摘要
采用两步水解法制备了高比表面积的TiO2/SiO2混合氧化物,利用TGA和低温N2的吸附对粉体进行了表征。研究了预水解阶段加水量及醇洗、水洗过程对粉体孔结构的影响,发现加水量较少时,孔径分布变宽,水洗样品的比表面积和孔径均比醇洗样品的大。
The TiO_2/SiO_2 composite with high specific surface area was prepared by a two step hydrolysis method. The structure of the samples is analysed by TGA and low temperture N_2 absorption-desorption method. The influence of the prehydrolysis step with different water amount and the washing with water or ethanol on pore structure is studed. The experimental results show that the pore size distrubition is wide when the water amount is large. In addition, the specific surface area and average pore size of samples washed with water are larger than those washed with ethanol.
出处
《化学世界》
CAS
CSCD
北大核心
2004年第7期339-341,364,共4页
Chemical World
基金
科技部基础研究重大项目前期研究专项基金资助(CCA0034000)
