Optical Characteristics of Porous Alumina Modified by Chromium Oxide
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2019-03-26 |
| Journal | International Journal of Nanoscience |
| Authors | Н. И. Мухуров, И. В. Гасенкова, С. П. Жвавый, É. É. Kolesnik |
Abstract
Section titled “Abstract”In this paper, the chromium ions luminescence in Cr 2 O 3 /Al 2 O 3 nanocomposites has been studied. No photoluminescence from the nanocomposite was observed at room temperature, while at liquid nitrogen temperature the two broad bands were detected at 497 and 665[Formula: see text]nm caused by [Formula: see text]- and [Formula: see text]-type oxygen vacancies and Cr[Formula: see text] and Mn[Formula: see text]impurity centers. The photoluminescence band observed at 616[Formula: see text]nm is attributed to Cr[Formula: see text] ions. The excitation of Cr[Formula: see text] ions occurs at 265 and 375[Formula: see text]nm, and their formation is the result of Cr[Formula: see text]-Cr[Formula: see text] redox processes on the surface of Cr 2 O 3 crystallites at the annealing temperatures of 400-[Formula: see text]C.
Tech Support
Section titled “Tech Support”Original Source
Section titled “Original Source”References
Section titled “References”- 1976 - Optical Spectra of Transition Metal Ions in Crystals