Preparation of oxide aerogel catalysts using supercritical CO_2 drying and their application

The new supercritical CO_2 drying technology provides a green and safe method to develop these structure-controllable materials.Recent researches on the process parameters and the mechanisms are reviewed.Preparation of superfine ZrO_2 aerogel catalysts using supercritical CO_2 drying is introduced.Application prospects of oxide aerogel catalysts are also discussed.