SolGel Synthesis and Features
of the Structure of AuIn₂O₃ Nanocomposites

M. I. Ivanovskaya*, E. A. Ovodok, and D. A. Kotsikau

Research Institute for Physical Chemical Problems, Belarusian State University,
ul. Leningradskaya 14, Minsk, 220030 Republic of Belarus

*e-mail: ivanovskaya@bsu.by

Received December 10, 2010

Abstract—The specific features of the chemical state of gold and indium oxide in Au–In₂O₃ (0.01–1.0 wt %
Au) nanocomposites have been investigated by the methods of X-ray diffraction analysis, electron microscopy,
infrared and optical spectroscopy, electron paramagnetic resonance, and thermal analysis. Xerogels, powders,
and films obtained by the introduction of HAuCl₄ into the indium hydroxide sol and thermal treatment at 50–
700C have been studied. The mutual influence of the components on the size of the Au and In₂O₃ particles and
the state of their surface has been established. It has been shown that the synthesis of Au–In₂O₃ by the sol–
gel method leads to the formation of nanosized indium oxide particles with the high concentration of hydroxyl
groups on surfaces and favors the stabilization of gold in the form of nanoclusters and ion forms.

Keywords: sol–gel synthesis, Au–In₂O₃ nanocomposites, IR spectroscopy

DOI: 10.1134/S1087659611050051

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