Structural, morphological and optical investigation of beta-Ag2MoO4 microcrystals obtained with different polar solvents

Autor(es)

Cunha, F. S. ^[1] ; Sczancoski, J. C. ^[2] ; Nogueira, I. C. ^[3] ; de Oliveira, V. G. ^[1] ; Lustosa, S. M. C. ^[1] ; Longo, E. ^[2] ; Cavalcante, L. S. ^[1]

Afiliação do(s) autor(es)

^[1] PPQG DQ CCN Univ Estadual Piaui, BR-64002150 Teresina, PI - Brazil

^[2] Univ Estadual Paulista, BR-14801907 Araraquara, SP - Brazil

^[3] Inst Fed Maranhao, PPG Engn Mat, BR-65030005 Sao Luid, MA - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CrystEngComm; v. 17, n. 43, p. 8207-8211, 2015.
• Citações Web of Science: 12

Resumo

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. (AU)

• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs