Preparation method and application of mesoporous manganese oxide material

A technology of mesoporous silicon oxide and manganese oxide is applied in chemical instruments and methods, manganese oxide/manganese hydroxide, oxidized water/sewage treatment, etc. Enhanced adsorption effect, structural integrity and high catalytic activity

Inactive Publication Date: 2014-05-21
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, the production and use of antibiotics has led to a sharp increase in the content of antibiotics in water, while the traditional treatment methods for degrading organic matter do not have a high degradation rate of antibiotics, making the degradation of antibiotics in water a major problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation of mesoporous manganese oxide materials:

[0021] Dissolve 0.2 g of SBA-15 powder in 5 mL of deionized water, and stir at room temperature for more than 5 h;

[0022] 0.5 g 50% Mn(NO 3 ) 2 The solution was added to the above solution, and the stirring was continued for 4 h;

[0023] Dry the solution at 100°C for 12 h until the water evaporates completely;

[0024] The white powder is calcined at 1 ℃·min -1 Heating rate, keep at 150°C, 200°C, 250°C, 300°C for 2 hours, and finally calcined at 350°C for 5 hours;

[0025] The obtained solid was put into 2 mol L -1 in NaOH solution, stirred at room temperature for 12 h;

[0026] Filter and wash the above mixed solution until the pH value of the filtered water is close to 7;

[0027] The solid was dried at 110 °C for 12 h.

Embodiment 2

[0029] Preparation of mesoporous manganese oxide materials:

[0030] Dissolve 0.2 g of KIT-6 powder in 5 mL of deionized water and stir at room temperature for more than 5 h;

[0031] 0.5 g 50% Mn(NO 3 ) 2 The solution was added to the above solution, and the stirring was continued for 4 h;

[0032] Dry the solution at 100°C for 12 h until the water evaporates completely;

[0033] The white powder is calcined at 1 ℃·min -1 Heating rate, keep at 150°C, 200°C, 250°C, 300°C for 2 hours, and finally calcined at 350°C for 5 hours;

[0034] The obtained solid was put into 1 mol L -1 in NaOH solution, stirred at room temperature for 12 h;

[0035] Filter and wash the above mixed solution until the pH value of the filtered water is close to 7;

[0036] The solid was dried at 100 °C for 12 h.

Embodiment 3

[0038] The mesoporous manganese oxide material obtained in Example 1 is used to catalyze hydrogen peroxide to degrade antibiotics in water, and the specific steps are as follows:

[0039] Put mesoporous manganese oxide powder into 25 mg·L -1 In the norfloxacin wastewater, the catalyst concentration was controlled at 1.0 g L -1 , and then stir vigorously so that the mesoporous manganese oxide can be evenly dispersed in the wastewater;

[0040] Add H to the above mixture 2 o 2 , control its concentration to 20 mM, and continue to stir;

[0041] After 0.5 h, the degradation rate of norfloxacin in water reached 60%, and after 1 h it reached 76%.

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Abstract

The invention relates to a preparation method and application of mesoporous manganese oxide material, which belong to the field of water treatment application. Specifically, mesoporous silicon oxide powder is dissolved into deionized water and stirred, so that uniform solution is formed, manganese source is then added into the solution and mixed uniformly, the solution is evaporated, and the obtained solid is calcined, and is finally washed with alkali, filtered, washed with water and dried. The invention adopts the mesoporous silicon oxide as template to synthesize the mesoporous manganese oxide material, the material has the characteristics of large specific surface area, regular porous structure and high catalytic activity, and moreover, when the material is adopted as catalyst, hydrogen peroxide is adopted as oxidant and rational process parameters are chosen, the effect of effectively degrading antibiotics in water can be achieved.

Description

technical field [0001] The invention provides a kind of mesoporous manganese oxide material as catalyst, hydrogen peroxide (H 2 o 2 ) is an oxidizing agent, and a method for efficiently degrading antibiotics in water belongs to the field of water treatment applications, and specifically relates to a preparation method and application of a mesoporous manganese oxide material. Background technique [0002] Fenton-like reagents are derived from H 2 o 2 The heterogeneous catalytic system composed of solid catalysts (mostly metal oxides) promotes H 2 o 2 Generate OH free radicals, and use the strong oxidation of OH free radicals to achieve the purpose of degradation. However, most of the materials used as catalysts do not have a porous structure, due to their small specific surface area (mostly less than 10 m 2 g -1 ), making its catalytic effect unsatisfactory, which greatly restricts the application of this technology. The study found that the mesoporous manganese oxide...

Claims

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Application Information

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IPC IPC(8): C01G45/02B01J23/34C02F1/58C02F1/72
Inventor 隋铭皓佘磊盛力魏金杰
Owner TONGJI UNIV
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