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Preparation method of tin oxide/silicon oxide photocatalyst porous nano composite material

A nano-composite material and tin oxide technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, oxygen preparation, etc., can solve difficult commercial applications, limited service life, and influence of adhesion and other problems, to achieve the effect of long service life, less equipment investment and simple process

Pending Publication Date: 2022-08-09
GANZHOU RUIDE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] In order to overcome the difficulty in recycling and high cost of liquid-phase photocatalyst materials in the prior art, it is difficult to commercialize them. Porous and foam materials are used as carriers to coat and adhere nano-photocatalyst materials to their surfaces, which can be reused many times. Influence, service life is also limited, its more obvious shortcomings in wastewater treatment, the invention provides a kind of preparation method of tin oxide / silicon oxide photocatalyst porous nano-composite material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]20% acid pH 3.0 silica sol 300g, add 20% acid pH 3.0 nano-SnO with a dispersion particle size of 4nm 2 30 g of dispersion liquid, add 200 g of deionized water, stir for 30 min at 45 °C, add 5 g of citric acid, stir for 5 min at 45 °C, add AR NHOH to adjust pH to 6.5, stop stirring, let stand for cooling for 8 hours to form a gel, gel 125 ℃ aging for 30 hours.

[0039] The aged gel was dried at 125°C, calcined at 650°C for 3 hours, pulverized and sieved to obtain a white photocatalyst tin oxide / silicon oxide porous powder material.

Embodiment 2

[0041] 30% acid pH 3.5 Silica soluble acid plus 200g pure water, add 10% acid pH 3.0 nano SnO with particle size 3nm 2 Dispersion 100g, stirred at 70°C for 20min, added 5g polyethylene glycol 400, stirred at 50°C for 30min, added triethanolamine to adjust pH to 6.0, allowed to stand at 110°C for 24 hours, dried at 120°C, and calcined at 600°C For 5 hours, pulverize and sieve to obtain a powdery nano-tin oxide / silicon oxide porous nanocomposite material.

Embodiment 3

[0043] 25% acid pH 3.0 silica sol 500g, add 300g deionized water, add 15% acid pH 2.0 Nano SnO with a dispersed particle size of 3nm 2 100g, stirred at 60°C for 30 minutes, added 15g of lignin trimethyl quaternary ammonium salt, stirred at 60°C for 20min, added ammonia water to adjust the pH to 6.5, stood at 100°C for 40 hours of aging, dried at 130°C, pulverized, passed through Sieve and bake at 550°C for 2 hours to obtain white nano-tin oxide photocatalyst porous silica gel powder. The powder uses 50 g of 20% silica sol liquid as a binder to form spherical photocatalyst porous silica gel balls with a diameter of 4 mm on a disc granulator.

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Abstract

The invention relates to the field of photocatalytic porous silica gel materials, in particular to a preparation method of a tin oxide / silicon oxide photocatalyst porous nano composite material. The technical problems that in the prior art, due to the fact that a liquid-phase photocatalyst material is difficult to recycle, high in cost and difficult to commercialize, a porous and foam material serves as a carrier to coat and adhere a nanometer photocatalyst material to the surface of the porous and foam material, the nanometer photocatalyst material can be repeatedly used, but the service life is limited due to the influence of binding force are solved. According to the technical scheme, the preparation method comprises the following steps: adding a nano tin oxide dispersion liquid into an acidic silica sol solution, fully stirring for uniform reaction, adding a template agent, uniformly stirring, adjusting the pH value, aging to form gel, and drying, roasting and crushing the gel to obtain the tin oxide photocatalyst porous nano composite material. According to the invention, the nano tin oxide photocatalyst material dispersion liquid and the silica sol are mixed and reacted to form the nano composite material, so that the nano composite material does not fall off, the long-term repeated service life is long, and the use cost is reduced.

Description

technical field [0001] The invention relates to the field of photocatalytic porous silica gel materials, in particular to a preparation method of a tin oxide / silicon oxide photocatalytic porous nanocomposite material. Background technique [0002] Liquid-phase photocatalyst materials are difficult to recycle and high cost, and are difficult to commercialize. Porous and foam materials are used as carriers to coat and adhere nano-photocatalyst materials to the surface, which can be reused many times, but the service life is also limited due to the influence of adhesion. , which is more pronounced in wastewater treatment. [0003] Photocatalyst, also known as photocatalytic technology, is a new technology invented and developed 50 years ago. Photocatalyst technology is a technology for the broad-spectrum decomposition of organic matter in air or water by nano-photocatalyst materials under the irradiation of light. The final product is carbon dioxide and water, without secondar...

Claims

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Application Information

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IPC IPC(8): B01J23/14B01J21/08B01J35/02B01J35/08B01J35/10B01J37/03C01B3/04C01B13/02C02F1/30A61L9/18A62D3/17B01D53/86A62D101/20
CPCB01J23/14B01J21/08B01J23/002B01J37/036B01J37/0018C02F1/30C01B3/042C01B13/0207A62D3/17B01D53/86A61L9/18A62D2101/20B01D2258/06B01D2255/802B01J35/50B01J35/23B01J35/51B01J35/617B01J35/638B01J35/40B01J35/651B01J35/635B01J35/615B01J35/39Y02W10/37
Inventor 易鹤翔
Owner GANZHOU RUIDE CHEM
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