介孔分子筛材料含有均匀的孔道和排列整齐的孔穴及较高的比表面积和孔容等特点，具有较强的吸附能力和吸附性能；PAMAM化合物属于胺型树枝状高分子，其结构中含有多个胺基官能团，且可形成笼状结构，与重金属离子配位可形成稳定性很强的螯合物，有利于重金属的吸附。然而PAMAM材料需通过回收，成本较高。本项目主要以可调控孔道结构的SBA-15、MCM-41等无机介孔材料为载体，通过化学修饰方法在介孔分子筛孔道中，合成具有枝状结构和笼状结构化合物，并通过化学嫁接改性，嫁接活性基团（如巯基、胺基、羧基等），增加吸附活性位点，并通过形成多个螯环增强吸附能力。通过负载型枝状化合物的合成即增强了对重金属的吸附，同时可通过过滤的方法使吸附剂得以回收，重复利用。通过深入研究活性吸附位、吸附强度、吸附材料表面性质等与重金属离子性质之间的关系，掌握吸附材料的构效关系及吸附机理，为新型吸附材料的设计与合成提供理论依据。

The mesoporous silica-based adsorbents were studied extensively due to their unique large surface areas, well-defined pore sizes and pore shapes as well as well-modified surface properties. Nowadays, more and more attraction has been focused on the function of mesoporous silica (SBA-15 and MCM-41) with various organic groups for effective adsorption of heavy metal ions. Polyamidoamine (PAMAM) dendrimers are highly branched, well-defined, synthetic macromolecular available in nanometer dimensions, which consist of globular macromolecules with three covalent bind components: a core, interior branch cells and terminal branch cells. PAMAM is a unique chelating agent because of its high density of nitrogen ligands and the possibility of attaching functional groups, such as primary amines, carboxylates and hydroxymates, which can result in a substantial increase of bonding capacity for a variety of toxic metal ions. But the dendrimers have to.be recycled by ultrafiltration membrane, which is inconvenient and expensive in application for removal of heavy metal. The project is synthesizing with PAMAM-SBA-15 and 2,3-Dimercaptosuccinic acid（DMSA）modified SBA-15 inorganic-organic hybrid materials for the removal of metal ions. Through the structural analysis of functional PAMAM-SBA materials and heavy metal adsorption properties, optimizations of synthesis and adsorption conditions are needed to improve heavy metal adsorption properties and adsorptive selectivity. Supported PAMAM-SBA-15 would enhance adsorption performance of heavy metal ions and can be easily recycled and reused. Through study of the active sites, adsorption strength , surface properties of the adsorbent materials and the nature of heavy metal ions , the structure-activity relationships and adsorption mechanism of adsorption will be revealed. The studies will be helpful for providing theoretical.basis for the design and synthesis of new adsorbent materials.