱和吸附量高达5~6mmol/g,吸附动力学符合拟二级模型;等温吸附符合Langmuir吸附模型。
Diethylenetriamine bridged monomer was synthesized from 3-chloropropyltrimethoxysilane (CPTS) and diethylenetriamine (DETA). The self-gelation of diethylenetriamine-bridged monomer Two kinds of DETA bridging polysilsesquioxane adsorbents were synthesized in the sol-gel reaction using cetyltrimethylammonium bromide (CTAB) as porogen. The results of surface area and pore size analysis showed that the specific surface area of CTAB increased slightly while the cumulative pore volume and average pore diameter increased significantly. The results of adsorption experiments showed that the two kinds of DETA bridged polysilsesquioxane materials showed excellent adsorption capacity for Au (Ⅲ), the static adsorption capacity was as high as 5 ~ 6mmol / g and the adsorption kinetics fit the pseudo second-order model. The isothermal Adsorption meets the Langmuir adsorption model.