Method for raising titanium dioxide film self-cleaning glass photocatalytic activity

A technology of photocatalytic activity and titanium dioxide, which is applied in the fields of glass, self-cleaning and air purification, ceramics or other building materials surface antifouling, which can solve the problems of no self-cleaning, low catalytic activity, increased coating time and cost, etc. Achieve the effect of improving photocatalytic activity, reducing coating cost and reducing coating time

Inactive Publication Date: 2003-03-05
WUHAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the uniformity, light transmittance and adhesion of the film are affected, and the process is difficult to control and repeat, and the coating time and cost increase
Some people also treat the glass substrate with nitric acid or sulfuric acid to partially replace the sodium ions in the glass, form a diffusion barr

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Example 1: Accurately measure a certain amount of butyl titanate (17.02ml) and diethanolamine (4.08ml) and dissolve in absolute ethanol (67.28ml), and stir for 2h; then add water and absolute ethanol The mixture (0.9ml of water and 10ml of absolute ethanol) was stirred for 30min to obtain a stable, uniform, clear and transparent yellow-orange sol. TiO 2 The composition of the sol is: Ti(OC 4 h 9 ) 4 :EtOH:H 2 O:NH(C 2 h 5 Oh) 2 =1:26.5:1:1 (molar ratio). TiO 2 The film is prepared from the above-mentioned sol precursor by dipping and pulling with a clean glass slide as the substrate, and the pulling speed is 2mms -1 , after drying the wet film at 100°C for 10min, put it in a muffle furnace at 500°C, keep it warm for 1h, take it out and let it cool down to room temperature naturally, then you can get TiO 2 film. Repeat the above operations to obtain films with different thicknesses. The film was then subjected to surface acid treatment, the acid used was 1MH ...

Embodiment 2

[0008] Embodiment 2: except that substrate adopts quartz glass, other conditions are exactly the same as embodiment 1, when on the quartz glass surface TiO 2 When the thickness of the film is 0.50um, TiO before and after sulfuric acid solution treatment 2 The reaction rate constants of the films are 0.0263 and 0.0355, respectively.

Embodiment 3

[0009] Embodiment 3: In order to increase TiO 2 The porosity, specific surface area and surface hydroxyl content of the film surface, in the above TiO 2 Add an appropriate amount of organic high polymer polyethylene glycol (PEG) (molecular weight is 2000) as template agent in the solution, other conditions are exactly the same as embodiment 1, then prepare TiO 2 film. TiO 2 The composition of the sol is shown in Table 1.

[0010]

sample

Ti(OC 4 h 9 ) 4

/ ml

NH(C 2 h 5 O) H) 2

/ ml

h 2 o

/ ml

C 2 h 5 Oh

/ ml

PEG

/ g

T 05 D. 1 h 1 E.

17.02

4.08

0.9

77.28

0

T 05 D. 1 h 1 EP 025

17.02

4.08

0.9

77.28

0.25

2000PEG

T 05 D. 1 h 1 EP 05

17.02

4.08

0.9

77.28

0.5

2000PEG

T 05 D. 1 h 1 EP 10

17.0...

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PUM

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Abstract

The method for raising optical catalytic activity of titanium dioxide film self-cleaning glass is applicable to the fields of building window, car glass and optical glass, uses glass as base body forcoating film and includes the following steps: using sol-gel method to prepare titanium dioxide film, impregnating glass surface and coating film, acid treating surface of titanium dioxide film, washing with water and drying, the sodium ion of titanium dioxide film surface can be controlled in 0.3%, carbon content of film surface is reduced, hydroxy content of surface is increased, so that the optical catalytic activity of the glass can be greatly raised. It features signal method, effective and easy-to-control glass quality.

Description

technical field [0001] The present invention relates to the preparation method of highly active titanium dioxide film self-cleaning glass such as architectural glass, automobile glass, eye glass, optical glass, etc., and the present invention also relates to the fields of antifouling, self-cleaning and air purification on the surface of glass, ceramics or other building materials . Background technique [0002] People often use various cleaning agents to clean window glass, curtain wall glass or automobile glass. The reason is that it is difficult to use pure water to clean the organic pollutants on the glass surface due to the adhesion of organic pollutants in the air to the glass surface. Surfaces are cleaned. If a layer of highly active transparent titanium dioxide film is coated on the surface of ordinary soda-lime glass, it is quite useful for self-cleaning of the glass surface and indoor and outdoor air purification. There are many me...

Claims

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Application Information

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IPC IPC(8): C03C17/23
Inventor 赵修建余家国吕在国袁启华徐麟
Owner WUHAN UNIV OF TECH
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