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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Study of structural and optical properties of CaMoO4 nanoparticles synthesized by the microwave-assisted solvothermal method

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Author(s):
Botelho, G. ; Nogueira, I. C. ; Moraes, E. ; Longo, E.
Total Authors: 4
Document type: Journal article
Source: Materials Chemistry and Physics; v. 183, p. 110-120, NOV 1 2016.
Web of Science Citations: 3
Abstract

Calcium molybdate (CaMoO4) nanoparticles were synthesized by using a rapid assisted-microwave solvothermal method. X-ray diffraction measurements, Fourier transform Raman and Fourier transform infrared spectroscopies, revealed that the samples all have a scheelite-type tetragonal structure. In addition, the data obtained from the Rietveld refinements revealed distortions of the {[}Ca-O] and {[}Mo-O] bonds that led, in turn, to distortions of the {[}CaO8] and {[}MoO4] clusters. The presence of irregular spherical-like CaMoO4 nanoparticles and the corresponding crystallographic arrangement were confirmed and determined via transmission electron microscopy and high resolution transmission electron microscopy, respectively. First-principles quantum mechanical calculations based on the density functional theory at the B3LYP level were employed in order to understand the band structure and density of states of CaMoO4 in the excited singlet and triplet states. Furthermore, the optical properties were investigated by performing ultraviolet-visible spectroscopy and photoluminescence (PL) measurements. Maximum PL emission of CaMoO4 powders was detected in the green-region wavelength of the electromagnetic spectrum; this emission was attributed to the distorted {[}MoO4] clusters. (C) 2016 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 08/57872-1 - National Institute for Materials Science in Nanotechnology
Grantee:Elson Longo da Silva
Support type: Research Projects - Thematic Grants
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC