A kind of preparation method of aldehyde removal catalyst
A technology of catalyst and complexing agent, which is applied in the field of preparation of aldehyde-removing catalysts, can solve the problems of reduced effective utilization of precious metals, no improvement in the dispersion of metal oxides, no strong interaction, etc., and achieves hydrogen-saving high-temperature reduction activation process , promote adsorption and further oxidation, and enhance the effect of electron transfer rate
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Embodiment 1
[0026] The preparation method of the aldehyde removal catalyst of the present embodiment comprises the steps:
[0027] (1) ultrasonically disperse 10 mg of graphene oxide in 30 mL of deionized water, then slowly dropwise add aqueous sodium carbonate solution therein, adjust the pH value of the solution to 9-10, and record it as solution A;
[0028] (2) Disperse 1.45g of nickel nitrate hexahydrate and 0.74g of sodium citrate in 30mL of deionized water, stir for a period of time, then add 0.005g of chloroplatinic acid solution, continue stirring evenly, and record it as solution B;
[0029] (3) Slowly add solution B to solution A, stir evenly to form solution C;
[0030] (4) Transfer solution C into a 100mL hydrothermal kettle and keep it warm at 120°C for 12h;
[0031] (5) The heated solution C obtained in step (4) is subjected to solid-liquid separation through a filter screen, and the separated solid matter is freeze-dried for 24 hours;
[0032] (6) Calcining the dried soli...
Embodiment 2
[0034] The difference between embodiment 2 and embodiment 1 is that step (6) is different:
[0035] In this example, the dried solid matter obtained in step (5) was calcined at 500° C. for 2 hours in a nitrogen atmosphere, and the heating rate was set at 3° C. / min and finally raised to 500° C. to obtain the catalyst.
Embodiment 3
[0037] The difference between embodiment 3 and embodiment 1 is that step (6) is different:
[0038] In this example, the dried solid matter obtained in step (5) was calcined at 200° C. for 2 h in a nitrogen atmosphere, and the heating rate was set at 3° C. / min and finally raised to 200° C. to obtain the catalyst. That is, the nitrogen roasting temperature is 200 degrees. At this time, platinum mostly exists in the form of salt or oxide, and platinum simple substance plays a major role in catalytic activity in formaldehyde oxidation.
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