SYNTHESIS OF SiO2 · xZrO2 NANOPOROUS SORBENTS AND 
THEIR TEXTURE AND SORPTION CHARACTERISTICS

Uzokov Javlon Rustamboyevich; Muxamadiyev Nurali Qurbonaliyevich; Turayev  Begzod Gulomovich; Kungratov Kamoliddin

doi:10.5281/zenodo.8020839

SYNTHESIS OF SiO2 · xZrO2 NANOPOROUS SORBENTS AND THEIR TEXTURE AND SORPTION CHARACTERISTICS

09.06.2023 International Scientific Journal "Science and Innovation". Series A. Volume 2 Issue 6

Uzokov Javlon Rustamboyevich, Muxamadiyev Nurali Qurbonaliyevich, Turayev Begzod Gulomovich, Kungratov Kamoliddin

Abstract. Composite sorbents containing SiO2 ·xZrO2 (x=0,3; 0,5; 0,7) were synthesized using sol-gel technology in different solution media and temperatures. The effect of quantitative ratios of reagents, solution medium and temperature on texture characteristics of the sorbents: the specific surface area, the formation of pores, the size and the average diameter were studied. The texture and sorption characteristics of the sorbents were studied by adsorption of benzene, hexane, and toluene vapors in a McBen-Bakra vacuum device. According to it, the specific surface area of the sorbents prepared at 30°C (SBET, m2/g) is 710,3÷975,6 m2/g, the average diameter of the pores is 0,8÷2,5 nm, the specific volume of the pores (Vs cm3/g) was found to be equal to 0,155÷0,309 cm3/g. In the sorbents synthesized at 50°C, 70°C and 90°C, the specific surface area was found to be 350,6 ÷ 870,9 m2/g, and the average diameter of the pores was 2,8÷72,8 nm. The phase composition of the sorbents was studied by X-ray diffractometry (XRD), the surface morphology by scanning electron microscopy, and the element composition by X-ray microanalysis.

Keywords: sol-gel technology, nanocomposite, sorption isotherm, average diameter of pores, specific surface area

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