A kind of mesoporous metal oxide catalyst for CO oxidation reaction and its preparation
A technology of oxides and catalysts, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, carbon compounds, etc. The problem of large amount of solution and template agent can achieve the effect of high catalytic activity and selectivity, simple preparation method and mild reaction conditions.
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Embodiment 1
[0029] Phosphotungstic acid H 3 PW 12 o 40 and cobalt nitrate in a mass ratio of 1:1 into a ball mill tank, milled on a three-dimensional vibrating ball mill for 1 hour, took out the solid mixture, and calcined it in a muffle furnace at 350°C for 1 hour with a heating rate of 5°C / min. The black solid was washed three times with deionized water, washed twice with 1M KOH aqueous solution, and then washed with deionized water until the black solid was neutral, and dried in an oven at 80 °C for 12 h to obtain mesoporous Co 3 o 4 .
[0030] p to mesoporous Co 3 o 4 N at liquid nitrogen temperature 2 Adsorption and desorption characterization test, figure 1 Mesoporous Co 3 o 4 N 2 Adsorption-desorption curve diagram. from figure 1 It can be seen that a clear hysteresis loop appears between the adsorption / desorption curves, indicating that the material is a mesoporous structure with a measured surface area of 135 m 2 / g.
[0031] p to mesoporous Co 3 o 4 Take a tran...
Embodiment 2
[0033] Phosphomolybdic acid H 3 PMo 12 o 40 Add copper nitrate and copper nitrate into the ball mill tank according to the mass ratio of 1:1, mill it on a three-dimensional vibrating ball mill for 1 hour, take out the solid mixture, and calcinate it in a muffle furnace at 350°C for 1 hour, with a heating rate of 5°C / min, and the calcined The black solid was washed three times with deionized water, washed twice with 1M KOH aqueous solution, and then washed with deionized water until neutral, and dried in an oven at 80° C. for 12 h to obtain mesoporous CuO.
[0034] XRD test on mesoporous CuO, image 3 shows the XRD pattern of mesoporous CuO, from image 3 It can be seen that there are obvious diffraction peaks of CuO at 2-Theta of 37°, 39°, 48°, 63°, and 68°, indicating that mesoporous CuO has a good lattice structure.
Embodiment 3
[0036] Phosphotungstic acid H 3 PW 12 o 40 , cobalt nitrate, and copper nitrate were added to the ball mill tank according to the mass ratio of 1:0.5:0.5, and ball milled on a three-dimensional vibrating ball mill for 1 hour, and the solid mixture was taken out, and calcined in a muffle furnace at 350°C for 1 hour, and the heating rate was 5°C / min, the black solid obtained by calcination was washed three times with deionized water, washed twice with 1M KOH aqueous solution, and then washed with deionized water until the black solid was neutral, and dried in an oven at 80°C for 12 hours to obtain a mesoporous cobalt-copper composite oxide thing.
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