Preparation method of nano titanium dioxide photocatalyst thin film

A nano-titanium dioxide and photocatalyst technology, applied in the field of photocatalysis, can solve the problems of insufficient photocatalyst adhesion, insufficient adhesion, short service life, etc., and achieve the advantages of shortened removal time, high formaldehyde removal rate and reduced raw material cost. Effect

Active Publication Date: 2014-12-24
江苏恒智纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] At present, commonly used photocatalyst carriers include activated carbon felt, activated carbon sponge, paper honeycomb, aluminum honeycomb, aluminum foam, wire mesh, etc. short

Method used

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  • Preparation method of nano titanium dioxide photocatalyst thin film
  • Preparation method of nano titanium dioxide photocatalyst thin film
  • Preparation method of nano titanium dioxide photocatalyst thin film

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Embodiment 1

[0045] Embodiment 1: a kind of preparation technology of nano titanium dioxide photocatalyst film, comprises the following steps:

[0046] Step 1. Put 5 grams of metal titanium into a 500 ml glass beaker, add 85 ml of hydrogen peroxide aqueous solution, the molar ratio of metal titanium to hydrogen peroxide is 1:8, and the metal titanium is granular sponge titanium;

[0047] Step 2, place the glass beaker in an ice-water bath, the temperature of the ice-water bath is controlled at about 10°C, and the mixed solution is stirred at a medium speed to form an intermediate reactant;

[0048] Step 3: Pour 75ml of ammonia water into a 500ml flask with a branch pipe and a piston, place the flask in a temperature-controlled hot water bath at about 60°C, heat the ammonia to form ammonia vapor, and the ammonia vapor enters the medium-speed stirring tank through the branch pipe In the intermediate reactant, when the pH value of the intermediate reactant reaches about 9, close the piston on...

Embodiment 2

[0061] Embodiment 2: a kind of preparation technology of nano titanium dioxide photocatalyst film, comprises the following steps:

[0062] Step 1. Put 5 grams of metallic titanium into a glass beaker, add 107 mL of hydrogen peroxide aqueous solution to form a mixed solution, the molar ratio of metallic titanium to hydrogen peroxide is 1:10, and the metallic titanium is granular sponge titanium;

[0063] Step 2, place the glass beaker in an ice-water bath, the temperature of the ice-water bath is controlled at about 12°C, and stir the mixed solution at a medium speed to form an intermediate reactant;

[0064] Step 3: Pour 91mL of ammonia water into a flask with a branch pipe and a piston, place the flask in a hot water bath, control the temperature of the water bath at about 60°C, and heat to volatilize the ammonia to form ammonia vapor, which enters the intermediate reaction through the branch pipe In the product, adjust the pH value of the intermediate reactant to the range o...

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Abstract

The invention discloses a preparation technology of a nano titanium dioxide thin film. The preparation technology comprises the steps of oxidizing metal titanium Ti with zero valent into tetravalent titanium TiO2<+> by using hydrogen peroxide, further complexing TiO2<+> with hydrogen peroxide to form a water-soluble TiO[(H2O2)]<2+> yellow complex, removing excessive hydrogen peroxide and ammonia during evaporation to obtain a yellow complex colloid, then converting the TiO[(H2O2)]<2+> yellow complex into pure white Ti(OH)4 aqueous emulsion by high-pressure hydrothermal reaction under the temperature of 150-200 DEG C, adding inorganic acid to adjust the PH of the emulsion to be in a range from 2 to 4, controlling the temperature of a water bath at 60-80 DEG C, continuously stirring for 3-6 hours to gradually colloidize the Ti(OH)4 aqueous emulsion into a nano titanium dioxide aqueous colloid, spraying the nano titanium dioxide aqueous colloid to the wavy surface of a multihole ceramic plate and the inner wall of a conical hole through a spraying gun, and sintering under the temperature of 400-550 DEG C to form the firm nano titanium dioxide thin film. In a reaction process, production of wastewater and waste gas is avoided, and the crystallizing degree is high; the nano titanium dioxide thin film is extremely high in light catalysis activity and high in film forming performance.

Description

technical field [0001] The invention relates to a preparation process of a nano-titanium dioxide photocatalyst film, belonging to the technical field of photocatalysis. Background technique [0002] The application of titanium dioxide photocatalytic technology to the control of environmental pollution, especially to completely decompose various toxic and harmful organic pollutants in air and water, has become one of the most effective means recognized by countries all over the world. [0003] Titanium dioxide photocatalysis technology is an advanced oxidation decomposition technology. The surface of titanium dioxide particles produces charge separation after absorbing ultraviolet light, generating active free radicals with strong oxidizing ability. Its photocatalytic activity is caused by these active free radicals, which can non-selectively oxidize and decompose various organic pollutants, and its oxidation ability is much higher than that of ozone and hydrogen peroxide. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J35/00B82Y40/00
Inventor 程黎放童惠君
Owner 江苏恒智纳米科技有限公司
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