Unlock instant, AI-driven research and patent intelligence for your innovation.

Titania thin film possessing high catalytic activity under visible light and preparation method

A high catalytic activity, titanium dioxide technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high heat treatment temperature, waste of energy, difficulties in practical application, etc., and achieve high photocatalytic activity Effect

Inactive Publication Date: 2006-08-16
TSINGHUA UNIV
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the TiO prepared by this preparation method 2 The catalytic degradation performance of thin film materials needs to be well displayed under ultraviolet light irradiation, which brings great difficulties to practical applications.
And since TiO 2 The heat treatment temperature required in the film preparation process is relatively high (above 500 ° C), which not only wastes a lot of energy, but also limits the TiO 2 Application of Thin Films on Glass Substrates with Lower Softening Temperature

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0012] The invention provides a titanium dioxide thin film with high catalytic activity under visible light and a preparation method thereof. Technical concept of the present invention is such:

[0013] According to the semiconductor defect theory, the addition of Sb ions can change the TiO 2 The corresponding energy level structure enables it to expand and absorb in the range of visible light. And by sol-gel method on TiO 2 LiNO was added to the sol 3 method that can reduce TiO 2 The crystal transition temperature of the film from amorphous to anatase phase, and under low temperature heat treatment conditions, the denser anatase phase TiO 2 film. Therefore, simultaneously doping Sb and Li ions into TiO 2 After sol, TiO with higher photocatalytic performance can be obtained at a lower heat treatment temperature 2 film.

[0014] The composition of the titanium dioxide thin film with high catalytic activity is by weight percentage:

[0015] 10%-30% tetrabutyl titanate, ...

Embodiment 1

[0026] (1) Pour 54% ethanol, 15% tetrabutyl titanate, 15% acetylacetone and 1% hydrochloric acid into the reaction vessel, and stir at room temperature for 0.5-1 hour;

[0027] (2) Slowly pour 15% water into the solution prepared in step (1), and stir at room temperature for 1-2 hours;

[0028] (3) Add the sol to the coating equipment, clean the surface of the glass to be coated, and put it into the coating equipment to coat the film. Generally, the coating can be carried out by pulling method, rotation method, etc., and the glass after coating Heat treatment, the heat treatment temperature is 350 ° C, and naturally cooled to room temperature, that is, TiO 2 film.

Embodiment 2

[0030] (1) TiO 2 Sol preparation:

[0031] Take 15% of isopropyl titanate, 15% of acetylacetone, 50% of propanol, 15% of water and 1% of hydrochloric acid by weight percentage, and prepare with steps (1) and (2) in Example 1;

[0032] (2) Add 2% lithium nitrate and 2% antimony chloride to the sol prepared in step (1), and continue to stir for 2-4 hours;

[0033] (3) Coating film

[0034] With embodiment 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

This invention discloses a TiO2 film with high light catalytic activity under visible light and its preparation method. Li and Sb salt are added in TiO2 sol by sol-gel method to get TiO3 film with high catalytic activity. This invention provides a method for preparing TiO2 film with high light catalytic activity characterizing in reducing transformation temperature of TiO2 film and getting high catalytic degradation efficiency of methy1 orange decomposition as high as 32%-67% under visible light.

Description

technical field [0001] The invention belongs to the technical scope of photocatalyst material preparation, and in particular relates to a titanium dioxide thin film with high catalytic activity under visible light and a preparation method thereof. Background technique [0002] TiO 2 Nano-film is an important functional material, which has attractive application prospects in photocatalytic degradation. TiO2 based on sol-gel method 2 The thin film preparation method is the most widely used titanium dioxide thin film preparation method at present. However, the TiO prepared by this preparation method 2 The catalytic degradation performance of thin film materials needs to be well displayed under ultraviolet light irradiation, which brings great difficulties to practical applications. And since TiO 2 The heat treatment temperature required in the film preparation process is relatively high (above 500 ° C), which not only wastes a lot of energy, but also limits the TiO 2 Appli...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C23C20/08B01J21/06B01J37/02C09D1/02
Inventor 梁开明周锋王国梁
Owner TSINGHUA UNIV