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
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[0019] Example 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] Put 0.5 g of 50% Mn (NO 3 ) 2 The solution was added to the above solution, and the stirring was continued for 4 h;
[0023] The solution was dried at 100 °C for 12 h until the water evaporated completely;
[0024] The white powder was calcined at 1 ℃·min -1 The heating rate was maintained at 150 °C, 200 °C, 250 °C, and 300 °C for 2 h, and finally calcined at 350 °C for 5 h;
[0025] Put the obtained solid into 2 mol L -1 NaOH solution, stirred at room temperature for 12 h;
[0026] The above mixed solution is filtered and washed until the pH value of the filtered water is close to 7;
[0027] The solid was placed at 110 °C and dried for 12 h.
Example Embodiment
[0028] Example 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] Put 0.5 g of 50% Mn (NO 3 ) 2 The solution was added to the above solution, and the stirring was continued for 4 h;
[0032] The solution was dried at 100 °C for 12 h until the water evaporated completely;
[0033] The white powder was calcined at 1 ℃·min -1 The heating rate was maintained at 150 °C, 200 °C, 250 °C, and 300 °C for 2 h, and finally calcined at 350 °C for 5 h;
[0034] Put the obtained solid into 1 mol L -1 NaOH solution, stirred at room temperature for 12 h;
[0035] The above mixed solution is filtered and washed until the pH value of the filtered water is close to 7;
[0036] The solid was dried at 100 °C for 12 h.
Example Embodiment
[0037] Example 3:
[0038] The mesoporous manganese oxide material obtained in Example 1 is catalyzed by hydrogen peroxide to degrade antibiotics in water, and the specific steps are as follows:
[0039] Put the mesoporous manganese oxide powder into 25 mg·L -1 In the norfloxacin wastewater, the catalyst concentration was controlled to 1.0 g L -1 , and then vigorously stirred, so that the mesoporous manganese oxide can be uniformly 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] The degradation rate of norfloxacin in water reached 60% after 0.5 h and 76% after 1 h.
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