Preparation method and application of vanadium-doped umbrella-shaped manganese-cerium composite oxide catalyst
A technology of composite oxides and catalysts, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems that have not yet been reported on umbrella-shaped manganese-cerium composite oxides, etc. problems, to achieve the effect of promoting activation and adsorption, high catalytic activity, and low raw material cost
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Embodiment 1
[0031] Preparation of 1V / 0.25MnCe Vanadium-doped Umbrella Manganese-Cerium Composite Oxide Catalyst
[0032] First, 4mmol Ce(NO 3 ) 3 ·6H 2 O and 1 mmol MnCl 2 4H 2 O was dissolved in 50ml deionized water and 25ml ethanol mixed solvent, after stirring to form a clear solution, then 90mmol NH 4 HCO 3 Add it to the above solution, continue to stir for 20 minutes, transfer it to a polytetrafluoroethylene hydrothermal kettle, and heat it at 100°C for 12 hours; centrifuge the sample after hydroheating, wash with water and ethanol three times, and dry at 80°C for 24 hours , and then calcined in a muffle furnace at 550°C in an air atmosphere for 4h, to obtain a manganese-cerium composite oxide.
[0033] Weigh 2g of manganese-cerium composite oxide and add it to 2.221mL, 0.1mol / L ammonium metavanadate solution and 1.8008g oxalic acid mixed solution, stir at room temperature for 2 hours, transfer to an oven, and dry at 100°C for 24 Hour. The obtained sample was placed in an air...
Embodiment 2
[0037] Preparation of 4V / 0.25MnCe Vanadium-doped Umbrella-shaped Manganese-Cerium Composite Oxide Catalyst
[0038] First, 4mmol Ce(NO 3 ) 3 ·6H 2 O and 1 mmol MnCl 2 4H 2 O was dissolved in 55ml deionized water and 20ml ethanol mixed solvent, after stirring to form a clear solution, then 90mmol NH 4 HCO 3 Add it to the above solution, continue to stir for 30 minutes, transfer it to a polytetrafluoroethylene hydrothermal kettle, and heat it at 120°C for 24 hours; centrifuge the sample after hydroheating, wash with water and ethanol three times, and dry at 60°C for 36 hours , and then calcined in a muffle furnace at 550°C in an air atmosphere for 2h, to obtain a manganese-cerium composite oxide.
[0039] Weigh 2g of manganese-cerium composite oxide and add it to 4.442mL, 0.2mol / L ammonium metavanadate solution and 1.8008g oxalic acid mixed solution, stir at room temperature for 2 hours, transfer to an oven, and dry at 100°C for 24 hours . The obtained sample was placed ...
Embodiment 3
[0041] Preparation of 1V / 0.5MnCe Vanadium-doped Umbrella Manganese-Cerium Composite Oxide Catalyst
[0042] First, 4mmol Ce(NO 3 ) 3 ·6H 2 O and 2 mmol MnCl 2 4H 2 O was dissolved in 60ml deionized water and 15ml ethanol mixed solvent, after stirring to form a clear solution, then 90mmol NH 4 HCO 3 Add it to the above solution, continue to stir for 40 minutes, transfer it to a polytetrafluoroethylene hydrothermal kettle, and heat it at 140°C for 48 hours; centrifuge the sample after hydroheating, wash with water and ethanol three times, and dry at 100°C for 48 hours , and then calcined in a muffle furnace at 650°C in an air atmosphere for 6h, to obtain a manganese-cerium composite oxide.
[0043]Weigh 2g of manganese-cerium composite oxide and add it to a mixed solution of 2.221mL, 0.1mol / L ammonium metavanadate solution and 1.8008g oxalic acid, stir at room temperature for 3 hours, transfer to an oven, and dry at 120°C for 36 Hour. The obtained sample was placed in an...
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