Method for improving catalysis efficiency of formaldehyde catalyst, and formaldehyde catalyst thereof
A catalytic efficiency and catalyst technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of high cost of containing precious metals, high cost of chemical reaction methods, and low cost Advanced problems, to achieve the effect of improving catalyst performance, expanding the scope of application, and good stability
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Embodiment 1
[0027] A kind of formaldehyde catalyst is prepared by following steps:
[0028] 1. High specific surface area nanowire-like Co 3 o 4 preparation of
[0029] Dissolve 1mol of cobalt nitrate and 2mol of urea in 80mL of ethanol aqueous solution with a volume ratio of 1:1. After completely dissolving, put the solution into a high-pressure reactor, put it in an oven, and react at 70°C for 12h. When the reaction is completed, cool it naturally After reaching room temperature, the powder was taken out and washed several times with distilled water and ethanol respectively, then dried, and finally calcined at 150 °C for 4 hours in a nitrogen atmosphere to obtain nanowire-like Co 3 o 4 .
[0030] 2. Sodium borohydride reduces Co 3 o 4
[0031] A certain amount of nanowire-like Co 3 o 4 and 0.5mol / L sodium borohydride solution into a beaker, stirred at room temperature for 3 hours, then the powder was taken out, washed with ethanol and water for several times, and finally drie...
Embodiment 2
[0033] A kind of formaldehyde catalyst is prepared by following steps:
[0034] 1. High specific surface area nanowire-like Co 3 o 4 Preparation
[0035] Dissolve 1mol of cobalt chloride and 3mol of urea in 80ml of ethanol aqueous solution with a volume ratio of 1:1. After completely dissolving, put the solution into an autoclave, put it in an oven, and react at 90°C for 8 hours. After cooling to room temperature, the powder was taken out and washed several times with distilled water and ethanol respectively, then dried, and finally calcined at 250 °C for 2 hours in a helium atmosphere to obtain nanowire-like Co 3 o 4 .
[0036] 2. Sodium borohydride reduces Co 3 o 4
[0037] A certain amount of nanowire-like Co 3 o 4 and 1mol / L sodium borohydride solution into a beaker, stirred at room temperature for 1 hour, then the powder was taken out, washed with ethanol and water for several times, and finally dried under vacuum for 12 hours to obtain the formaldehyde catalys...
Embodiment 3
[0039] A kind of formaldehyde catalyst is prepared by following steps:
[0040] 1. High specific surface area nanowire-like Co 3 o 4 preparation
[0041] Dissolve 1mol of cobalt acetate and 4mol of hexamethylenetetramine in 80ml of ethanol aqueous solution with a volume ratio of 1:1. After completely dissolving, put the solution into a high-pressure reactor, put it in an oven, and react at 110°C for 7 hours. After the reaction was completed and naturally cooled to room temperature, the powder was taken out and rinsed with distilled water and ethanol for several times, then dried, and finally calcined at 350 °C for 1.5 hours in a nitrogen atmosphere to obtain nanowire-like Co 3 o 4 .
[0042] 2. Sodium borohydride reduces Co 3 o 4
[0043] A certain amount of nanowire-like Co 3 o 4 and 1mol / L sodium borohydride solution into a beaker, stirred at room temperature for 1 hour, then the powder was taken out, washed with ethanol and water for several times, and finally dr...
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