Gamma-Alumina (γ-Al2O3) by XPS

Abstract

This article presents the main core lines and the valence band x-ray photoelectron (XPS) spectra obtained for a commercial gamma-alumina (γ-Al2O3) powder. The electronic record includes the Al 2p, Al 2s, O 1s, O 2s, C 1s, and valence band spectra. Although it is usually difficult to distinguish among the various forms of aluminum oxide [Al2O3], oxyhydroxide [AlO(OH)] and hydroxide [Al(OH)3] based on the core XPS binding energies, the valence band spectra for many of these materials are unique. The valence band spectrum for γ-Al2O3 shows two broad distinct peaks that are separated by about 3.3 eV.