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ZrO2/TiO2 composite photocatalyst and its preparation method and use

A catalyst and composite light technology, which is applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve the effects of low comprehensive cost, good industrial application prospects, and large specific surface area.

Inactive Publication Date: 2017-02-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It solves the problem of photocatalytic recycling and provides the possibility of putting it into practical application

Method used

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  • ZrO2/TiO2 composite photocatalyst and its preparation method and use
  • ZrO2/TiO2 composite photocatalyst and its preparation method and use
  • ZrO2/TiO2 composite photocatalyst and its preparation method and use

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Experimental program
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Effect test

Embodiment 1

[0032] 1. Polish the Ti-6Al-4V titanium alloy through 400-mesh, 1000-mesh, and 2000-mesh sandpaper in sequence, wash with distilled water, and then blow dry.

[0033] 2. The stainless steel plate is used as the cathode, and the titanium alloy is used as the anode. The electrode distance is 30 mm. Cooling water was fed into the reactor to control the temperature of the reaction system at 30°C, and the stirring system was used to stir the electrolyte concentration and temperature to achieve a uniform distribution. The electrolyte composition is 4.0 g / L KOH (purchased from Guangzhou Donghong Chemical Factory) and 10 g / L Na 3 PO 4(purchased from Tianjin Hedong Hongyan Reagent Factory), and add 8g / L nanometer zirconia powder (Aladdin reagent), and the rest is deionized water. The plasma electrolytic oxidation voltage was 370 V for 30 min.

[0034] 3. The area of ​​the film layer obtained in step 2 is 3cm 2 The workpiece was soaked in 2mol / L sulfuric acid solution for 24h, wash...

Embodiment 2

[0037] 1. Polish the Ti-6Al-4V titanium alloy through 400-mesh, 1000-mesh, and 2000-mesh sandpaper in sequence, wash with distilled water, and then blow dry.

[0038] 2. The stainless steel plate is used as the cathode, and the titanium alloy is used as the anode. The electrode distance is 30 mm. Cooling water was fed into the reactor to control the temperature of the reaction system at 30°C, and the stirring system was used to stir the electrolyte concentration and temperature to achieve a uniform distribution. The electrolyte composition is 4.0 g / L KOH and 10 g / L Na 3 PO 4 , and add 8g / L nano zirconium dioxide powder, and the rest is deionized water. The plasma electrolytic oxidation voltage was 370 V for 30 min.

[0039] 3. Make the film layer area obtained in step 2 3cm 2 The workpiece was soaked in 2mol / L sulfuric acid solution for 24h, washed with water, dried naturally and then calcined for 5h at a calcination temperature of 550°C to obtain ZrO 2 / TiO 2 composite...

Embodiment 3

[0042] 1. Polish the Ti-6Al-4V titanium alloy through 400-mesh, 1000-mesh, and 2000-mesh sandpaper in sequence, wash with distilled water, and then blow dry.

[0043] 2. The stainless steel plate is used as the cathode, and the titanium alloy is used as the anode. The electrode distance is 30 mm. Cooling water was fed into the reactor to control the temperature of the reaction system at 30°C, and the stirring system was used to stir the electrolyte concentration and temperature to achieve a uniform distribution. The electrolyte composition is 4.0 g / L KOH and 10 g / L Na 3 PO 4 , and add 8g / L nano zirconium dioxide powder, and the rest is deionized water. The plasma electrolytic oxidation voltage was 370 V for 30 min.

[0044] 3. The area of ​​the film layer obtained in step 2 is 3cm 2 The workpiece was soaked in 2mol / L sulfuric acid solution for 24h, washed with water, dried naturally and then calcined for 5h at a calcination temperature of 650°C to obtain ZrO 2 / TiO 2 co...

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Abstract

The invention discloses a ZrO2 / TiO2 composite photocatalyst and its preparation method and use. The preparation method comprises 1, carrying out plasma electrolytic oxidation treatment on a titanium alloy workpiece subjected to sand paper polishing and cleaning in a nanometer zirconia powder-containing alkaline electrolyte, and 2, cleaning the treated workpiece, immersing the treated workpiece in a sulfuric acid solution and carrying out high temperature calcining through a muffle furnace to obtain the ZrO2 / TiO2 composite photocatalyst. The ZrO2 / TiO2 composite photocatalyst and a methylene blue solution are added into a photocatalytic reactor and the photocatalyst catalyzes methylene blue degradation. The ZrO2 / TiO2 composite film is used as a photocatalyst, has a large film specific surface area and improves photocatalysis effects. Through re-calcining, the ZrO2 / TiO2 composite photocatalyst realizes recycle of the inactivated catalyst. The preparation method realizes a low comprehensive cost, is free of environmental pollution and has a good industrial application prospect.

Description

technical field [0001] The invention relates to the field of preparation of photocatalysts, in particular to a ZrO 2 / TiO 2 Composite photocatalyst and its preparation method and application. Background technique [0002] At present, most of the catalysts used for photocatalytic degradation of environmental pollutants are semiconductor materials, such as TiO 2 、WO 3 , SnO 2 , Fe 2 o 3 etc., in which nano-TiO 2 Photocatalytic technology has the advantages of stable chemical properties, high catalytic activity, low cost, and no secondary pollution, making it widely used in the catalytic treatment of environmental pollutants. TiO 2 There are many methods for preparing photocatalytic materials, which are generally divided into three types: solid-phase method, gas-phase method and liquid-phase method according to the state of matter. The size of the nanoparticles prepared by the solid-state method is relatively large, so the preparation of highly catalytically active nan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06C02F1/30
CPCC02F1/30B01J21/066B01J37/08B01J37/349C02F2101/308C02F2305/10B01J35/39
Inventor 严宗诚吴明月陈砺
Owner SOUTH CHINA UNIV OF TECH
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