Journal
CRYSTENGCOMM
Volume 17, Issue 43, Pages 8207-8211Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ce01662b
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Funding
- CNPq [120482/2014-2, 350711/2012-7, 479644/2012-8]
- FAPESP [12/140045, 13/07296-2]
- CAPES
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This communication reports the formation of beta-silver molybdate (beta-Ag2MoO4) microcrystals synthesized by a simple precipitation method using different polar solvents (water, methanol, ethanol, 1-propanol and 1-butanol). These crystals were structurally characterized by means of X-ray diffraction (XRD) and Rietveld refinement. The crystal shapes and sizes were observed by field emission scanning electron microscopy (FE-SEM). Their optical properties were analyzed by ultraviolet-visible (UV-vis) diffuse reflectance spectroscopy. XRD patterns and Rietveld refinement data indicated all crystals have a spinel-type cubic structure. FE-SEM images revealed the crystals tend to increase the average size with reduction in the degree of polarity of the solvent. Finally, beta-Ag2MoO4 microcrystals exhibited a dependence of optical band gap energies (from 3.22 to 3.38 eV) on the intermediary energy levels.
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