Preparation of nanosorbents for chromatography by sol-gel technology based on tetraetoxisilane and metal oxides

The theme of my doctoral dissertation is " Preparation of nanosorbents for chromatography by sol-gel technology based on tetraetoxisilane and metal oxides" For chromatography, samples of the sorbent with a high specific surface area were obtained using traetoxylan and oxides of some d-metals using sol-gel technology. During the synthesis, various factors were studied for the formation of the surface area of ​​sorbents and the average pore diameter: in particular, the concentration of reagents, type of surfactant, temperature of the solution and the environment. The phase composition of the obtained sorbents was studied using an X-ray diffractometer (XRD) and IR spectroscopy, and the texture properties were studied using scanning electron microscopy (SEM). They also determined the specific surface area (SBET) and average pore diameter (D) by sorption of benzene and hexane.

Xromatografiya uchun zol-gel texnologiyasi asosida tetraetoksisilan va ayrim d-metallarning oksidlari yordamida yuqori solishtirma sirt yuzaga ega bo’lgan sorbent namunalari olindi. Sintez jarayonida sorbentlar sirt yuzasining hajmi va g’ovaklarning o’rtacha diametri shakllanishiga turli omillar: xususan reagentlar konsentratsiyasi, sirt faol moddaning turi, eritmaning harorat hamda muhitining ta’siri o’rganildi. Olingan sorbentlarning fazaviy tarkibi rentgen difraktometr (XRD) va IQ spektraskopiya usullarida, tekstur xususiyatlari esa skanerlovchi elektron mikroskopiya (SEM) usullari yordamida o’rganildi. Shuningdek ularda benzol va geksanning sorbsiyasi orqali solishtirma sirt yuzasi (S_BET), g’ovaklarning o’rtcha diametric (D) aniqlandi.