Preparation method of mesoporous silica-coated cobalt manganese oxide and product and application thereof
A technology of mesoporous silica and cobalt-manganese coating, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, indirect carbon dioxide emission reduction, etc. Growth and other problems, to achieve the effect of promoting performance improvement, promoting dispersion, and excellent performance
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Embodiment 1
[0023] A mesoporous silica-coated cobalt-manganese oxide, "anchoring" bimetallic cobalt-manganese in the three-dimensional framework of MOF, and in situ synthesis of mesoporous silica, and finally through reduction and reoxidation to obtain mesoporous The silica-coated cobalt-manganese composite metal oxide is prepared according to the following steps:
[0024] (1) Preparation of CoMn-MOF: Weigh 0.58 g of cobalt nitrate hexahydrate (Co(NO 3 ) 2 ﹒ 6H 2 O), 0.06 g of 50% manganese nitrate aqueous solution and 0.01 g of cetyltrimethylammonium bromide (CTAB) were dissolved in 140 mL of deionized water; 9.0 g of 2-methylimidazole was weighed and dissolved in 140 mL of deionized water The two solutions were mixed and stirred at room temperature for 2 h and then left to age for 24 h; the precipitate was collected by centrifugation, washed with ethanol, and then placed in a blast drying oven to dry; the temperature was controlled at 80 °C to obtain CoMn-MOF;
[0025] (2) Disperse ...
Embodiment 2
[0032] A kind of mesoporous silica-coated cobalt manganese oxide, similar to the steps of Example 1, according to the following steps:
[0033] (1) Preparation of CoMn-MOF: Weigh 0.58 g of cobalt nitrate hexahydrate (Co(NO 3 ) 2 ﹒ 6H 2 O), 0.06 g of 50% manganese nitrate aqueous solution and 0.01 g of cetyltrimethylammonium bromide (CTAB) were dissolved in 140 mL of deionized water; 9.0 g of 2-methylimidazole was weighed and dissolved in 140 mL of deionized water ; The two solutions were mixed and stirred at room temperature for 2 h and then left to age for 24 h; the precipitate was collected by centrifugation, washed with ethanol, and then placed in a blast drying oven to dry. Control the temperature to 80 °C to obtain CoMn-MOF;
[0034] (2) Disperse 0.27 g CoMn-MOF in a mixed solution of 200 mL ethanol and 100 mL deionized water;
[0035] (3) Weigh 1.89 g of 2-methylimidazole and add it to the above dispersion liquid, and ultrasonicate for 0.5-1 h; further,
[0036] (4...
Embodiment 3
[0041] A kind of mesoporous silica-coated cobalt manganese oxide, similar to the steps of Example 1, according to the following steps:
[0042](1) Preparation of CoMn-MOF: Weigh 0.58 g of cobalt nitrate hexahydrate (Co(NO 3 ) 2 ﹒ 6H 2 O), 0.06 g of 50% manganese nitrate aqueous solution and 0.01 g of cetyltrimethylammonium bromide (CTAB) were dissolved in 140 mL of deionized water; 9.0 g of 2-methylimidazole was weighed and dissolved in 140 mL of deionized water The two solutions were mixed and stirred at room temperature for 2 h and then left to age for 24 h; the precipitate was collected by centrifugation, washed with ethanol, and then dried in a blast drying oven at a temperature of 80 °C to obtain CoMn-MOF.
[0043] (2) Disperse 0.43 g CoMn-MOF in a mixed solution of 200 mL ethanol and 333 mL deionized water;
[0044] (3) Weigh 2.56 g of 2-methylimidazole and add it to the above dispersion liquid, and ultrasonicate for 0.5-1 h; further,
[0045] (4) Weigh 1.36 g of CT...
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