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Spatial organization of sodium nitrite nanoparticles in porous glass with interface modified by titanium dioxide
Russian version
Alekseeva O. A. 1, Tomkovich M. V. 1, Naberezhnov A. A. 1, Sysoeva A. A. 1, Gorshkova Yu. E. 2,3
1Ioffe Institute, St. Petersburg, Russia
2Frank Neutron Physics Laboratory, Joint Nuclear Research Institute, Dubna, Moscow oblast, Russia
3Kazan Federal University, Kazan, Russia
Email: alekseeva.oa@mail.ioffe.ru, marya.tom83@gmail.com, alex.nabereznov@mail.ioffe.ru, annasysoeva07@mail.ru, yulia.gorshkova@jinr.ru
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The results of a study of the effect of titanium oxide modification of the porous glass sodium nitrite interface on the spatial organization of NaNO2 nanoparticles obtained by introducing sodium nitrite from an aqueous solution into the pore space of a mesoporous glass matrix with an average channel (pore) diameter of 6(1) nm (PG6) are presented. It is shown, that in the nanocomposite (NCM) PG6+NaNO2 sodium nitrite forms nanoagglomerates with a radius of gyration of 68 nm, in which the amorphous and crystalline phases coexist. On a spatial scale from 2 to 27 nm, a surface fractal-type structure is realized in this NCM, described by the scattering law I(Q)~ Q-α (Q is the transferred momentum) with α=3.57(2). The sizes of coherent scattering regions for sodium nitrite nanoparticles in PG6+NaNO2 and PG6+TiO2+NaNO2 nanocomposites (~ 10 nm) have been determined. Keywords: sodium nitrite, nanocomposite materials, crystal structure, small-angle X-ray scattering, X-ray diffraction, interface.
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