Preparation and characterization of photocatalytic TiO 2 /glymo nanocomposite films
The reflux method was utilized for the synthesis of 5%
Sn-doped TiO22_{2} nanopowder. Surfaces of the TiO22_{2} particles were
modified with 3-glycidoxypropyltrimethoxysilane (glymo) and glass surfaces
were coated with this solution by a spin-coating process. Molar ratios of
TiO22_{2}:glymo were 0.25, 0.5, 2.5, and 7.5 in the films. Nanocomposite
films were cured at 130 ∘∘^{\circ}C. Adhesions of the obtained films were
classified as 5B and pencil hardness increased with the increase in the
ratio of the TiO22_{2} in the films. Film thickness decreased from 5 μμ\mu m
to 0.3 μμ\mu m when TiO22_{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
TiO22_{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.
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