Process for preparing self-cleaning titanium dioxide photo-catalytic coating liquid

Abstract

The invention relates to a method for producing a self-cleaning TiO2 photochemical catalysis coating, blowing to photochemical catalysis material chemical manufacturing technical field. Use TiCl4 as the row material,add into muriatic acid solution with their ratio being 1.3g / cm2 and Ti cintent bing 2.86mol / L use Ti in each liter of TiO4 muriatic acid solution as standard to express its gram molecule density;drop it into the four-moth glass container with back floing cooling pipe and agitating blade with 500ml water without ion in it,increase the temperature while heat it,with the temperature being 55-95deg.C and the stirring speed being 200 rmp;when approaches the boiling point,open the back flowing cooling water and keep the temperature for 1h,generating ice-cream sol which is the diluted by alcohol water solution to acquire sol containing particle content (2%), add into organic silicon sticker, by stirring averagely the product is made.

Description

technical field [0001] The invention relates to a method for manufacturing a self-cleaning titanium dioxide photocatalytic coating liquid, and belongs to the technical field of photocatalytic material chemical manufacturing technology. Background technique [0002] Photocatalytic technology is an environmentally friendly new catalytic technology in the 21st century. Under the action of light, the strong oxidizing groups generated on the surface of semiconductor materials are used to oxidize and degrade most toxic and harmful organic substances, as well as inorganic harmful substances such as nitrogen oxides and sulfur oxides, and finally achieve the purpose of efficiently controlling environmental pollution; and can Make the surface of the material produce sterilization, self-cleaning and super-hydrophilic functions. In terms of environmental protection, such as waste water and gas purification, air purification, etc. have broad application prospects. The researchers found...

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Problems solved by technology

For example, the Chinese patent (patent number 03150646.1) discloses a method for preparing a vanadium-doped titanium dioxide hydrophilic film. 2 Sol, prepare thin film on slide glass surface by pulling method, then through heat treatment, obtain the glass with self-cleaning effect, this method is raw material with titanate etc., and cost is higher, affects its popularization and application; Chinese patent (application number 021112246.8, 03150646.1) with TiO 2 and SnO 2 The photocatalytic self-cleaning coating was prepared on the surface of glass with mixed sol, but it needs to be calcined at a high temperature of 300 ° C to 800 ° C, which limits the application of this technology on the surface of heat-labile polymer substrates such as polycarbonate; China Patent (Patent No. 00115361.7) uses magnetron sputtering method to prepare self-cleaning glass coated with titanium dioxide film, but special equipment is required, and the operation cost is high; Chinese patent (Patent No. 01110064.8) discloses a TiO2 2 The preparation method of sol-gel coating, but the transparency of the coating is relatively poor, and it is not suitable for places with high transparency requirements, such as road noise barriers, window glass and other surfaces; at the same time, other methods such as Chinese patent 99800525.8 and Japanese patent WO00 / 10921 etc. have adopted the inorganic binder supporting photocatalyst mainly of polysiloxane, has utilized the stability of polysiloxane, but polysiloxane contains strong hydrophobic group, does not have film formation for a period of time Super-hydrophilic, the photocatalyst needs to be activated by strong light to make the surface super-hydrophilic