Hollow magnetic nano-grade composite catalytic material and preparation method thereof
A technology of magnetic nano and catalytic materials, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the types of magnetic nanocomposite catalytic materials, preparation methods and catalytic performance The research is sparse and other problems, to achieve the effect of mild synthesis conditions and simple process
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Embodiment 1
[0030] 1) Add reactants
[0031] 2.5mmol Co(NO 3 ) 2 ·6H 2 O and 0.08g Fe 3 o 4 The nanoclusters were added to 35ml of ethanol, and NaOH was added to adjust the pH of the solution to 7, and stirred at room temperature until a uniform suspension was formed.
[0032] 2) One-step solvent heat treatment
[0033] The suspension obtained in 1) was transferred to a 50ml automatic pressure-relieving stainless steel high-pressure digestion tank with a polytetrafluoroethylene liner (Binhai County Zhenghong Plastic Factory, model: 50ml), and after 72h of solvent heat treatment at 200°C, , naturally cooled to room temperature.
[0034] 3) Post-processing
[0035] Magnetically separate the black solid obtained in 2) from the solution system under the action of an external magnetic field, and wash it with a mixed solvent of ethanol and water, and go through a magnetic separation-cleaning cycle for 3-5 times, and finally place the cleaned black magnetic solid in Drying under vacuum c...
Embodiment 2
[0040] Repeat embodiment 1, its difference is only to use MnFe 2 o 4 instead of Fe 3 o 4 , to obtain a hollow composite magnetic nanocatalytic material: Co 3 o 4 / MnFe 2 o 4 .
Embodiment 3
[0042] Repeat embodiment 1, its difference is only to use 2.5mmol Zn (NO 3 ) 2 ·6H 2 O instead of 2.5mmol Co(NO 3 ) 2 ·6H 2 O, use NiFe 2 o 4 instead of Fe 3 o 4 , the heat treatment time is 120h, and the hollow composite magnetic nano-catalytic material is obtained: ZnO / NiFe 2 o 4 .
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