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Structural, Textural, and Electronic Properties of a Nanosized Mesoporous ZnxTi1-xO2-x Solid Solution Prepared by a Supercritical Drying Route

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posted on 03.11.2005, 00:00 by Yury V. Kolen'ko, Kirill A. Kovnir, Anton I. Gavrilov, Alexei V. Garshev, Pavel E. Meskin, Bulat R. Churagulov, Michel Bouchard, Christophe Colbeau-Justin, Oleg I. Lebedev, Gustaaf Van Tendeloo, Masahiro Yoshimura
Mesoporous nanosized TiO2 and ZnxTi1-xO2-x solid solution having a Zn content below 10 mol % with a particles size between 13 and 17 nm are prepared by a template-free sol-gel method followed by high-temperature supercritical drying in 2-propanol. The structural, textural, and electronic properties of the obtained nanomaterials are methodically investigated by using XRD, SEM, TEM, ED, HREM, EDX, ICP-OES, N2 adsorption−desorption, Raman spectroscopy, and diffuse reflectance UV−vis spectroscopy. It is shown that the proposed synthesis technique leads to the formation of a ZnxTi1-xO2-x solid solution based on the anatase crystal structure rather than a two-phase sample. High-resolution electron microscopy and electron diffraction indicate that the distribution of zinc atoms over the anatase structure does not lead to a considerable deformation of the crystal structure.