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Method for improving photocatalytic activity of titanium dioxide nanotube based on heteropoly acid modification

A photocatalytic activity, titanium dioxide technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems of environmental pollution by by-products and low material conversion rate , to achieve the effect of expanding the light absorption range, good photocatalytic performance, and small damage

Active Publication Date: 2021-06-29
佛山建投瑞通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its complex synthesis system leads to low material conversion rate, and it is easy to produce by-products to pollute the environment. Therefore, a simple method is used to combine solid acid catalysts with titanium dioxide nanotubes and modify them to improve the catalytic performance of titanium dioxide nanotubes. activity is still of great research interest

Method used

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  • Method for improving photocatalytic activity of titanium dioxide nanotube based on heteropoly acid modification
  • Method for improving photocatalytic activity of titanium dioxide nanotube based on heteropoly acid modification
  • Method for improving photocatalytic activity of titanium dioxide nanotube based on heteropoly acid modification

Examples

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Embodiment 1

[0023] A method based on the photocatalytic activity of phosphomolybdic acid modified titanium dioxide nanotubes, the specific steps are as follows:

[0024] (1) Under magnetic stirring, place 4g of commercial titanium dioxide in a mixture of 10mL, 3mol / L sulfuric acid and 10mL hydrogen peroxide for etching treatment to roughen the surface of the material, continue to oxidize for 6h, and then wash it, vacuum drying;

[0025] (2) Under magnetic stirring, mix and stir 15mL of absolute ethanol and 1g of phosphomolybdic acid for 30min until a white emulsion is formed, then add 15mL of 20% glucose solution and continue stirring for 10min to promote further dissolution of the heteropolyacid. Then add 4g of titanium dioxide nanotubes prepared by step (1), and add 0.5mol / L sulfuric acid to adjust the pH to 2, then ultrasonically disperse for 1h, then continue stirring for 5h, transfer to the reactor for solvothermal treatment, and the reaction ends Finally, wash the product with abso...

Embodiment 2

[0028] A method based on the photocatalytic activity of phosphotungstic acid modified titanium dioxide nanotubes, the specific steps are as follows:

[0029] (1) Under magnetic stirring, place 4g of commercial titanium dioxide in a mixture of 10mL, 3mol / L sulfuric acid and 10mL hydrogen peroxide for etching treatment to roughen the surface of the material, continue to oxidize for 6h, and then wash it, vacuum drying;

[0030] (2) Under magnetic stirring, mix 15mL of absolute ethanol and 0.5g of phosphotungstic acid for 30 minutes until a white emulsion is formed, then add 15mL of 20% glucose solution and continue stirring for 10 minutes to promote the further dissolution of the heteropoly acid , then add 3g of titanium dioxide nanotubes prepared by step (1), and add 0.5mol / L sulfuric acid to adjust the pH to 2, then ultrasonically disperse for 1h, then continue stirring for 5h, transfer to the reactor for solvothermal treatment, and react After the end, wash the product with a...

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Abstract

The invention discloses a method based on photocatalytic activity of heteropoly acid modified titanium dioxide nanotubes, and the preparation method comprises the following steps: treating the titanium dioxide nanotubes through oxidation etching and modifying the composite titanium dioxide nanotubes through heteropoly acid; and preparing the titanium dioxide nanotube catalyst with high structural stability and high catalytic activity through solvothermal synthesis and heat treatment, wherein the titanium dioxide nanotube catalyst has good photocatalytic hydrogen production performance in a wide photoresponse range.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide nanotubes and heteropolyacids, in particular to a method for modifying the photocatalytic activity of titanium dioxide nanotubes based on heteropolyacids. Background technique [0002] Titanium dioxide nanotubes are a material with an ordered array structure and good photochemical stability, which makes it widely valued by researchers in the field of titanium dioxide photocatalysis. Although the unique structure of titanium dioxide nanotubes makes it have a larger specific surface area and stronger adsorption capacity, it is still affected by the inherent properties of titanium dioxide, which can only absorb ultraviolet light and have a narrow photoresponse range, thus restricting The development space of titanium dioxide nanotubes is opened. [0003] Solid-state acid catalysts have been gradually used in various photoelectrocatalytic research fields due to their strong oxidation-reducti...

Claims

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Application Information

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IPC IPC(8): B01J31/18C01B3/04
CPCB01J27/19C01B3/042C01B2203/0277B01J35/39Y02E60/36
Inventor 蔡小冰
Owner 佛山建投瑞通科技有限公司