成果简介：Monolithic titania (TiO2) aerogels with high surface area were successfully synthesized by the sol-gel process combined surface modification, followed by ambient pressure drying to remove the solvents from the gels. The effects of surface modification used polyethylene glycol (PEG) 2000 as surfactant on the gelation and microstructure of the aerogel were studied in detail. The resultant aerogel with the PEG 2000:TBOT (molar ratio) of 0.005 exhibits specific surface area as high as 495 m2∙g-1, apparent density of 0.716 g∙cm-3 and porosity of 81.6%. The crystallization of aerogels after heat-treatment does not spoil the monolithic shape and morphology of the aerogel basically, and the specific surface area still keeps a relative high value of 209 m2∙g-1. The facile route provides a low-cost strategy for the preparation of metal oxide aerogels with high surface area.

论文引用方式：Hui Yang, Wenjun Zhu, Sai Sun and Xing zhong Guo. Preparation of monolithic titania aerogels with high surface area by a sol– gel process combined surface modification. RSC Advances. 2014, 4, 32934-32940.

论文链接：http://pubs.rsc.org/en/content/articlehtml/2014/ra/c4ra03812f。