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Composite photocatalyst hydrosol

A composite photocatalyst and hydrosol technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. and other problems, to achieve the effect of simple process, excellent photocatalytic performance and good stability

Inactive Publication Date: 2016-05-25
天津发洋环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But TiO 2 The semiconductor bandgap width of the semiconductor is 3.2 electron volts, which can only absorb the light in the ultraviolet region, so it affects the photocatalytic performance of the photocatalyst material
[0003] At present, there are two forms of photocatalyst products: powder and sol. The photocatalyst in the form of sol is convenient for spraying construction and is widely used, but photocatalyst sol also has the disadvantage of narrow light absorption area. How to improve TiO 2 The photocatalytic activity is the key to improving the photocatalytic performance of photocatalyst products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A composite photocatalyst hydrosol is composed of nano-rare earth yttrium hydrosol and nano-titanium dioxide hydrosol, the solid content of the nano-rare-earth yttrium hydrosol is 1wt%, and the solid content of the nano-titanium dioxide hydrosol is 1.5wt%. The weight ratio of the nanometer rare earth water yttrium sol to the nanometer titanium dioxide water sol is 1:80.

[0022] The preparation steps are as follows:

[0023] (1) Preparation of nano rare earth yttrium hydrosol: concentration of yttrium chloride solution is 1.0mol / L, pH is 2.0, take 440ml of this solution and put it in a 35°C water bath, add 8ml of hydrogen peroxide, keep stirring, take 170ml of concentrated ammonia water, add 940ml of water After mixing, heat at 28°C and quickly pour into the above solution, adjust the temperature to 65°C, take a water bath for 3 hours, rise to 95°C, stir for 35 minutes, filter with suction, wash, and add 10ml of concentrated nitric acid with a concentration of 69% to th...

Embodiment 2

[0028] A kind of composite photocatalyst hydrosol, is made up of nano-rare earth yttrium hydrosol and nano-titanium dioxide hydrosol, the solid content of described nano-rare earth yttrium hydrosol is 1.5wt%, and the solid content of described nano-titanium dioxide hydrosol is 1.5wt%, so The weight ratio of the nanometer rare earth water yttrium sol to the nanometer titanium dioxide hydrosol is 1:100.

[0029] The preparation steps are as follows:

[0030] (1) Preparation of nano-rare earth yttrium hydrosol: the same step as in Example 1;

[0031] (2) Preparation of nano-titanium dioxide hydrosol: the same step as in Example 1;

[0032] (3) Preparation of composite photocatalyst hydrosol: First, accurately weigh nano-rare earth yttrium hydrosol and nano-titanium dioxide hydrosol according to the mass ratio, then add the two hydrosols into a sealed glass container, stir at room temperature for 1 hour, mix evenly, and finally heat In a glass container, the temperature is contr...

Embodiment 3

[0035] A composite photocatalyst hydrosol is composed of nano-rare earth yttrium hydrosol and nano-titanium dioxide hydrosol, the solid content of the nano-rare-earth yttrium hydrosol is 2wt%, and the solid content of the nano-titanium dioxide hydrosol is 1.5wt%. The weight ratio of the nanometer rare earth water yttrium sol to the nanometer titanium dioxide water sol is 1:100.

[0036] The preparation steps are the same as in Example 1.

[0037] The composite photocatalyst hydrosol in this example has good stability, the particle size distribution is 5-10nm, and the photocatalytic performance is excellent. The photocatalytic performance (degradation rate of the target substance) of the hydrosol was increased by 42%.

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Abstract

The present invention provides a composite photocatalyst hydrosol, which comprises a nanometer rare earth hydrosol and a nanometer titanium dioxide hydrosol according to a weight ratio of 1:80-100. The preparation method comprises: accurately weighing a nanometer rare earth hydrosol and a nanometer titanium dioxide hydrosol according to a certain mass ratio, sequentially adding the two hydrosols into a sealed glass container, carrying out room temperature stirring for 1 h, uniformly mixing, heating the glass container, controlling the temperature at 90-110 DEG C, carrying out constant speed stirring, and carrying out a reaction for 6-8 h so as to prepare the composite photocatalyst hydrosol. The composite photocatalyst hydrosol of the present invention has advantages of excellent photocatalytic performance, good stability, and simple preparation process.

Description

technical field [0001] The invention belongs to the field of photocatalyst materials and relates to a composite photocatalyst hydrosol. Background technique [0002] Photocatalyst is a kind of nanoscale TiO 2 It is a general term for photo-semiconductor materials with photocatalytic function. Under the action of light, it has a strong catalytic degradation function, can degrade toxic and harmful gases, kill a variety of bacteria, and also has deodorization, anti-pollution, air purification, etc. Function. But TiO 2 The semiconductor bandgap width of the semiconductor is 3.2 electron volts, which can only absorb light in the ultraviolet region, so it affects the photocatalytic performance of the photocatalyst material. [0003] At present, there are two forms of photocatalyst products: powder and sol. The photocatalyst in the form of sol is convenient for spraying construction and is widely used, but photocatalyst sol also has the disadvantage of narrow light absorption ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J35/12B01J35/27
Inventor 杨立新
Owner 天津发洋环保科技有限公司