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Titanium dioxide surface modifying method

A titanium dioxide and surface modification technology, which is applied in the fields of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problem that the ability to degrade organic matter is very small, and achieves convenient industrial production, improved safety, and simple preparation process. Effect

Active Publication Date: 2019-04-26
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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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 photocatalysts and particularly relates to a titanium dioxide surface modifying method. A titanium dioxide powder is dispersed in an electrolyte, a cathode glow discharge plasma is produced in the electrolyte and electrolyzes water to produce a hydrogen atmosphere, the titanium dioxide is subjected to hydrogenation reduction in the hydrogen atmosphere, and the titanium oxide with a core-shell structure is obtained after finishing discharging. The cathode glow discharge plasma is used for rapidly preparing the visible-light response reductive titanium oxide in one step, no chemical reducing agent is added in the preparation process, and the method is a green environmentally-friendly preparation technique; the preparation process is simple, only the electric energy and a small quantity of liquid are consumed, the raw material of the titanium dioxide is not self-made, the surface of the titanium dioxide is directly modified, andthe mass production is implemented conveniently. By using the titanium dioxide surface modifying method, the titanium oxide is not required to be reduced at the high temperature in the hydrogen atmosphere, so that the safety of the preparation process is improved, and the industrial production is facilitated.

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 Applications(China)
IPC IPC(8): C01G23/047C01G23/04C25B1/04B82Y40/00B01J21/06B01J37/18
CPCC25B1/04B82Y40/00C01G23/043C01G23/08B01J21/063B01J37/18C01P2004/64B01J35/39Y02E60/36
Inventor 曾和平冯光
Owner GUANGDONG ROI OPTOELECTRONICS TECH CO LTD
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