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Preparation method of zirconium oxide-based adsorbing photocatalyst and photocatalyst

A photocatalyst, zirconia-based technology, used in physical/chemical process catalysts, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc. The preparation method is complex and other problems, to achieve the effect of good reusability, high stability and high repeatability

Inactive Publication Date: 2019-01-18
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome many disadvantages of the prior art such as high cost of raw materials, long process cycle, difficult control of the reaction process, poor catalytic activity of the sample, complex preparation method and high cost of the existing preparation method, the purpose of the present invention is to provide a zirconia-based adsorption light The preparation method of the catalyst and the photocatalyst, that is, the sol-gel technology combined with the heat treatment process is used to composite silicon dioxide and zirconium dioxide to prepare porous SiO 2 -ZrO 2 Composite materials, so as to significantly increase the specific surface area of ​​the material, improve the adsorption performance of the material to pollutants, increase the active sites, improve the light absorption and utilization efficiency of the material, and then improve the photocatalytic efficiency of the material, thus obtaining a high performance Zirconia-based adsorption photocatalyst

Method used

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  • Preparation method of zirconium oxide-based adsorbing photocatalyst and photocatalyst
  • Preparation method of zirconium oxide-based adsorbing photocatalyst and photocatalyst
  • Preparation method of zirconium oxide-based adsorbing photocatalyst and photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Configuration of PS ball suspension: add 6mL styrene and 0.2mL α-methacrylic acid to 100mL deionized water, heat and stir in an oil bath to 75°C, stabilize for five minutes, add 0.14g potassium persulfate, continue Stir for 8h.

[0037] (2) Configuration of the zirconium oxychloride precursor solution: according to the mass ratio of 1:1, take a certain mass of citric acid and zirconium oxychloride for use, and dissolve the citric acid and zirconium oxychloride in deionized water to obtain zirconium oxychloride precursor solution, magnetically stirred for 10-30min.

[0038] (3) Configuration of ethyl orthosilicate solution: Calculate the required amount of ethyl orthosilicate according to the molar ratio of zirconium oxychloride to ethyl orthosilicate 0.5:3, and measure a certain amount according to the volume ratio of 1:2 volume of tetraethyl orthosilicate and absolute ethanol, mix evenly, and magnetically stir for 30 minutes.

[0039] (4) Configuration of the sil...

Embodiment 2

[0047] (1) Configuration of PS sphere suspension: add 5mL styrene and 0.2mL α-methacrylic acid to 100mL deionized water, heat and stir in an oil bath to 75°C, stabilize for five minutes, add 0.14g potassium persulfate, continue Stir for 8h.

[0048] (2) Configuration of the zirconium oxychloride precursor solution: according to the mass ratio of 1:1.5, a certain mass of citric acid and zirconium oxychloride were weighed for use, and the citric acid and zirconium oxychloride were dissolved in deionized water to obtain The zirconium oxychloride precursor solution was magnetically stirred for 30 minutes.

[0049] (3) Configuration of ethyl orthosilicate solution: Calculate the required amount of ethyl orthosilicate according to the molar ratio of zirconium oxychloride to ethyl orthosilicate 0.1:3, according to the volume ratio of 1:1-1:4 Measure a certain volume of tetraethyl orthosilicate and absolute ethanol, mix evenly, and stir magnetically for 30 minutes.

[0050] (4) Conf...

Embodiment 3

[0054] (1) Configuration of PS ball suspension: add 6mL styrene and 0.25mL α-methacrylic acid to 100mL deionized water, heat and stir in an oil bath to 75°C, stabilize for five minutes, add 0.14g potassium persulfate, continue Stir for 8h.

[0055] (2) Configuration of the zirconium oxychloride precursor solution: according to the mass ratio of 2:1, take a certain mass of citric acid and zirconium oxychloride respectively for use, and dissolve the citric acid and zirconium oxychloride in deionized water to obtain The zirconium oxychloride precursor solution was magnetically stirred for 30 minutes.

[0056] (3) Configuration of ethyl orthosilicate solution: Calculate the required amount of ethyl orthosilicate according to the molar ratio of zirconium oxychloride to ethyl orthosilicate 0.5:3, according to the volume ratio of 1:1-1:4 Measure a certain volume of tetraethyl orthosilicate and absolute ethanol, mix evenly, and stir magnetically for 30 minutes.

[0057] (4) Configur...

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Abstract

The invention discloses a preparation method of a zirconium oxide-based adsorbing photocatalyst and relates to a preparation method of a catalyst which has adsorption and photocatalytic performance atthe same time. The preparation method comprises the following steps: preparing a silicon-zirconium sol from raw materials of zirconium oxychloride, citric acid, polyethylene glycol, distilled water and polyethylene glycol in a certain proportion; adding a certain amount of PS spheres to prepare a compound sol; and drying and thermally treating the sol to obtain the zirconium oxide-silicon dioxide(SiO2-ZrO2) compound photocatalyst of a porous structure. After a dark reaction for 75 minutes, the adsorption rate of the catalyst to rhodamine B can reach 90%, and the degrading rate of rhodamine Bafter photoreaction for 165 minutes reaches over 95%. The problems that the visible photocatalyst is low in adsorption efficiency and poor in catalytic activity to dye pollutants and the existing preparation method is complex and high in preparation cost can be solved.

Description

technical field [0001] The invention belongs to the technical field of photocatalyst preparation, in particular to a method for preparing a zirconia-based adsorption photocatalyst and the photocatalyst. Background technique [0002] It is well known that environmental problems and energy crises are two major problems in today's society. In 1972, Fujishima and Honda first discovered that in single crystal TiO 2 The electrode can be photocatalyzed to split water to produce hydrogen. In 1976, Carey et al. also successfully made TiO 2 It is used for photocatalytic degradation of organic pollutants in water. After that, the application of photocatalysis has quickly attracted the attention of environmental and energy researchers in various countries. [0003] Traditional photocatalysts mainly refer to some oxide semiconductor photocatalysts, such as TiO 2 , ZnO 2 、TiO 2 , ZnO, WO 3 , CdS, etc. Except TiO 2 , ZnO, etc., ZrO 2 As a typical structural and functional material,...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J31/38C02F1/28C02F1/30B01J20/30
CPCB01J20/06B01J20/103C02F1/281C02F1/285C02F1/30B01J20/261B01J20/262B01J31/38C02F2101/308C02F2305/10B01J35/39
Inventor 刘长青张露月伍媛婷李旭宁青菊
Owner SHAANXI UNIV OF SCI & TECH
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