OBJECTIVES To exploit the functionalities of oxide nanoparticles formed in solution
The hydrothermal synthesis in autoclave allows a controlled and selective activation of sol-gel mechanisms leading to fine and calibrated functional oxide NPs. For instance, crystalline TiO2 (anatase) nanoparticles (NPs) are formed in solution, which can be deposited as optical grade photocatalytic thin films through low temperature protocols. TiO2 NPs can also be embedded in a sol-gel derived silica matrix leading to TiO2-SiO2 nano-composite films. Such films exhibit a unique natural, persistent, and photo-regenerable superhydrophilicity. Both approaches address self-cleaning surface applications.
M. Houmard, D.C.L.Vasconcelos, W.L.Vasconcelos, G.Berthomé, J.C.Joud, M.Langlet, Water and oil wettability of hybrid organic-inorganic titanate-silicate thin films deposited via a sol-gel route, Surf. Sci., 603 (2009) 2698.
M. Houmard, G. Berthomé, JC. Joud, M. Langlet, Enhanced Cleanability of Super-hydrophilic TiO2-SiO2 Composite Surfaces Prepared via a Sol-Gel Route, Surf. Sci., 605 (2011) 456.
C. Holtzinger, L. Rapenne, P. Chaudouët, G. Berthomé, J.C. Joud, M. Langlet, Influence of the sol composition on the natural superhydrophilicity of sol-gel derived TiO2-SiO2 nanocomposite thin films, Emerging Mat. Res., 1(3) (2012) 127.
C. Holtzinger, L. Rapenne, P. Chaudouët, G. Berthomé, M. Langlet, Thickness effects in naturally superhydrophilic TiO2-SiO2 nanocomposite films deposited via a multilayer sol-gel route, J. Sol-gel Sci. Technol., 64(2) (2012) 465.