Preparation of Nanometer Silica by Freeze-Drying Chemical Precipitation Method
Journal Title: To Chemistry Journal - Year 2018, Vol 1, Issue 1
Abstract
Nanometer SiO2 with different sizes and shapes is synthesized by coprecipitation technique using sodium silicane as Si source, ammonium chloride as precipitant, ethanol as dispersant, CTAB as regulator. Nanometer SiO2 is obtained from the titration precipitation method and reverse titration precipitation method, respectively．Morphology size distribution and structure of SiO2 particles is characterized by laser particle size analyzer ,microscope and FTIR.The results show that the optimum condition of synthesizing nanometer SiO2 were as follows, the concentration of sodium silicane was 0.4 mol/L, volume ratio of ethanol to water was1:8,pH value was 8.5, concentration of CTAB was 6mmol/l.Spherical silica particles ranging from 3 to 6nm are prepared by the method of reverse titration precipitation and freeze-drying.
Authors and Affiliations
Shanshan Jin, Xuehui Rui, Yingping Qi, Hua Li
Keywords
Related Articles
- EP ID EP485449
- DOI -
- Views 183
- Downloads 0
Study on properties of epoxy resin and polyurethane modified with organic silicon
In order to solve the problem of poor compatibility of traditional resins, improve its adhesion, toughness, corrosion, heat resistance, salt spray, and other properties of the coating, the epoxy resin and polyuretha...
Adsorption Studies of Crystal Violet From Aqueous Solution Using Low Cost Material: Equilibrium and Kinetics Studies
Crystal violet (CV), one of the toxic dyes which are extensively used for dyestuffs, textile, paper and plastics industries. CV does not easily biodegrades in aqueous medium and show harmful effect on aquatic as well as...
Oxidative Cleavage of Solbutamol by N- Chloro Saccharin in Aqueous Acetic Acid Medium
Kinetic oxidation of Salbutamol by N-Chlorosaccharin, in aqueous Acetic acid medium, shows first-order dependence on [NCSA] and [H+], and fractional order on [Solbutamol]. The variation of [H+] and [Sacharin](reaction pr...
Constituents and Pharmacological Effects of Leontice Leontopetalum- A Review
Phytochemical analysis showed that Leontice leontopetalum contained many quinolizidine alkaloids, tannins, phenolic, flavonoids and many other bioactive contents. The pharmacological studies revealed th...
Influence of Particle Size on the Anticonvulsant Activity of Propoxazepam
The granulometric composition of new analgesic substance (7-bromo-5-(o-chlorophenyl)-3-propoxy-1,2-dihydro-3H-1,4-benzodiazepin-2-one) was characterized by methods of crystals microscopy and lazer diffraction,. The singl...