Method for preparing self-cleaning glass coating
A glass coating and self-cleaning technology, applied in coatings, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of low sunlight utilization rate and low light transmittance, etc. Achieve the effect of improving photocatalytic efficiency, high light transmittance, and increasing photocatalytic efficiency
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[0021] A method for preparing a self-cleaning glass coating, comprising the following steps:
[0022] Preparation of titania sol:
[0023] Doping B, Zr, and Ce elements into the titanium dioxide sol;
[0024] coating the doped titania sol on the glass surface to generate a titania coating; and
[0025] Heat to cure the titanium dioxide coating on the glass surface.
[0026] Wherein, the titanium dioxide sol is prepared by a sol-gel method, and comprises the following steps:
[0027] Add solvent, ethylenediamine, titanium isopropoxide, and water to the vessel in that order; and
[0028] Make the mixed solution in the container evenly mix and fully react to obtain TiO 2 Sol.
[0029] Wherein, the solvent is one or more combinations of absolute ethanol, methanol, and acetone, and the mixed liquid in the container is uniformly mixed and fully reacted for 1-3 hours by a stirrer to obtain TiO 2 For the sol, the mass ratio of the added solvent, ethylenediamine, titanium isoprop...
Embodiment 1
[0038] a) Preparation of TiO by sol-gel method 2 Sol: Add absolute ethanol, DEA (ethylenediamine), titanium isopropoxide and water in order, and then stir with a stirrer for 2 hours to fully react to obtain TiO 2 Sol, added in a mass ratio of 20:4:3:2.
[0039] b) Doping B, Zr, and Ce elements into the titania sol: respectively adding the doping source boric acid, zirconium isopropoxide, and cerium nitrate into the titania sol in a) above, then adding the catalyst, and stirring for 1 h. The addition ratio of the catalyst is 10% of the mass ratio of titanium. The catalyst is nitric acid.
[0040] c) Coating film on the glass surface: the glass is dipped in the titanium dioxide sol, so that the doped titanium dioxide sol is coated on the glass surface to form a titanium dioxide coating.
[0041] d) Curing: The glass is cured in an oven, the curing temperature is set at 500° C., the heating rate is 1° C. / min, and the temperature is kept for 1 hour.
Embodiment 2
[0043] a) Preparation of TiO by sol-gel method 2 Sol: Add methanol, DEA (ethylenediamine), titanium isopropoxide and water in order, and then stir with an ultrasonic stirrer for 1 hour to fully react to obtain TiO 2 The sol is added in a mass ratio of 18:5:2:1.
[0044] b) Doping B, Zr, and Ce elements into the titania sol: respectively adding the doping source boric acid, zirconium isopropoxide, and cerium nitrate into the titania sol in a) above, then adding the catalyst, and stirring for 1 h. The catalyst addition ratio is 6% of the mass ratio of titanium. The catalyst is sulfuric acid.
[0045] c) Glass surface coating film: the sol is sprayed on the glass surface by spraying, so that the doped titanium dioxide sol is coated on the glass surface to form a titanium dioxide coating.
[0046] d) Curing: The glass is cured in an oven at a curing temperature of 450° C., a heating rate of 2° C. / min, and a heat preservation of 1 hour.
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