Preparation of titanium dioxide sol a kind of simp

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Source:http://www.mhcocm.com Related link:What is the function of zinc oxide among Ceramic glaze
Titanium dioxide film is a hot research field of today's materials, the current literature using titanium alkoxides as raw materials, availability of milk-like solution sol gel, the concentration of low turbidity large and titanium dioxide, which is mainly amorphous. And: (1) amorphous titanium dioxide photocatalytic activity is low, make the crystallization of titanium dioxide, must be calcined at high temperature. Grains of titanium dioxide under high temperature rapid growth, therefore,nickel oxide, be particles of titanium dioxide film, a large grain size of titanium dioxide. (2) used as carrier material is limited, so do not heat the plastic material can not be crystalline titanium dioxide film.

Sol - gel method for the preparation of titanium dioxide thin films commonly used method, but the organic matter content is high,nickel oxide, production of thin film to be enough to burn organic matter, so to get a certain thickness of the film must be impregnated or coated several times. The invention provides a preparation of high density, high stability and transparent method of titanium dioxide sol. Main feature is the use of titanium in the inorganic salt as raw materials, in mild reaction conditions are amorphous white precipitate, using inorganic acid as phase change to promote reconciliation and sizing agents are anatase titanium dioxide nanocrystalline sol. Titanium dioxide sol grain size and crystallinity can be inorganic acid solutions of gum concentration and temperature to control the gel time of reconciliation. Under the optimized conditions, the obtained grain size of 5 nm (anatase) in a transparent sol concentration of 1M.

Room temperature by impregnation method, you can create a variety of substrate films of titanium dioxide nanoparticles. Creative and advanced technology
:
1. Preparation of high concentration of titanium dioxide sol,nickel oxide, prepared by the sol does not contain organic matter, without high temperature calcination method of burning organic matter, can include a variety of plastic substrates, including the formation of particles of titanium dioxide film.
2. High stability and transparency, at room temperature for 1 year will not form precipitation, the proportion of 1:100 dilution with distilled water nor the formation of precipitation and large aggregates.
3. Sol of anatase titanium dioxide, to avoid the amorphous titanium dioxide sol calcination and crystallization in phase change due to rapidly grow the grain, can be ultra-fine particles of titanium dioxide nanocrystalline film.
4. High stability of the sol prepared by the water as the medium, can easily achieve doping, in a variety of substrates prepared transition metal oxide / titanium dioxide or a noble metal / titanium dioxide composite films of nanocrystalline particles.