Small-particle-size ultrahigh-specific-area nano silicon oxide

Abstract

The invention discloses a small-particle-size ultrahigh-specific-area nano silicon oxide which is prepared by the following steps: adding metered inorganic acid, water glass, a nucleator, a dispersing agent and pure water into a reaction vessel, and emulsifying and stirring by high-speed shearing to perform primary reaction; added metered primary reaction product, inorganic acid and a nucleator into a reaction vessel, stirring at low speed to perform secondary reaction; regulating the pH value of the reaction product after secondary reaction to less than 3, and carrying out aging reaction under such conditions to stably form the particles; and carrying out deacidifying-desalting washing on the product under strong acid conditions to obtain the small-particle-size ultrahigh-specific-area nano silicon oxide. The particle size of the nano silicon oxide can reach 5-10nm, and the specific area is up to 600-1160 m<2> / g. The nano silicon oxide has small particle size and ultrahigh specific area, and thus, has excellent effects when being applied to multiple fields.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and more specifically relates to a kind of nano silicon oxide. Background technique [0002] Nanomaterials refer to solid materials composed of extremely fine grains with characteristic dimensions on the order of nanometers (1-100nm). Because the scale of this kind of material is in the junction area between atomic clusters and macroscopic objects, it has surface effect, small size effect, quantum size effect and macroscopic quantum tunneling effect. It has special properties that traditional materials and devices do not have. [0003] Nano-silica (also called nano-silica) is a typical nano-material with a wide range of sources, low price, non-toxic, odorless, less environmental pollution, and excellent stability, thickening and thixotropy , so it has a wide range of applications. Nano silica has small particle size, large specific surface area, strong surface adsorption force, lar...

AI Technical Summary

Problems solved by technology

However, this method still has the defects that the particle size and specific surface area are uncontrollable, and its microstructure, dispersion and porosity cannot be effectively guaranteed, so that the prepared nano-silica still has large particle size and low specific surface area. problems, unable to meet the needs of various industry applications at this stage

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