Synthesis and properties of γ-Ga2O3–Al2O3 solid solutions


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Abstract

The textural and structural properties of mixed oxides Ga2O3–Al2O3, obtained via impregnating γ-Al2O3 with a solution of Ga(NO3)3 and subsequent heat treatment, are studied. According to the results from X-ray powder diffraction, gallium ions are incorporated into the structure of aluminum oxide to form a solid solution of spinel-type γ-Ga2O3–Al2O3 up to a Ga2O3 content of 50 wt % of the total weight of the sample, accompanied by a reduction in the specific surface area, volume, and average pore diameter. It is concluded that when the Ga2O3 content exceeds 50 wt %, the β-Ga2O3 phase is observed along with γ-Ga2O3–Al2O3 solid solution. 71Ga and 27Al NMR spectroscopy shows that gallium replaces aluminum atoms from the tetrahedral position to the octahedral coordination in the structure of γ-Ga2O3–Al2O3.

About the authors

T. N. Afonasenko

Institute of Hydrocarbon Processing

Author for correspondence.
Email: atnik@ihcp.ru
Russian Federation, Omsk, 644040

N. N. Leont’eva

Institute of Hydrocarbon Processing

Email: atnik@ihcp.ru
Russian Federation, Omsk, 644040

V. P. Talzi

Institute of Hydrocarbon Processing

Email: atnik@ihcp.ru
Russian Federation, Omsk, 644040

N. S. Smirnova

Kurnakov Institute of General and Inorganic Chemistry

Email: atnik@ihcp.ru
Russian Federation, Moscow, 119991

G. G. Savel’eva

Institute of Hydrocarbon Processing

Email: atnik@ihcp.ru
Russian Federation, Omsk, 644040

A. V. Shilova

Institute of Hydrocarbon Processing

Email: atnik@ihcp.ru
Russian Federation, Omsk, 644040

P. G. Tsyrul’nikov

Institute of Hydrocarbon Processing

Email: atnik@ihcp.ru
Russian Federation, Omsk, 644040

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