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A method for surface modification of titanium dioxide

A technology of titanium dioxide and surface modification, which is applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problem of negligible degradation of organic matter, and achieve industrial production, cheap raw materials, and cheap prices Effect

Active Publication Date: 2021-05-07
GUANGDONG ROI OPTOELECTRONICS TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Commercial titanium dioxide usually has excellent UV photocatalytic properties and is cheap and easy to obtain, but its ability to degrade organic matter is negligible under visible light conditions

Method used

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  • A method for surface modification of titanium dioxide
  • A method for surface modification of titanium dioxide
  • A method for surface modification of titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Using 5nm titanium dioxide powder as raw material, the surface modified titanium oxide was prepared.

[0047] Drop 2 mL of 0.1 mol / L nitric acid solution into 50 mL of deionized water, and stir thoroughly to obtain an electrolyte solution. Add 7 mL of 0.1 mol / L nitric acid solution dropwise into 60 mL of deionized water, and stir thoroughly to obtain a buffer solution.

[0048] Such as figure 2 As shown, two titanium rod cathodes are symmetrically placed on both sides of the platinum sheet anode to assemble a parallel discharge system. The two rod-shaped titanium cathodes used are both 4 mm in diameter and 20 cm in length. Put two titanium rod cathodes into the corundum tube, and only the tip part with a length of 0.8cm is not covered by the corundum tube. The size of the plate-shaped titanium anode used is 0.1*2*2cm 3 .

[0049] Pour 2g of 5nm titanium dioxide powder and electrolyte solution into the electrolytic cell, and stir evenly to obtain a mixed solution, an...

Embodiment 2

[0053] Using 50nm titanium dioxide powder as raw material, the surface modified titanium oxide was prepared.

[0054] Drop 2 mL of 0.1 mol / L nitric acid solution into 50 mL of deionized water, and stir thoroughly to obtain an electrolyte solution. Add 7 mL of 0.1 mol / L nitric acid solution dropwise into 60 mL of deionized water, and stir thoroughly to obtain a buffer solution.

[0055] Such as figure 2 As shown, two titanium rod cathodes are symmetrically placed on both sides of the platinum sheet anode to assemble a parallel discharge system. The two rod-shaped titanium cathodes used are both 4 mm in diameter and 20 cm in length. Put two titanium rod cathodes into the corundum tube, and only the tip part with a length of 0.8cm is not covered by the corundum tube. The size of the plate-shaped titanium anode used is 0.1*2*2cm 3 .

[0056] Pour 2g of 50nm titanium dioxide powder and electrolyte solution into the electrolytic cell, and stir evenly to obtain a mixed solution, ...

Embodiment 3

[0060] Using 100nm titanium dioxide powder as raw material, the surface modified titanium oxide was prepared.

[0061] Drop 2 mL of 0.1 mol / L nitric acid solution into 50 mL of deionized water, and stir thoroughly to obtain an electrolyte solution. Add 7 mL of 0.1 mol / L nitric acid solution dropwise into 60 mL of deionized water, and stir thoroughly to obtain a buffer solution.

[0062] Such as figure 2 As shown, two titanium rod cathodes are symmetrically placed on both sides of the platinum sheet anode to assemble a parallel discharge system. The two rod-shaped titanium cathodes used are both 4 mm in diameter and 20 cm in length. Put two titanium rod cathodes into the corundum tube, and only the tip part with a length of 0.8cm is not covered by the corundum tube. The size of the plate-shaped titanium anode used is 0.1*2*2cm 3 .

[0063] Pour 2g of 100nm titanium dioxide powder and electrolyte solution into the electrolytic cell, and stir evenly to obtain a mixed solution...

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Abstract

The invention relates to the technical field of synthesis of photocatalyst materials, in particular to a method for modifying the surface of titanium dioxide. Titanium dioxide powder is dispersed in an electrolyte solution, and cathode glow discharge plasma is generated in the electrolyte solution, which is electrolyzed by cathode glow discharge plasma Water generates a hydrogen atmosphere and performs hydrogenation reduction treatment on titanium dioxide. After the discharge is completed, titanium oxide with a shell-core structure is obtained. The present invention uses cathode glow discharge plasma to realize one-step rapid preparation of visible light-responsive reducing titanium oxide, without adding any chemical reducing agent in the preparation process, which is a green and environmentally friendly preparation technology; the preparation process is simple, and only consumes electric energy and a small amount Liquid, and the raw material titanium dioxide does not need to be self-made, one-step surface modification treatment is directly carried out, which is convenient for mass production. The method for modifying the surface of titanium dioxide of the present invention does not need to perform high-temperature reduction treatment on titanium dioxide in a hydrogen atmosphere, improves the safety of the preparation process, and is convenient for industrial production.

Description

technical field [0001] The invention relates to the technical field of synthesis of photocatalyst materials, in particular to a method for modifying the surface of titanium dioxide. Background technique [0002] Titanium dioxide (TiO 2 ), as the most common semiconductor catalyst, is widely used in air purification, sewage treatment and other fields because of its low price, non-toxicity, stable chemical properties and other characteristics. The principle of titanium dioxide environmental purification, that is, photocatalytic reaction, is that titanium dioxide absorbs organic substances in the environment, such as dyes, formaldehyde, etc., and under light conditions, it generates photogenerated electron-hole pairs by itself, and induces the production of highly active substances, such as superoxide radicals, Hydroxyl radicals. These highly active substances undergo a redox reaction with the organic matter adsorbed by titanium oxide, and the product is CO 2 、H 2 O. At pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/047C01G23/04C25B1/04B82Y40/00B01J21/06B01J37/18
CPCB01J21/063B01J35/004B01J37/18B82Y40/00C01G23/043C01G23/08C01P2004/64C25B1/04Y02E60/36
Inventor 曾和平冯光
Owner GUANGDONG ROI OPTOELECTRONICS TECH CO LTD
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