Process for preparing metal oxide nano powder

Abstract

A process for preparing the nano-particles of metallic oxide includes such steps as dissolving metallic salt in water to obtain aqueous solution of sol, mixing it with ammonia water to become gel of metallic hydroxide, ageing, filtering, water washing to obtain wet gel, mixing it with alcohol, alcoholizing reaction, filtering, baking and calcining. It has high catalytic performance and catalyst carrier effect.

Description

technical field [0001] The invention relates to a method for preparing titanium oxide, zirconium oxide and titanium-zirconium-based composite oxide nanopowder, which belongs to the technical field of chemical catalyst preparation. Background technique [0002] Generally speaking, the smaller the particle size of a solid particle, the larger its specific surface area will be. As a catalyst, the larger the specific surface area, the more catalytic active centers provided per unit surface, and the higher the catalytic activity, which is beneficial to the conversion of reactants. Metal oxides are commonly used catalysts or catalyst supports. The commonly used methods for preparing metal oxides include dispersion method, solvent evaporation method, precipitation method and so on. The process of preparing metal oxides by precipitation method is simple, the performance of the obtained nano-powder is good, and it is easy to add other trace elements. The particles are larger. In ...

AI Technical Summary

Problems solved by technology

However, the metal alkoxide method needs to use a large amount of expensive organometallic compounds, and the organic substances used as solvents are often some toxic substances; so this method is expensive and easily causes pollution problems