Preparation and characterization of photocatalytic TiO 2 /glymo nanocomposite films

Authors : Esin Akarsu, H. Erdem Çamurlu

Pages : 1265-1274

View : 14 | Download : 11

Publication Date : 9999-12-31

Article Type : Makaleler

Abstract :  The reflux method was utilized for the synthesis of 5% Sn-doped TiO 2 " role="presentation"> 2 2 _{2} nanopowder. Surfaces of the TiO 2 " role="presentation"> 2 2 _{2} particles were modified with 3-glycidoxypropyltrimethoxysilane (glymo) and glass surfaces were coated with this solution by a spin-coating process. Molar ratios of TiO 2 " role="presentation"> 2 2 _{2} :glymo were 0.25, 0.5, 2.5, and 7.5 in the films. Nanocomposite films were cured at 130 ∘ " role="presentation"> ∘ ∘ ^{\circ} C. Adhesions of the obtained films were classified as 5B and pencil hardness increased with the increase in the ratio of the TiO 2 " role="presentation"> 2 2 _{2} in the films. Film thickness decreased from 5 μ " role="presentation"> μ μ \mu m to 0.3 μ " role="presentation"> μ μ \mu m when TiO 2 " role="presentation"> 2 2 _{2} :glymo was increased from 0.25 to 7.5. The obtained films had sufficient mechanical integrity, and they were photocatalytically active and could degrade rhodamine B. The sample having a TiO 2 " role="presentation"> 2 2 _{2} :glymo ratio of 7.5 presented the highest photoactivity. Low-temperature curing brings the advantage of utilization of the films on polymer substrates and also there is no need for a barrier layer between the coating and the substrate.
Keywords : Photocatalytic film, glymo, TiO 2, hybrid coating, photocatalysis