Morphological aspects and optical properties of Ag4P2O7

Abstract: The structural, morphological and optical properties of silver pyrophosphate (Ag4P2O7) powders were investigated in detail. This material was synthesized by chemical precipitation (CP), conventional hydrothermal and microwave-assisted hydrothermal. The crystallization of hexagonal Ag4P2O7 phase presented a dependence with both temperature and synthesis approach. A system composed of doughnut/hexagonal-shaped microparticles was evidenced for the powders obtained by CP. The hydrothermal treatments modified these particle shapes. Ultraviolet-visible spectra revealed a band gap controlled by indirect electronic transitions. Broadband photoluminescence spectra with maximum emissions in blue region were detected, suggesting the participation of several intermediary energy levels in the band gap. (C) 2019 Elsevier B.V. All rights reserved.

Author(s): Pereira, WD; Gozzo, CB; Longo, E; Leite, ER; Sczancoski, JC

MATERIALS LETTERS

DOI: 10.1016/j.matlet.2019.04.038