No abstract

The hydro(solvo)thermal synthesis method was used to successfully synthesize bare silica aerogels and nano- and microparticle-embedded silica aerogels containing SiO2 and carbon microparticles in this study. New groups were added to these structures through modification. In the study, first, the effect of the variables was systematically examined to determine the optimum conditions. The most suitable recipe for silica aerogel was created. SiO2 and CP particles were synthesized, and modified silica aerogels were prepared with these particles and agents containing amine. For the characterization of synthesized silica aerogel, particles (SiO2, CP) and particle-embedded silica aerogels, TGA, SEM, DLS and BET-BJH techniques were used. These structures were used as adsorbent in environmental applications such as removing organic pollutants like 4-nitro phenol, methylene blue, Victoria blue, bromophenol blue etc. from aqueous media. In this environmental application, the adsorption capacity (mg/g) was determined by using UV-vis spectroscopy. The prepared structures are good adsorbents, and the adsorption capacity can be increased 18-fold with modification.

The purpose of the study is the preparation of silica aerogels by using the hydro(solvo)thermal synthesis assisted sol-gel method, the preparation of SiO2 particle-added silica aerogels, and the investigation of their potential use in the environment and energy fields. It has been observed that the prepared silica aerogels can be used removal applications as an adsorbent for 4-nitrophenol, methylene blue, Victoria blue, bromophenol blue organic contaminants. The aerogel was modified nanoparticle as SiO2 and -NH2 group increasing adsorption capacity minimum 3 fold. The energy application, silica aerogel was used as a catalyst. It has been observed that silica aerogels progressed rapidly in the reaction of NaBH4 with methanol Again silica aerogel was modified increase catalytic activity and prolonging selflife. SiO2 particles embedded silica aerogel was used same reaction. Self methanolysis reaction was completed about 20 minute at 25 ºC. By using protonated silica aerogel, the reaction was completed about 4 minutes at same temperature.