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Method for preparing AgBr/PANI/TiO2 nano composite material with visible light catalytic activity

A nano-composite material and catalytic activity technology, applied in the field of new photocatalyst materials, can solve problems such as insufficient research, and achieve the effect of remarkable effect and simple preparation process.

Inactive Publication Date: 2009-04-22
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is not enough research on it
[0010] About the simultaneous modification of nano-TiO by silver bromide (AgBr) and polyaniline (PANI) 2 To prepare AgBr / PANI / TiO with visible light catalytic activity 2 Nanocomposite materials, there is no related report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 1.50g nano-TiO 2 Put the particles in a 1000mL four-neck flask, then add 200ml of deionized water, and use an ultrasonic cleaner to ultrasonically disperse for 30min. Slowly add 59mL of 0.02mol / L silver nitrate solution and 71mL of 0.05mol / L sodium bromide solution to the TiO 2 In the aqueous phase, the dropwise addition time is 3h, after 6h reaction, suction filtration, the product is washed with deionized water, and dried at 100°C to constant weight to obtain AgBr / TiO 2 Nanocomposite particles. Weigh AgBr / TiO 2 Put 1.00g of nanocomposite particles in a 250mL four-neck bottle, add 60mL of 1.0mol / L hydrochloric acid solution, ultrasonically disperse for 30min, and inject 11.4μL of aniline monomer into the four-necked bottle with a micro-syringe under ice-water bath conditions , stirred vigorously for 30min to make the aniline monomer in TiO 2 The surface is fully adsorbed, and then 3.7mL of potassium dichromate solution with a concentration of 10g / L is slowly a...

Embodiment 2

[0029] Weigh 1.50g nano-TiO 2 Put the particles in a 1000mL four-neck flask, then add 200ml deionized water, ultrasonically disperse for 30min, slowly add 94mL of 0.02mol / L silver nitrate solution and 113mL of 0.05mol / L sodium bromide solution to the TiO 2 In the aqueous phase, the dropwise addition time is 5h, suction filtration after 6h reaction, the product is washed with deionized water, and dried at 100°C to constant weight to obtain AgBr / TiO 2 Nanocomposite particles. Weigh 1.00 g of the above-mentioned composite particles into a 250 mL four-necked bottle, add 60 mL of hydrochloric acid solution with a concentration of 1.0 mol / L, ultrasonically disperse for 30 minutes, and inject 12.8 μL of aniline monomer into the four-necked bottle with a micro-syringe under ice-water bath conditions. In the bottle, stir vigorously for 30min to make the aniline monomer in TiO 2 The surface is fully adsorbed, and then 4.4mL of potassium dichromate solution with a concentration of 10g / ...

Embodiment 3

[0031] Weigh 1.50g nanometer TiO 2 Put the particles in a 1000mL four-neck flask, then add 200ml deionized water, ultrasonically disperse for 30min, slowly add 78mL of 0.02mol / L silver nitrate solution and 94mL of 0.05mol / L sodium bromide solution to TiO 2 In the aqueous phase, the dropping time is 4h, after 6h of reaction, suction filtration, the product is washed with 100ml of deionized water, and dried at 100°C to constant weight to obtain AgBr / TiO 2 Nanocomposite particles. Weigh 1.00 g of the above-mentioned composite particles into a 250 mL four-necked bottle, add 60 mL of hydrochloric acid solution with a concentration of 1.0 mol / L, ultrasonically disperse for 30 min, and inject 10.2 μL of aniline monomer into the four-necked bottle with a micro syringe In the bottle, stir vigorously for 30min to make the aniline monomer in TiO 2 The surface is fully adsorbed, and then 4.9mL of potassium dichromate solution with a concentration of 10g / L is slowly added dropwise under ...

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Abstract

The invention discloses a method for preparing an AgBr / PANI / TiO2 nanometer composite particle with catalytic activity of visible light and belongs to the technical field of new photocatalyst material. The photocatalyst prepared by the method has good effect of the photocatalytic degradation of organic pollutant under the visible light. The method comprises the following process: nanometer TiO2 is subjected to ultrasonic dispersion in deionized water; according to certain proportion, an aqueous silver nitrate solution and an aqueous sodium bromide solution are slowly dripped to a TiO2 suspending solution; after the solutions react for certain time, the prepared AgBr / PANI / TiO2 nanometer composite particle is separated; the composite particle, an aniline monomer and an oxidant solution are sequentially added into a hydrochloric acid solution while stirring at constant temperature; the surface of the composite particle is subjected to in-situ polymerization; and the reaction product is fully washed through hydrochloric acid, absolute ethyl alcohol and deionized water sequentially, is dried to constant weight and is ground to obtain the AgBr / PANI / TiO2 nanometer composite material. The method has the advantages that the preparation process is simple; and the AgBr / PANI / TiO2 nanometer composite particle has remarkable effect in the photocatalytic degradation of the organic pollutant under the visible light.

Description

technical field [0001] The present invention relates to a kind of AgBr / PANI / TiO with visible light catalytic activity 2 The invention relates to a preparation method of a nanocomposite material, which belongs to the technical field of new photocatalyst materials. Background technique [0002] Nano-TiO 2 With excellent corrosion resistance, ultraviolet shielding ability and high refractive index, it has a wide range of applications in fine ceramics, rubber, coatings, cosmetics, semiconductor catalytic materials, etc., especially as a photocatalytic material in the field of environmental governance. Broad application prospects. But TiO 2 As a photocatalytic material, there are certain limitations, such as the easy recombination of photogenerated electrons and holes, which leads to a decrease in catalytic efficiency, and the wide band gap limits its absorption wavelength to the ultraviolet region, which limits the full use of sunlight. [0003] In order to overcome these sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J21/06B01J27/08
Inventor 王德松罗青枝李雪艳安静鲍雷雷段彦栋
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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