Synthesis of SiO₂Nanostructures Using Sol-Gel Method

Abstract

Sol-gel method is the simplest method and has the ability to control the particle size and morphology through systematic monitoring of reaction parameters. The objective of this research is to synthesize silica nanostructures by sol-gel method and to characterize the synthesized silica nanostructures. Silica nanoparticles were synthesized via the sol-gel method using Tetraethyl orthosilicate as a precursor. The acetic acid and distilled water were used as the catalyst and the hydrolyzing agent. Varied parameters of the study were the aging time in the range of 2 to 6 h and the calcination temperature in the range of 600-700• C. The obtained silica nanopowder was characterized using FESEM, and Nano-Particle Size Analyzer. The results show that the silica nanospheres were successfully synthesized by using sol-gel method with the optimum parameters of 700• C of calcination temperature and 2 h of aging time. The average size of silica nanoparticles was in the range of 79.68 nm to 87.35 nm.

Green synthesis of zinc oxide nanoparticles using Punica Granatum leaf extract and its application towards photocatalytic degradation of Coomassie brilliant blue R-250 dye

“…It has applications in solar cells, gas sensors, dye degradation and many more [3]. Zinc oxide nanoparticles have been synthesized using various chemical and physical methods including Sol-Gel [4], precipitation [5], arc discharge [6], hydrothermal [7], pulsed laser ablation [8]. Green synthesis method has been employed to synthesize zinc oxide nanoparticles due to many advantageous over physical and chemical methods as it does not involve hazardous chemicals and is eco-friendly and cost-effective [9,10].…”

The Synthesis of a Superhydrophobic and Thermal Stable Silica Coating via Sol-Gel Process

“…As expected, by comparing images for three cases, when the silica solution is deposited four times, a darker layer of particles is formed. It can be seen how the layer obtained for the case of the sol aged for 9 days, is more heterogeneous, showing zones with a higher concentration of silica particles because the degree of agglomeration of these particles increases with aging period [31][32][33].…”

Antibacterial Fibers Containing Nanosilica with Immobilized Silver Nanoparticles

“…The most recent literature indicates the availability of a wide range of nanosilica synthesis techniques [20]. Spherical silica nanoparticles as uniform particles from 5 nm to several microns can be synthesized [21], among others, by using the following methods: the sol-gel process [22,23], the hydrolysis of tetraethyl orthosilicate (TEOS) in an ethanol medium [24], wet chemical synthesis [25], flame spray pyrolysis [26], the low-temperature vapor-phase hydrolysis of SiCl4 [27], water-in-oil microemulsion [28], and microwave synthesis [29]. The choice of the synthesis method determines the basic parameters of the obtained silica nanoparticles (especially particle-size distribution and shape).…”