Method for preparing bio-based spherical nano silicon dioxide

The invention provides a method for preparing bio-based spherical nano silicon dioxide, and belongs to the technical field of high-quality utilization of biomass. Carbonized rice husks are used as a silicon source, a switch surfactant DDA (the switch surfactant DDA reacts with CO2 to generate ammoni...

Full description

Saved in:
Bibliographic Details
Main Authors ZHANG LONG, TANG BAOYU
Format Patent
LanguageChinese
English
Published 30.11.2021
Subjects
BASIC ELECTRIC ELEMENTS
CHEMISTRY
COMPOUNDS THEREOF
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
INORGANIC CHEMISTRY
MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES
METALLURGY
NANOTECHNOLOGY
NON-METALLIC ELEMENTS
PERFORMING OPERATIONS
SEMICONDUCTOR DEVICES
SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES
TRANSPORTING
Online AccessGet full text

Cover

More Information
Summary:The invention provides a method for preparing bio-based spherical nano silicon dioxide, and belongs to the technical field of high-quality utilization of biomass. Carbonized rice husks are used as a silicon source, a switch surfactant DDA (the switch surfactant DDA reacts with CO2 to generate ammonium bicarbonate, the ammonium bicarbonate is protonized into a surface active form, and the bicarbonate can be converted into non-surface-activity under heating and ultrasonic conditions) and an environment-friendly precipitator are adopted, and the bio-based spherical nano silicon dioxide is prepared through an improved chemical precipitation method. Under proper reaction conditions, the yield of silicon dioxide is as high as 99.3%. The maximum specific surface area of the obtained silicon dioxide reaches 462 m /g, the sphericity rate exceeds 95.0%, the particle size is 50-200 nm, the industrial waste gas containing carbon dioxide is used as the raw material in the method, a surfactant and byproducts used in the pr
Bibliography:Application Number: CN202111118559