[Spectrum study on the agglomeration-prevention of the nanosized titania photocatalyst]

In this paper, nanocrystal titania aerogel was prepared through sol-gel extracted by supercritical carbon dioxide, and three different nanosized particles, newly born aerogel particle, titania particles preserved in the form of aerogel for one year and preserved in the form of newly born aerogel powder particle for one year, were characterized by FT-Raman, FTIR, and FS. The degradation of methyl orange by photocatalysis is regarded as a model reaction, and the result indicates that the particles preserved in the form of aerogel can prevent the agglomeration of super-hydrophility of TiO2 surface very well and maintain photocatalystic activity of the newly born particles.