A kind of cobalt-manganese composite oxide supported catalyst for removing formaldehyde at room temperature and preparation method thereof
A technology of supported catalysts and composite oxides, applied in the field of cobalt-manganese composite oxide supported catalysts and their preparation, to achieve the effects of low production cost, good stability and strong interaction
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[0027]The preparation method of the cobalt manganese composite oxide loaded catalyst for room temperature de-formaldehyde, including the following steps:
[0028]1) Expensive metal salt, cobalt salt, manganese salt, and 2,5-dihydroxy terephthalic acid are dissolved, sufficiently reacted, filtered to give precipitate, dried to obtain a MOFS loaded by noble metal particles;
[0029]2) Pyrolysis of the MOFS loaded by the noble metal particles to obtain a powdery catalyst;
[0030]3) Place the powdered catalyst in a reducing atmosphere to be reduced to obtain a cobalt-manganese composite oxide precious metal catalyst, i.e., a cobalt-manganese composite oxide load type catalyst for room temperature in addition to formaldehyde.
[0031]Preferably, the noble metal salt described in step 1) is a platinum salt, a palladium salt, and a hydrazine salt.
[0032]Preferably, the cobalt salt described in step 1) is at least one of cobalt sulfate, cobalt nitrate, cobalt chloride, cobalt acetate.
[0033]Preferred, t...
Embodiment 1
[0042]A method for preparing a cobalt-manganese composite oxide loaded catalyst for room temperature in addition to formaldehyde, comprising the steps of:
[0043]1) Dissolute the tetramonia nitrate, cobalt nitrate, manganese nitrate, and 2,5-dihydroxy terephthalic acid to dissolve with ethanol / N, N-dimethylformamide mixed solvent, Pt4+(Co2++ MN2+), 2,5-dihydroxy phthalic acid, (C2Hide5The molar ratio of OH + DMF was 0.001: 1: 0.4: 600, 130 ° C for 24 h, and filtered to give a gray purple precipitate, 120 ° C for vacuum drying for 12 h, to obtain a metal organic skeleton material for load PT Pt / MnCO-MOF;
[0044]2) PT / MnCO-MOF is placed in an empty atmosphere, 500 ° C constant temperature hot solution 0.5 h, resulting in a powdery catalyst;
[0045]3) Place the powdered catalyst mixed gas (hydrogen, nitrogen volume ratio 1: 9), at 200 ° C for 1 h at 200 ° C, resulting in Pt / MnCoOχ (Black powder), that is, cobalt-manganese composite oxide loaded catalyst for room temperature, formalde...
Embodiment 2
[0047]A method for preparing a cobalt-manganese composite oxide loaded catalyst for room temperature in addition to formaldehyde, comprising the steps of:
[0048]1) Palladium nitrate, cobalt chloride, chloride, and 2,5-dihydroxy phthalic acid is dissolved with isopropanol / N, N-dimethylformamide mixed solvent, Pd2+(Co2++ MN2+2,5-dihydroxy terephthalic acid, (isopropyl alcohol + DMF) molar ratio of 0.005: 1: 0.5: 700, 135 ° C for 24 h, filtered to give gray purple precipitate, 120 ° C is vacuum drying 12h, resulting Metal organic skeleton material PD / MnCo-Mof in load PD;
[0049]2) PD / MnCO-MOF is placed in an empty atmosphere, and the thermostatic heat dissipation of 1 h is 400 ° C to obtain a powdery catalyst;
[0050]3) Place the powdered catalyst in mixed gas (hydrogen, nitrogen volume ratio 1: 9), 2 h at 200 ° C, resulting in PD / MnCoOχ (Black powder), ie catalyzic catalyst used for room temperature deformate (the mass content of each component is 0.67% palladium, 25.1% cobalt, 46....
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