Preparation method and application of vanadium and nitrogen co-doped titanium dioxide dispersion liquid

A titanium dioxide and co-doping technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of easy recombination of electrons and holes, limited spectral sensing range, low optical quantum efficiency, etc. The effect of improving photocatalytic efficiency and large reaction volume

Inactive Publication Date: 2017-02-08
BELLFLOWERHANGZHOUENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Currently commercially available photocatalyst products are basically prepared by uniformly dispersing pure nano-titanium dioxide particles in an aqueous solution through a certain process. The photocatalyst products made by this method have two major defects: one is that it has a limited spectral sensing range, and most of them only It can respond to the ultraviolet band, and the natural ultraviolet light only accounts for 3% to 4% of the sunlight reaching the ground, so its utilization rate of light is very low; moreover, due to the easy recombination of electrons and holes generated by light excitation, resulting in The light quantum efficiency is also very low; the second is that since the reaction of the photocatalyst needs to be carried out under light conditions, its effect will be greatly reduced in nighttime environments and dark areas such as furniture interiors

Method used

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  • Preparation method and application of vanadium and nitrogen co-doped titanium dioxide dispersion liquid
  • Preparation method and application of vanadium and nitrogen co-doped titanium dioxide dispersion liquid
  • Preparation method and application of vanadium and nitrogen co-doped titanium dioxide dispersion liquid

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Embodiment 1

[0022] A preparation method of vanadium nitrogen co-doped titanium dioxide dispersion liquid, comprising the following steps:

[0023] A, 7.6 g thiourea and 12.0 g urea were dissolved in 150 ml deionized water to obtain solution a;

[0024] B. 15.62 g of vanadyl acetylacetonate was added to solution a under conditions of stirring in an ice bath to obtain solution b;

[0025] C. Drop 22 ml (0.065 mol) tetrabutyl titanate solution into solution b at a rate of 2 drops per second to obtain mixed solution c;

[0026] D. Stir the mixed solution c for 24 hours and then continue aging for 48 hours; obtain a gel-state solution d;

[0027] E. Place the solution d in a vacuum desiccant and dry it at 80°C to obtain a solid e;

[0028] F. High-speed ball milling of solid e into powder, then calcined at 500°C for 2 hours, and grinding to obtain powder f;

[0029] G. Stir and disperse 0.05 g of carboxylate directly in 100 g of deionized water, then add 5 g of powder f, and ultrasonically ...

Embodiment 2

[0033] A preparation method of vanadium nitrogen co-doped titanium dioxide dispersion liquid, comprising the following steps:

[0034] A, 9.6 g of ammonium carbonate and 10.6 g of ammonium chloride are dissolved in 150 ml of deionized water to obtain solution a;

[0035] B. Add 8.5 g of vanadyl acetylacetonate to solution a under conditions of stirring in an ice bath to obtain solution b;

[0036] C. Drop 13.6 ml (0.040 mol) tetrabutyl titanate solution into solution b at a rate of 2 drops per second to obtain mixed solution c;

[0037] D. Stir the mixed solution c for 12 hours and then continue aging for 24 hours; obtain a gel-state solution d;

[0038] E. Put the solution d in a vacuum desiccant, and dry it at 70°C to obtain a solid e;

[0039] F. Mill the solid e into powder by high-speed ball milling, then calcinate at 400°C for 1 hour, and grind to obtain powder f;

[0040] G. Stir and disperse 0.025 g of carboxylate directly in 100 g of deionized water, then add 5 g o...

Embodiment 3

[0044] A preparation method of vanadium nitrogen co-doped titanium dioxide dispersion liquid, comprising the following steps:

[0045] A, 7.6 g thiourea and 9.6 g ammonium carbonate are dissolved in 150 ml deionized water to obtain solution a;

[0046] B. Add 33.4g of vanadyl acetylacetonate to solution a under conditions of stirring in an ice bath to obtain solution b;

[0047] C. Drop 22 ml (0.065 mol) tetrabutyl titanate solution into solution b at a rate of 2 drops per second to obtain mixed solution c;

[0048] D. Stir the mixed solution c for 36 hours and then continue to age for 72 hours; obtain a gel-state solution d;

[0049]E. Put the solution d in a vacuum desiccant, and dry it at 90°C to obtain a solid e;

[0050] F. High-speed ball milling of solid e into powder, then calcined at 600°C for 3 hours, and grinding to obtain powder f;

[0051] G. Directly stir and disperse 0.05 g of phosphate in 100 g of deionized water, then add 5 g of powder f, and ultrasonically...

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Abstract

The invention discloses a preparation method of a vanadium and nitrogen co-doped titanium dioxide dispersion liquid, and a rapid and continuous formaldehyde decomposition photocatalyst emulsion prepared by using the vanadium and nitrogen co-doped titanium dioxide dispersion liquid. The preparation method of the vanadium and nitrogen co-doped titanium dioxide dispersion liquid has the advantages of low cost, simple process, less heating process and less energy consumption. The vanadium and nitrogen co-doped titanium dioxide dispersion liquid adopted by the photocatalyst emulsion plays a role in catalysis in visible lights, so the photocatalysis efficiency is greatly improved. The periphery of an amino-terminated hyperbranched polymer in the photocatalyst emulsion contains a large amount of amino groups, so the dose of a reaction of the emulsion and formaldehyde is large, generated polymer is stable, and reverse release of formaldehyde is avoided. The photocatalyst emulsion can directly react with formaldehyde, can decompose formaldehyde and other harmful gases in air in a dark area in a dark period, can greatly reduce the formaldehyde content of plates from the headstream, and can continuously improve the quality of air.

Description

technical field [0001] The invention relates to the field of environmental protection products, in particular to a preparation method of a vanadium nitrogen co-doped titanium dioxide dispersion and a photocatalyst emulsion capable of rapidly and continuously decomposing formaldehyde prepared by using the vanadium nitrogen co-doped titanium dioxide dispersion. Background technique [0002] With the development of society and the improvement of people's living standards, people's requirements for the living environment are getting higher and higher. Because the decoration and decoration materials used in new houses use a lot of adhesives, paints and other materials, it seriously causes formaldehyde, benzene, toluene, etc. The excess of harmful substances, especially formaldehyde, has a large amount, deep hiding, and slow release. The cycle is generally as long as 3-15 years, which has seriously endangered human health. [0003] Currently commercially available photocatalyst ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J31/06B01D53/86B01D53/72
CPCB01J27/24B01D53/8668B01D2257/708B01D2258/06B01J31/063B01J35/004
Inventor 陈果于雄胜
Owner BELLFLOWERHANGZHOUENVIRONMENTAL PROTECTION TECH
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