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Full-spectral response type ammonium tungsten bronze-titanium dioxide composite photocatalyst

A technology of titanium dioxide and tungsten bronze, which is applied in the field of photocatalytic materials, can solve the problem of not considering the photocatalytic effect, etc., and achieve the effects of improved catalytic activity, low equipment requirements, and simple operation.

Inactive Publication Date: 2016-10-26
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention only discussed the infrared absorption shielding effect of ammonium tungsten bronze, and did not consider whether it has photocatalytic effect

Method used

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  • Full-spectral response type ammonium tungsten bronze-titanium dioxide composite photocatalyst
  • Full-spectral response type ammonium tungsten bronze-titanium dioxide composite photocatalyst
  • Full-spectral response type ammonium tungsten bronze-titanium dioxide composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 0.25g of ammonium paratungstate, add it to 40mL of ethylene glycol, and stir magnetically at 190°C for 60 minutes to fully dissolve to obtain a clear and transparent liquid; after the liquid is cooled to room temperature, add 0.4g of nano-titanium dioxide with photocatalytic activity, after ultrasonic dispersion Stir for 100 minutes to obtain a suspension; add 20 mL of acetic acid to the suspension, stir for 30 minutes to obtain a mixed liquid, transfer the mixed liquid to a hydrothermal kettle, and conduct a hydrothermal reaction at a temperature of 200 °C for 40 hours; Ionized water and ethanol were used to centrifuge and wash the precipitate respectively, and dry to obtain the ammonium tungsten bronze-titanium dioxide composite photocatalyst. The X-ray diffraction spectrum of the photocatalyst, such as figure 1 as shown, figure 1 It shows that the X-ray diffraction peak of the photocatalyst is composed of the diffraction peaks of titanium dioxide and ammonium ...

Embodiment 2

[0041] Add 0.1g of ammonium tungstate to 20mL of ethylene glycol, stir magnetically at 80°C for 90min, fully dissolve to obtain a clear and transparent liquid; add 0.1g of P25 commercial titanium dioxide powder after cooling to room temperature, and stir for 20min after ultrasonic dispersion to obtain a suspension Turbid liquid; add 10mL of acetic acid to the suspension and stir for 10min to obtain a mixed liquid, transfer the mixed liquid to a hydrothermal kettle, and conduct a hydrothermal reaction at 240°C for 10h; successively wash with deionized water and ethanol by centrifugation The precipitate was dried to obtain ammonium tungsten bronze-titanium dioxide composite photocatalyst.

Embodiment 3

[0043] Add 1.0g of ammonium metatungstate to 80mL of ethylene glycol, stir magnetically at 200°C for 75 minutes, and fully dissolve to obtain a clear and transparent liquid; after cooling to room temperature, add 1.0g of nano-titanium dioxide with photocatalytic activity, and stir after ultrasonic dispersion 60min to obtain a suspension; add 80mL of acetic acid to the suspension and stir for 60min to obtain a mixed liquid, transfer the mixed liquid to a hydrothermal kettle, and conduct a hydrothermal reaction at 160°C for 72h; sequentially use deionized water and The precipitates were centrifuged and washed with ethanol, and dried to obtain the ammonium tungsten bronze-titanium dioxide composite photocatalyst.

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Abstract

The invention discloses a full-spectral response type ammonium tungsten bronze-titanium dioxide composite photocatalyst. The photocatalyst is prepared by comprising the following steps: adding 0.1-1.0g of ammonium tungsten into 20-80mL of ethylene glycol, and performing magnetic stirring at 80-200 DEG C; cooling to room temperature, then adding 0.1-1.0g of raw material titanium dioxide, performing ultrasonic dispersion and stirring to obtain suspension; adding 10-80mL of acetic acid into the suspension and stirring to obtain mixed liquid, transferring the mixed liquid into a hydrothermal kettle, and performing hydrothermal reaction for 10-72h at 160-240 DEG C; and centrifuging and washing precipitate sequentially by using deionized water and ethyl alcohol, and drying to obtain the ammonium tungsten bronze-titanium dioxide composite photocatalyst. The phtocatalyst has photocatalytic activity under ultraviolet light, visible light and even infrared spectra, so that the full-spectrum absorption and utilization of sunshine can be realized; and the photocatalyst has wide application prospects in the fields of environment pollution treatment and purification, environment-friendly functional materials, and the like.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and relates to a high-efficiency photocatalytic material powder with ultraviolet, visible and infrared full-spectrum response. The material can not only utilize ultraviolet light in sunlight, but also has Photocatalytic materials with strong photocatalytic effect. Background technique [0002] With the improvement of the level of science and technology and the progress of human development, the problem of environmental pollution has become more and more serious. Toxic and difficult to degrade, pollutants are more widely present in the air, which is harmful to biological safety and ecological system, and restricts the progress of society. Semiconductor materials represented by titanium dioxide have the advantages of high photocatalytic activity, good stability, and low cost, and have become a research hotspot. However, due to the large band gap (>3.0eV), traditional photocatal...

Claims

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Application Information

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IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/393B01J35/39
Inventor 刘斌王育华杨林芬刘桐垚李昊张益宏
Owner LANZHOU UNIVERSITY
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