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在正硅酸乙酯(TEOS)和硝酸铜(Cu(NO3)2.3H2O)复合溶胶体系中引入干燥控制化学添加剂(DCCA)N,N-二甲基甲酰胺(DMF),采用溶胶-凝胶法(Sol-Gel Method)和常压干燥工艺,制备了具有高比表面积的Cu-SiO2复合气凝胶.研究了铜负载质量、催化剂浓度及热处理等不同条件对Cu掺杂SiO2复合气凝胶结构的影响.结果表明,气凝胶颗粒呈均匀分布,其孔径主要分布在2～15nm之间;Cu含量的增加有利于CuO晶粒的生成以及比表面和孔体积的减小;催化剂的浓度较高时,硅氧网络的聚合程度随催化剂浓度的增大而减弱.高温热处理后复合气凝胶表现出良好的热稳定性.
(DCCA) N, N-dimethylformamide (DMF) was introduced into the composite sol system of TEOS and Cu (NO3) 2.3H2O, and the sol- Sol-Gel Method and Atmospheric Pressure Drying Process were used to prepare Cu-SiO2 composite aerogels with high surface area. The influences of Cu loading, catalyst concentration and heat treatment on the properties of Cu-doped SiO2 aerogels The results show that the aerogels particles are uniformly distributed and their pore sizes are mainly distributed between 2 and 15 nm. The increase of Cu content is beneficial to the formation of CuO grains and the reduction of specific surface area and pore volume. The concentration of catalyst At higher temperatures, the degree of polymerization of the siloxane network diminishes with increasing catalyst concentration, and the composite airgel shows good thermal stability after high temperature heat treatment.