Sorption characteristics of mesoporous composite SiO2·TiO2
Abstract
Samples of mesoporous sorbents based on tetraethoxysilane and titanium dioxide in an acidic medium were obtained using the sol-gel technology. The synthesized mesoporous sorbents are characterized by a large specific surface area of 700-950 m2/g, as well as an average diameter of 2,6-6,5 nm and a low pore volume of 0,60-0,90 cm3/g. It was found that a hysteresis loop is observed in the mesoporous sorbents during the adsorption of benzene and water vapors. The phase composition of the sorbents was studied by X-ray diffractometry (XRD), surface characteristics by a scanning electron microscope (SEM). The mesoporous sorbents can be used as a sorbent for gas chromatographic separation of light alkanes, olefins, aromatic hydrocarbons, alcohols, aldehydes, ketones, ethers and esters.
References
Zhang H, Wu J, Zhou L, Zhang D and Qi L 2007 Facile synthesis of monodisperse microspheres and gigantic hollow shells of mesoporous silica in mixed water- ethanol solvents Langmuir, 23(3), pp1107-1113
Uzokov J R, Mukhamadiev N K, Sayitkulov Sh M 2019 Preparation of nanosorbents for chromatography by sol-gel technology based on tetraetoxysilane and metal oxides. Uzbek chemical journal V 93 5. pp 78-84.
Minami T. 2013 Advanced sol–gel coatings for practical applications. Journal of sol-gel science and technology, 65(1), pp 4-11.
Esposito S 2019 “Traditional” sol-gel chemistry as a powerful tool for the preparation of supported metal and metal oxide catalysts. Materials, 12(4), pp 668.
Ozin G A 1997 Morphogenesis of biomineral and morphosynthesis of biomimetic forms. Accounts of Chemical Research, 30(1), pp 17-27.
Li W, Yue Q, Deng Y, and Zhao D 2013 Mesoporous materials: ordered mesoporous Materials Based on Interfacial Assembly and Engineering (Adv. Mater. 37/2013). Advanced Materials, 25(37), pp 5128-5128.
Galarneau A, Cambon H, Martin T, De Ménorval L C, Brunel D, Di Renzo F and Fajula F 2002 SBA-15 versus MCM-41: are they the same materials. Stud Surf Sci Catal, 141 pp 395-402.
Magalhães G O D, Ribeiro J D O N, Vasconcelos D C L and Vasconcelos W L 2018 production of pure granules of Sba-15 mesoporous silica. Materials Research, 21(6) 24.
Sakka S and Kozuka H (Eds.). 2005 Handbook of sol-gel science and technology. 1. Sol-gel processing (Vol. 1). Springer Science and Business Media.
Esposito S 2019 “Traditional” sol-gel chemistry as a powerful tool for the preparation of supported metal and metal oxide catalysts. Materials, 12(4), 668.
Mecarthy G J and Thedchanamoorthy A 1988 Semi-quantitative X-ray diffraction analysis of fly ash by the reference intensity ratio method. MRS Online Proceedings Library Archive, 136.
Bunaciu A A, UdriŞTioiu E G and Aboul-Enein H Y 2015 X-ray diffraction: instrumentation and applications. Critical reviews in analytical chemistry, 45(4), 289-299.
Taba P 2010 Adsorption of Water and Benzene Vapour in Mesoporous Materials. Makara Journal of Science.
Inagaki S and Fukushima Y 1998 Adsorption of water vapor and hydrophobicity of ordered mesoporous silica, FSM-16. Microporous and Mesoporous Materials, 21(4-6), 667-672.
