Aqueous mineralization process to synthesize uniform shuttle-like BaMoO 4 microcrystals at room temperature
Abstract
Single-crystalline BaMoO 4 microcrystals with uniform shuttle-like morphology have been successfully prepared via a facile aqueous solution mineralization process at room temperature. It was found that the pH value and the reaction temperature had important influences on the formation of the BaMoO 4 microcrystals. The shuttle-like microcrystals can be obtained in alkaline aqueous solution (pH=9-14), and when the pH value was adjusted to 6-7, cocoon-like microcrystals appeared. A possible two-stage growth process has been proposed, and the Ostwald ripening was responsible for the formation of the shuttle-like BaMoO 4 microcrystals. The products were characterized by XRD, XPS, FESEM, HRTEM and Raman spectroscopy. Room-temperature photoluminescence indicated that the as-prepared BaMoO 4 microcrystals had a strong blue emission peak centered at 438 nm.
- Publication:
-
Journal of Solid State Chemistry France
- Pub Date:
- November 2007
- DOI:
- 10.1016/j.jssc.2007.07.010
- Bibcode:
- 2007JSSCh.180.3288W