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

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 ...

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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

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