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TiO2/MnSO4 composite photocatalyst, and preparation and use thereof

A technology of catalyst and composite light, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve the problem of unsatisfactory treatment effect and achieve good stability and high photocatalytic activity. Effect

Inactive Publication Date: 2004-09-15
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A variety of decolorization technologies have been tried at home and abroad, such as chemical coagulation, ion exchange, ozone oxidation, H 2 o 2 -Fenton's reagent method, biochemical method and adsorption method are used to treat it, but the treatment effect is unsatisfactory, and there is an urgent need to research and develop new treatment technologies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The first step of raw material preparation

[0026] Weigh 100g of anatase TiO 2 Powder, as carrier, standby;

[0027] The second step MnSO 4 solution impregnation

[0028] Add the raw materials of the previous step to 500g of 0.06mol / L MnSO 4 Solution, dipping treatment for 12h;

[0029] The third step is drying and roasting to obtain the finished product

[0030] Drying at 100°C for 8h, the dried anatase TiO 2 The powder was roasted at 300°C for 5 hours to obtain 104g of finished product, TiO 2 / MnSO 4 composite photocatalyst.

[0031] The application of the product of embodiment 1: in Erlenmeyer flask, 0.4g TiO 2 / MnSO 4 Catalyst and 2g 0.040mol / L KMnO 4 Mix the solution, add 1mol / L nitric acid to adjust the pH value of the solution until pH≤2, shake well, let it stand for 10min, then directly add 100g of 100mg / l methyl orange solution for adsorption and decolorization. The content of methyl orange in the solution was 0.70 mg after adsorption for 15 minute...

Embodiment 2

[0033] The first step of raw material preparation

[0034] Weigh 100g of anatase TiO 2 Powder, as carrier, standby;

[0035] The second step MnSO 4 solution impregnation

[0036] Add the raw materials of the previous step to 500g of 0.06mol / L MnSO 4 Solution, dipping treatment for 18h;

[0037] The third step is drying and roasting to obtain the finished product

[0038] Drying at 100°C for 9h, the dried anatase TiO 2 The powder was roasted at 350°C for 4 hours to obtain 104g of finished product, TiO 2 / MnSO 4 composite photocatalyst.

[0039] The application of the product of embodiment 2: in Erlenmeyer flask, 0.5g TiO 2 / MnSO 4 Catalyst with 2.5g of 0.04mol / LKMnO 4Mix the solution, add 1mol / L nitric acid to adjust the pH value of the solution until pH≤2, shake well, let it stand for 10min, then directly add 100g of 100mg / l methyl orange solution for adsorption and decolorization. The content of methyl orange in the solution was 0.7 mg after adsorption for 15 minu...

Embodiment 3

[0041] The first step of raw material preparation

[0042] Weigh 100g of anatase TiO 2 Powder, as carrier, standby;

[0043] The second step MnSO 4 solution impregnation

[0044] Add the raw materials of the previous step to 500g of 0.06mol / L MnSO 4 Solution, dipping treatment for 24h;

[0045] The third step is drying and roasting to obtain the finished product

[0046] Drying at 100°C for 10 h, the dried anatase TiO 2 Powder placed. Calcined at 400°C for 3h to obtain 104g of finished product, TiO 2 / MnSO 4 composite photocatalyst.

[0047] The application of the product of embodiment 3: in Erlenmeyer flask, 0.4g TiO 2 / MnSO 4 Catalyst and 2g 0.040mol / L KMnO 4 Mix the solution, add 1mol / L nitric acid to adjust the pH value of the solution until pH≤2, shake well, let it stand for 10min, then directly add 100g of 100mg / l methyl orange solution for adsorption and decolorization. After 30 minutes of adsorption, the content of methyl orange in the solution was 1.14 mg...

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Abstract

The invention is a TiO2 / MnSO4 photo-compound catalyst as well as its preparation and application, composed of TiO2 and MnSO4 mixed with each other, MnSO4 is absorbed on the surface of TiO2 particles, and the weight ratio of TiO2 to MnSO4 is 96 : 4. Its preparation: using the anatase TiO2 powder body as carrier, dipping by MnSO4 solution, drying, and baking to make it. It can be applied to absorb higher concentration organic dye (like methyl orange, butyl rhodamine B, alizarin red, etc.) waster water and photocatalysis degradation treatment.

Description

technical field [0001] The present invention relates to a kind of TiO 2 / MnSO 4 The composite photocatalyst and its preparation and application belong to the technical field of inorganic catalyst and its preparation and application. Background technique [0002] Photocatalytic technology uses ultraviolet light to irradiate photocatalytically active semiconductor materials to generate photogenerated holes and form hydroxyl radicals after being captured. It has a strong oxidizing ability and can oxidize and mineralize almost all organic pollutants. . In recent years, with people's attention to trace organic pollutants that are difficult to degrade in the environment, photocatalytic oxidation technology has attracted much attention because of its ability to directly use sunlight. TiO 2 Not only the chemical and photochemical properties are very stable, non-toxic and cheap, but also its anatase form has high photocatalytic activity, and it is a photocata...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J27/053B01J37/02
Inventor 刘志强单永奎何鸣元
Owner EAST CHINA NORMAL UNIV
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