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Method for preparing TiO2 photocatalytic film doped with non-metallic element

A technology of photocatalytic thin films and non-metallic elements, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of single doping elements and difficult control of doping amount

Active Publication Date: 2006-09-06
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wherein the atmosphere roasting method (Hongyan Liu, LianGao, J.Am.Ceram.Soc.87 [8] 2004 1582-1584) is a kind of overall better method, but generally speaking its doping element is relatively single, and its The amount of doping is not easy to control

Method used

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  • Method for preparing TiO2 photocatalytic film doped with non-metallic element

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Add 20mL of titanium tetrachloride dropwise to 200mL of 6M hydrochloric acid, and stir at a constant temperature of 40°C to obtain TiO 2 Sol, aged at 80°C for 4 hours;

[0022] Add hydrochloric acid to polydipropylene dimethyl ammonium chloride to prepare a cationic solution, wherein the concentration of polydipropylene dimethyl ammonium chloride is 0.005 mol / L, and the concentration of hydrogen ions is 0.1 mol / L;

[0023] Add hydrochloric acid to sodium polystyrene sulfonate (PSS) to configure an anion solution, wherein the concentration of sodium polystyrene sulfonate is 0.005 mol / L, and the concentration of hydrogen ions is 0.1 mol / L;

[0024] Sonicate the quartz glass in a mixture of 20mL 98% concentrated sulfuric acid and 10mL 30% hydrogen peroxide at 80°C for 10 minutes, then in deionized water for 10 minutes, and dry in the air;

[0025] Immerse the treated quartz glass support body in the polydipropylene dimethyl ammonium chloride solution for 10 minutes, so th...

Embodiment 2

[0031] Mix butyl titanate, absolute ethanol, deionized water and acid catalyst in a molar ratio of 1:100:10:0.5, stir and heat at 80°C for 4 hours to obtain positively charged TiO 2 Sol, aged at 80°C for 4 hours;

[0032] Add hydrochloric acid to polyvinyl alcohol and polydipropylene dimethyl ammonium chloride to form a polycation aqueous solution. The concentration of polyvinyl alcohol and polydipropylene dimethyl ammonium chloride is 0.01M, and the hydrogen ion concentration is 0.0001M ;

[0033] Add hydrochloric acid to sodium polystyrene sulfonate (PSS) and sodium polyacrylate (PAAS) to form a polyanion aqueous solution. The concentrations of sodium polystyrene sulfonate (PSS) and sodium polyacrylate (PAAS) are both 0.01M. The hydrogen ion concentration is 0.0001M;

[0034] After the ceramic microfiltration membrane matrix is ​​dried, it is fired at 500-550°C for 2-5 hours, and the obtained SiO 2 -Al 2 o 3 Inorganic composite membrane matrix was washed twice with acet...

Embodiment 3

[0042] Add 20mL of titanium tetrachloride dropwise to 200mL of 6M hydrochloric acid, and stir at a constant temperature of 40°C to obtain TiO 2 Sol, aged at 80°C for 4 hours;

[0043] Add hydrochloric acid to polydipropylene dimethyl ammonium chloride to prepare a cationic solution, wherein the concentration of polydipropylene dimethyl ammonium chloride is 0.05 mol / L, and the concentration of hydrogen ions is 0.0001 mol / L;

[0044] Add hydrochloric acid to polystyrene sodium sulfonate (PSS) to configure an anion solution, wherein the concentration of sodium polystyrene sulfonate is 0.05mol / L, and the concentration of hydrogen ions is 0.0001mol / L;

[0045] Sonicate the ITO glass in 30mL of 98% concentrated sulfuric acid and 10mL of 30% hydrogen peroxide mixture at 80°C for 30 minutes, then in deionized water for 30 minutes, and dry in the air;

[0046] Immerse the treated ITO glass support body in the polydipropylene dimethyl ammonium chloride solution for 20min, so that the s...

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Abstract

The invention relates to a method for preparing TiO2 film with visual light response and non-metallic element doping. The positive TiO2 nanometer particle and the polyanion electrolyte are alternatively deposited on the supports that dipped by the polymer-cation electrolyte, to cycle 0-60 times to attain the polymer electrolyte / TiO2 film, and sintered in the N2, CO2, NH3 and doping with one or several of C, N, and S of polymer. The inventive film has better visual light catalyst property, and since the self-installment in earlier stage makes the doping elements selectable, and the film thickness is controllable, the amount of TiO2 is controllable too.

Description

technical field [0001] The present invention relates to a kind of TiO 2 The preparation method of thin film, especially relates to a TiO with visible light response containing non-metal element doping 2 The preparation method of the thin film, the prepared film can be directly applied to visible light photocatalytic degradation of organic matter. Background technique [0002] Since Japanese scholars Fujishima and Honda reported water photocatalytic hydrogen production on n-type semiconductor TiO2 single crystal electrodes in 1972, heterogeneous photocatalytic technology has aroused great interest of scientific and technological workers. In 1976, John H. Carey successfully applied photocatalytic oxidation technology to the dechlorination of polychlorinated biphenyls, and since then photocatalytic degradation of organic matter has made great progress. Before the 1990s, photocatalysis used ultraviolet light, which accounts for 4% of the solar spectrum, or artificial light sou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05B3/02B05D3/00C03C17/23C04B41/50B01J21/06
Inventor 徐南平金万勤华卉
Owner NANJING UNIV OF TECH
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