Nanosheet layer material with overlapping structure, preparation method and application thereof
A nanosheet and sheet technology, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve problems such as single structure, difficult modification and regulation, and achieve high active surface area, Enhance physical and chemical activity, strong practical effect
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Embodiment 1
[0035] a, Preparation of graphene-based materials
[0036] Graphene-based materials all use graphite oxide prepared by the Hummer method as a precursor, and the prepared graphite oxide is dispersed in deionized water at a concentration of 1 mg per milliliter, and ultrasonically stirred for 4 hours; prepared by hydrothermal synthesis. Graphene oxide of Pt nanoparticle precursor: chloroplatinic acid is added to the ethylene glycol dispersion solution of graphene oxide according to the mass ratio of metal Pt to graphene as 10%, the total mass percentage concentration of metal precursor salt and graphene oxide 2%, adjust the pH value to about 11-14 with sodium hydroxide, react in an oil bath at 140 degrees Celsius for 2 hours, filter and wash after fully reducing; disperse the above intermediate product in deionized water at a concentration of 20 mg / ml, and use liquid Nitrogen is condensed to a solid state, and placed in a freeze dryer for 24 hours of freeze-drying process until t...
Embodiment 2
[0054] a, Preparation of graphene-based materials
[0055] Graphene-based materials all use graphite oxide prepared by the Hummer method as a precursor, and the prepared graphite oxide is dispersed in deionized water at a concentration of 1 mg per milliliter, and the ultrasonic stirring is continued for 4 hours; the doped material is prepared by chemical pyrolysis. Graphene oxide with nitrogen element: Mix melamine which accounts for 20% by mass of graphene oxide with the above-mentioned freeze-dried graphene oxide sample, and react in a tube furnace at 800 degrees Celsius for 3 hours under a nitrogen atmosphere; The product was dispersed in deionized water at a concentration of 10 mg / ml, condensed to a solid state with liquid nitrogen, and placed in a freeze dryer for 48 hours of freeze-drying until the solvent was completely removed; the above-mentioned dried samples were placed in a tube furnace The graphene-based material was obtained by chemical reduction in a hydrogen-ar...
Embodiment 3
[0059] a, Preparation of graphene-based materials
[0060] Graphene-based materials all use graphite oxide prepared by the Hummer method as a precursor, and the prepared graphite oxide is dispersed in deionized water at a concentration of 1 mg / ml, and ultrasonically stirred for 6 hours; prepared by hydrothermal synthesis. Graphene oxide of Pd nanoparticle precursor: Adding chloropalladium acid to the ethylene glycol dispersion solution of graphene oxide according to the mass ratio of metal Pd to graphene is 10%, the total mass percentage concentration of metal precursor salt and graphene oxide 2%, adjust the pH value to about 11-14 with sodium hydroxide, react in an oil bath at 140 degrees Celsius for 2 hours, filter and wash after fully reducing; disperse the above intermediate product in deionized water at a concentration of 20 mg / ml, and use liquid Nitrogen is condensed to a solid state, and placed in a freeze dryer for 24 hours of freeze-drying process until the solvent is...
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