Preparation of Silica Nano-Particles by Sol-Gel Method and Its Characterization

Abstract

Nano silica (SiO2) has an extensive range of products from manufacturing to scientific. The Sol-gel technique in the field of material science is receiving worldwide interest because of its versatility for synthesizing silica nanoparticles. It provides a controlled composition of organic/inorganic hybrid material because of its unique and low-cost processing. The silica nanoparticles were prepared by the sol-gel method via two different routes first is a base-catalyzed hydrolysis reaction and the second is an acid-catalyzed hydrolysis reaction. The prepared silica nanoparticles were characterized by techniques Particle size analysis, Zeta potential, Fourier transform Infrared spectroscopy (FTIR), and X-Ray diffraction spectroscopy (XRD). Particle size analysis showed the nano range of particle and zeta potential proves the stability of prepared sols. Observed peaks from IR spectra are confirming the presence of a silica network. The amorphous silica was verified by the absence of sharp peaks and the presence of a broad peak at a 2θ angle of 23.8 for the XRD analysis structure in the produced NPs.

A Novel In Situ Sol-Gel Synthesis Method for PDMS Composites Reinforced with Silica Nanoparticles

“…The whitish hue in the alkaline catalysis is commonly observed in spherical SiO 2 particles with particle sizes of around 100–150 nm [ 26 ]. In contrast, the transparent solution in the acidic catalysis could represent the formation of particles with dendritic structures with particles between 50 and 60 nm [ 27 ].…”

“…To ascertain the physicochemical characteristics of the components that constituted the polymeric composites, the synthesis of SiO 2 nanoparticles was conducted by employing the Stöber method [ 26 , 27 ] and a previously developed methodology in our research group [ 28 , 29 ] for both acidic and alkaline media.…”

“…To initiate the hydrolysis process and the formation of SiO 2 nanoparticles, the corresponding alkaline or acid catalyst (NH 4 OH or HNO 3 ) was added dropwise until a pH of 10 (alkaline) or 2 (acidic) was achieved [ 27 ]. The solution was stirred for 2 h and then neutralized (pH 7).…”

Fabrication of an all-in-one self-enhanced solid-state electrochemiluminescence sensing platform for the selective detection of spermine

“…The short peak at 1633 cm −1 and the broad absorption band around ∼3418-3482 cm −1 are related to hydrogen bonds (i.e., isolated OH) and H-O-H stretching vibrations of the water molecule. 36,37 Fig. 1 FT-IR spectra of the synthesized SiO 2 and SiO 2 -PEI NPs.…”

Inorganic nanocarriers based on calcium carbonate and silica oxide for passive breast cancer targeting

“…Sol-gel method [11] is one of the best methods for the preparation of SiO2 NPs. In particular, this technique is extensively used because of easy methodology, soft conditions, and possibility for controlling the size of obtained NPs [12]. In fact, for biodistribution investigation and accumulation efficacy in tumor site, NPs parameters such as size and charge should be comparable.…”