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Hydrothermal preparation method and product of film nano material with photocatalysis property

A nanomaterial and photocatalytic technology, which is applied in the field of hydrothermal preparation of thin film nanomaterials with photocatalytic properties, can solve problems such as lack of photocatalytic properties, and achieve the effects of firm bonding and improved ultraviolet photocatalytic properties.

Inactive Publication Date: 2013-03-13
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

WO 3 The conduction band position is below H + / H 2 Oxidation-reduction potential, so it does not have photocatalytic properties

Method used

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  • Hydrothermal preparation method and product of film nano material with photocatalysis property

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Experimental program
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Effect test

Embodiment 1

[0030] A method for preparing a thin film nanomaterial with photocatalytic properties by a hydrothermal method, wherein the photocatalytic properties are ultraviolet light and visible light photocatalytic properties, comprising the steps of:

[0031] Step 1: Dissolve 2.6g of sodium tungstate dihydrate solution in 40ml of deionized water as a concentration regulator, and adjust the concentration of sodium tungstate solution to 0.2 mol / L;

[0032] The second step: the sodium tungstate solution passes through the reactor containing the exchange column of 732 type cation exchange resin to obtain a yellow solution (H 2 WO 4 ·nH 2 O);

[0033] Step 3: Add 1ml of hydrogen peroxide as an acidity regulator to the tungstic acid solution, and adjust the pH of the tungstic acid solution to 1.5;

[0034] Step 4: Put the tungstic acid solution into the reaction kettle, add the base material glass sheet at the same time, and form WO on the glass sheet after hydrothermal reaction at 150°C ...

Embodiment 2

[0040] A method for preparing a thin film nanomaterial with photocatalytic properties by a hydrothermal method, wherein the photocatalytic properties are ultraviolet light and visible light photocatalytic properties, comprising the steps of:

[0041] Step 1: Dissolve 2.6g of sodium tungstate dihydrate solution in 40ml of deionized water as a concentration regulator, and adjust the concentration of sodium tungstate solution to 0.2 mol / L;

[0042] The second step: the sodium tungstate solution passes through the reactor containing the exchange column of 732 type cation exchange resin to obtain a yellow solution (H 2 WO 4 ·nH 2 O);

[0043]Step 3: Add 1ml of hydrogen peroxide as an acidity regulator to the tungstic acid solution, adjust the pH of the tungstic acid solution to 1.5, and add 3ml of 1mol / L phosphoric acid solution;

[0044] Step 4: Put the tungstic acid solution into the reaction kettle, add the base material glass sheet at the same time, and form WO on the glass ...

Embodiment 3

[0049] A method for preparing a thin film nanomaterial with photocatalytic properties by a hydrothermal method, wherein the photocatalytic properties are ultraviolet light and visible light photocatalytic properties, comprising the steps of:

[0050] Step 1: Dissolve the sodium tungstate dihydrate solution in the concentration regulator ethanol + deionized water, and adjust the concentration of the sodium tungstate solution to 0.3 mol / L;

[0051] The second step: the sodium tungstate solution passes through the reactor containing the exchange column of 732 type cation exchange resin to obtain a yellow solution (H 2 WO 4 ·nH 2 O);

[0052] Step 3: Add acidity regulator acetic acid to the tungstic acid solution, adjust the pH of the tungstic acid solution to 1.6, and add 2.0ml 1.5mol / L titanium tetrachloride solution;

[0053] Step 4: Put the tungstic acid solution into the reaction kettle, and add the base material glass sheet at the same time. After hydrothermal reaction at...

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Abstract

The invention relates to a hydrothermal preparation method and a product of a film nano material with a photocatalysis property. The preparation method comprises the following steps of: dissolving sodium tungstate solution in a concentration modifier, wherein the modified concentration of the sodium tungstate solution is 0.1 to 1.0mol / L; allowing the sodium tungstate solution to pass through an exchange column which accommodates cation exchange resin; adding an acidity modifier into tungstic acid solution, wherein the modified pH value of the tungstic acid solution is 1.2 to 2.0; putting the tungstic acid solution into a reaction kettle and adding a matrix material simultaneously; and performing hydrothermal reaction at the temperature of between 100 and 200 DEG C for 2 to 12 hours to form the film nano material with the ultraviolet light and visible light photocatalysis property on the matrix material. The crystal structure of the film product has orthogonal and hexagonal WO3.0.33H2O mixed crystal phases and has the equal grain size of less than 30 nanometers. A prepared film has the characteristics of extremely firm bonding with a substrate, no crack and the like and is uniform; and both the two crystal phases have obvious effects on the photocatalysis property.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a method and product for preparing thin film nanomaterials with photocatalytic properties by a hydrothermal method. The crystal structure of the nanomaterials is WO 3 0.33H 2 O. Background technique [0002] Nanophotocatalytic materials have extensive potential in the treatment of polluted water and air, and can be used in environmental protection and governance. Nano photocatalytic materials have a self-cleaning function when they are plated on substrates such as glass or ceramics to form a thin film. At present, the films prepared by existing methods have defects in firmness, uniformity and uniform thickness, which in turn affect their photocatalytic ability. Therefore, it is of great significance to explore a method that can prepare a firm and uniform photocatalytic film for the application of photocatalytic materials. [0003] The preparation methods of a variety o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/30C03C17/25C04B41/85
Inventor 贺蕴秋胡栋虎尹婷
Owner TONGJI UNIV
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