Nano-TiO2-coated unidirectional porous glass structure prepared by freeze drying and solution infiltration

abstract

A unidirectional porous glass structure coated with a nanometer TiO2 thin film on pore walls was successfully fabricated by a two-step process. Firstly, a water-based slurry of sheet glass was frozen while controlling the growth direction of ice crystals, and then sublimation of the ice under vacuum formed the green body. The green body was subsequently sintered to produce porous glass with unidirectional pores. Secondly, the sintered porous glass was infiltrated by a titanium (IV) butoxide solution, and then dried and calcined at a moderate temperature to generate a nanometer TiO2 film on pore walls. The present porous glass with nanometer TiO2 has more total surface area than the TiO2 film on glass plates, which is believed to be more effective in the phtotocatalysis application for air or water purification.

keywords

REINFORCING MECHANISMS; THIN-FILMS; CERAMICS; DECOMPOSITION; OXIDATION; COATINGS

subject category

Materials Science

authors

Deng, ZY; Fernandes, HR; Ventura, JM; Kannan, S; Ferreira, JMF

our authors

Share this project:

Related Publications

We use cookies for marketing activities and to offer you a better experience. By clicking “Accept Cookies” you agree with our cookie policy. Read about how we use cookies by clicking "Privacy and Cookie Policy".