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In order to understand the effect of ethanol concentration on the particle size of silicon dioxide. The ethanol concentration was between 4 and 10 M. Ethanol plays an important role in influencing the monodispersity and size of silica nanoparticles. In this study, the ethanol concentration range decreased from 8-4 M and the particle size decreased. It can be seen from Fig. 5 that the particle size increases with increasing ethanol concentration to 6 M, after which the ethanol concentration drops to 4 M under TEOS and ammonia concentrations of 0.045 M and 14 M. Monodisperse and uniform size of the particles in the ethanol, TEOS ammonia concentration of 4M, 0.045M and 14M, the bearing size is 20nm.

The effect of different concentrations of ethanol on the size of silicon dioxide particles was also investigated. Under the experimental conditions of TEOS and ammonia concentration of 0.045M and 14M, ethanol 8,6 and 4 M, the reaction was carried out. The temperature is between 30 and 70 °C to understand the effect on particle size and conduct various comparative studies. According to Tan et al., monodisperse particles of about 2 microns were obtained from the TEOS-water-ethanol solution as the temperature decreased. The concentration of saturated ammonia associated with the temperature effect decreases with increasing temperature. In this method, it is noted that the different types of trends in the size of the silica nanoparticles, as well as the availability of monodispersed and uniformly sized silica particles. It can be seen that the ethanol concentration was 6 and 4M under the experimental conditions of 0.045M TEOS and 14 M NH3, and the particle size increased with the increase of temperature. Under the conditions of 8 M ethanol, 0.045MTEOS, and 14 M ammonia, The particle size decreases with increasing temperature. In addition to this, a distorted spherical shape of the silica nanoparticles was observed under 8 M ethanol, 0.045 M TEOS, and 14 MNH3 (Fig. 7) at a temperature of 70 °C. The maximum average size of SiO2 particles was 462.03 nm and the SD (standard deviation) was 25.51 at a medium concentration of 6 M, 0.045 M TEOS and 14 M NH3 at 50 °C. In addition to this, a non-homogeneous distribution of particle size can be observed at 4 M ethanol, 0.045 M TEOS, 14 M ammonia. A reasonable explanation is that the silicon dioxide particles are stabilized by electrostatic repulsion. In the presence of a considerable amount of acid and free ammonia, the charge is derived from a silanol group. As a result, the ammonia obtained at a high temperature easily evaporates, and in the presence of high concentration of water, the reaction mixture causes the particle size to increase in turn.



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