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Preparation method of phosphotungstic acid doped titanium dioxide photocatalyst

A titanium dioxide and photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of cumbersome steps and high energy consumption, achieve strong photocatalytic activity, improve separation efficiency, The effect of improving the photon quantum efficiency

Inactive Publication Date: 2018-06-08
XIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of phosphotungstic acid-doped titanium dioxide photocatalyst, which solves the problem that the method steps of phosphotungstic acid-doped titanium dioxide in the prior art are relatively complicated and consume more energy

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  • Preparation method of phosphotungstic acid doped titanium dioxide photocatalyst

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Embodiment 1

[0030] Step 1. Add a certain amount of butyl titanate dropwise into absolute ethanol to make it uniformly dispersed, and add a small amount of glacial acetic acid and triethanolamine dropwise, and stir. The stirring speed is 800r / min, and the stirring time is 20min. The obtained liquid is recorded as liquid A, wherein the volume ratio of absolute ethanol to butyl titanate is 2:1, glacial acetic acid is 10% of the volume of butyl titanate, and triethanolamine is 5% of the volume of butyl titanate. %;

[0031] Step 2, adding a certain amount of dehydrated alcohol into the mixed solution of a small amount of distilled water and glacial acetic acid, stirring, the stirring speed is 800r / min, the stirring time is 10min, leave standstill, the liquid obtained is recorded as B liquid, wherein, no The volume of hydroalcohol is 50% of the volume of dehydrated alcohol in step 1, and the volume of distilled water is 15% of the volume of dehydrated alcohol in step 2, and glacial acetic acid...

Embodiment 2

[0036] Step 1. Add a certain amount of butyl titanate dropwise into absolute ethanol to make it uniformly dispersed, and add a small amount of glacial acetic acid and triethanolamine dropwise, and stir. The stirring speed is 800r / min, and the stirring time is 40min. The obtained liquid is recorded as liquid A, wherein the volume ratio of absolute ethanol to butyl titanate is 2:1, glacial acetic acid is 20% of the volume of butyl titanate, and triethanolamine is 10% of the volume of butyl titanate. %;

[0037] Step 2, adding a certain amount of dehydrated alcohol into the mixed solution of a small amount of distilled water and glacial acetic acid, stirring, the stirring speed is 1200r / min, the stirring time is 30min, leave standstill, the liquid obtained is recorded as B liquid, wherein, no The volume of hydroalcohol is 50% of the volume of dehydrated alcohol in step 1, and the volume of distilled water is 15% of the volume of dehydrated alcohol in step 2, and glacial acetic ac...

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Abstract

The invention discloses a preparation method of a phosphotungstic acid doped titanium dioxide photocatalyst. The preparation method comprises the steps: firstly, dropwise adding a certain amount of butyl titanate into absolute ethanol to make butyl titanate uniformly dispersed, dropwise adding a small deal of acetic acid and triethanolamine, and carrying out stirring and standing to obtain a liquid marked as a liquid A; then, adding a certain amount of absolute ethanol into a small deal of mixed solution of distilled water and acetic acid, and carrying out stirring and standing to obtain a liquid marked as a liquid B; secondly, slowly dropwise adding the liquid B into the liquid A, slowly dropwise adding a certain amount of phosphotungstic acid solution into the mixed solution, firstly, carrying out magnetic stirring to uniformly disperse the solution, and then, carrying out ultrasonic treatment for 30-50min to obtain a uniform, transparent and white sol; and finally, carrying out ageing, drying, heat treatment and grinding on the sol to obtain a light gray phosphotungstic acid doped titanium dioxide powder. By using the preparation method, the problem that a method for doping phosphotungstic acid into titanium dioxide is relatively complex in step and relatively high in energy consumption in the prior art is solved.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a preparation method of phosphotungstic acid doped titanium dioxide photocatalyst. Background technique [0002] The photocatalytic oxidation method utilizes the strongly reducing / oxidizing electron / hole pairs generated by the excitation of semiconductor catalysts under light to achieve the complete degradation of pollutants, and has broad application prospects in water treatment. At present, titanium dioxide photocatalyst has attracted extensive attention of researchers at home and abroad because of its advantages of low price, strong stability, no secondary pollution, and complete mineralization of some refractory biodegradable pollutants. Antibacterial deodorization, self-cleaning and other fields have broad application prospects. However, there are still defects such as narrow spectral response range and low quantum efficiency, which limit the practicalit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/188
CPCB01J27/188B01J35/39
Inventor 万甜程文任杰辉王敏师雯洁刘吉开张晓涵
Owner XIAN UNIV OF TECH
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