Method for preparing large-specific-surface-area porous nickel oxide microspheres

Abstract

The invention discloses a method for preparing large-specific-surface-area porous nickel oxide microspheres. The method comprises the following steps of: preparing and synthesizing a mixed solution by taking nickel nitrate and urine as raw materials, taking hexadecyl trimethyl ammonium bromide as a surfactant, taking absolute ethanol and deionized water as washing agents and refining raw materials; heating in a reaction kettle for preparing hydrogen nickel carbonate; and washing, performing suction filtration, drying in vacuum, and baking to obtain large-specific-surface-area porous nickel oxide microspheres. The preparation method has the advantages of advanced process, short process flow, small using amount of raw materials, detailed and accurate data, high product yield which can be up to 95 percent and high product purity, which can be up to 98.5 percent; the specific surface area of the product, i.e., nickel oxide microspheres is 748.25m<2> / g, microsphere particles are less than or equal to 10 mum, irregular hexagonal nano-sheets are distributed on the surfaces of the microspheres and are less than or equal to 40 nanometers in diameter, and the microspheres can be matched with a plurality of chemical substances; and the method is very ideal method for preparing large-specific-surface-area porous nickel oxide microspheres.

Description

technical field [0001] The invention relates to a method for preparing porous nickel oxide microspheres with a large specific surface area, belonging to the technical field of preparation and application of inorganic compounds. Background technique [0002] With the development of nanoscience and technology, materials with special morphology and nanostructure have emerged and have been applied in the fields of optics, electronics, and catalysis; semiconductor oxide micro-nanostructure materials, due to their special structure and complex morphology, It is often used in optical and electronic devices; due to the uniform distribution of micropores and holes, the porous morphology has high porosity, low bulk density, high specific surface area and unique physical surface characteristics. Different porosity can change the physical properties of materials. And chemical properties, so the porous structure material with large specific surface area has excellent functions, and can b...

AI Technical Summary

Problems solved by technology

[0003] Nano-nickel oxide is an important functional material. Due to its unique electrical, magnetic and catalytic properties, it is widely used as electrodes, catalysts, magnetic materials and gas sensors for batteries. Because the unique properties of nano-nickel oxide depend on their Shape and size, so there are many ways to synthesize nano-nickel oxide with different morphological structures. For example, Yang et al. prepared carnation-shaped nano-nickel oxide by hydrolysis of nickel acetate in a mixed solvent of water and glycerol; Kuang et al. Under the action of anionic surfactant, nickel oxide microspheres with layered structure were prepared by hydrothermal method; Zhou et al. prepared concave polyhedral nickel oxide nanoparticles composed of nanosheets by hydrazine hydrate method; Banerjee et al. Sodium was used as a soft template and urea was used as a precipitant to prepare ordered porous NiO nanopolycrystals; Feng et al. used KIT-6 as a template to prepare bimodal distribution and ordered mesoporous nickel oxide materials; although these methods prepared different structures Nickel oxide material, but the specific surface area of ​​NiO is not large, its application has been greatly limited; there are also some process disadvantages, some process parameters are not accurate, the product purity is low, and some product structural features are not obvious, it is difficult to Matching with other chemical substances, some process methods are more complicated, the preparation cost is high, and it is difficult to carry out industrial production

Images