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A kind of solid photocatalyst and preparation method thereof

A photocatalyst, solid technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. It can improve the photocatalytic performance, strong oxidation ability and good catalytic effect.

Active Publication Date: 2017-12-05
鹤山市顺鑫实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the currently commercially available photocatalysts are aqueous dispersions of titanium dioxide with low solid content; there are also some solid products with poor dispersibility
Moreover, these products generally have shortcomings such as weak photocatalysis, low light utilization rate, unsatisfactory bactericidal effect, and no antibacterial effect. Therefore, there is an urgent need for a new solid photocatalyst that can solve the above-mentioned shortcomings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 1000mL of ethanol-water mixed solvent (mass ratio of ethanol to water: 70:30), 3mL of sodium phosphate buffer solution with a pH of 2.5, and 10g of glycerol into a reaction kettle with a reflux device, raise the temperature to 35°C, and stir to drip Add 220g of tetrabutyl titanate, drop it for 2 hours, keep it warm for 2 hours, then add 0.1g of nano-silver (particle size: 25-35nm), and carry out hydrolysis reaction at 40°C for 4 hours. To above 90°C, remove ethanol, etc., take out the product, and dry at 110°C for 4 hours to obtain the finished product.

Embodiment 2

[0025] Add 1000mL of ethanol-water mixed solvent (mass ratio of ethanol to water: 75:25), 4mL of potassium phosphate buffer solution with a pH of 5.0, and 15g of ethylene glycol into a reaction kettle with a reflux device, raise the temperature to 40°C, and drop while stirring Add 180g of tetrabutyl titanate, drop it for 2 hours, keep it warm for 2 hours, then add 0.08g of nano-silver (particle size is 25-35nm), and carry out hydrolysis reaction at 35°C for 5 hours. To above 90°C, remove ethanol, etc., take out the product, and dry at 120°C for 2 hours to obtain the finished product.

Embodiment 3

[0027] Add 1000mL of ethanol-water mixed solvent (mass ratio of ethanol to water: 80:20), 5mL of potassium phosphate buffer solution with a pH of 5.8, and 13g of 1,2-propanediol into a reaction kettle with a reflux device, raise the temperature to 45°C, and stir Add 175g of tetrabutyl titanate dropwise, drop it for 2 hours, keep it warm for 2 hours, then add 0.05g of nano-silver (particle size: 25-35nm), and carry out hydrolysis reaction at 45°C for 3 hours. After the reaction, heat up to the bottom of the kettle The temperature rises above 90°C, ethanol etc. are removed, the product is taken out, and dried at 110°C for 4 hours to obtain the finished product.

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Abstract

The invention discloses a solid photocatalyst and a preparation method thereof. The method specifically includes the steps of mixing and heating ethyl alcohol-water solvent, phosphate buffer and polyhydric alcohols, dropwise adding tetrabutyl titanate at the same time, then adding nano-silver, conducting a hydrolysis reaction, and conducting purifying and drying to obtain a finished product after the reaction ends. The solid photocatalyst is small in titanium dioxide grain size, good in catalysis effect, higher in oxidation capacity and better in sterilization effect, pH is close to neutralism, and no corrosion effect can be generated.

Description

technical field [0001] The invention belongs to the field of chemical materials, in particular to a solid photocatalyst and a preparation method thereof. Background technique [0002] With the advancement of science and technology and the improvement of living standards, people have higher and higher requirements for the comfort of the living environment. In interior decoration, due to the extensive use of composite materials, it is inevitable to face the third problem of "indoor air pollution". Secondary environmental pollution, most of the pollutants are formaldehyde, benzene, toluene, xylene and other organic volatile substances. At the same time, the growth of some harmful bacteria and fungi also brings harm to people's life and health. Photocatalyst (nano-titanium dioxide) can catalyze water or oxygen in the air into photoactive radicals with strong oxidizing ability, such as hydroxyl radicals, superoxide anion radicals, and active oxygen, under the irradiation of short...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/50
CPCB01J23/002B01J23/50B01J2523/00B01J2523/18B01J2523/47
Inventor 刘德强林国旺李秋凯白晓春
Owner 鹤山市顺鑫实业有限公司
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