Synthesis, growth process and photoluminescence properties of SrWO4 powders

被引：150

作者：

Sczancoski, J. C. ^{[1
]}

Cavalcante, L. S. ^{[1
]}

Joya, M. R. ^{[1
]}

Espinosa, J. W. M. ^{[2
]}

Pizani, P. S. ^{[1
]}

Varela, J. A. ^{[2
]}

Longo, E. ^{[2
]}

机构：

[1] Univ Fed Sao Carlos, LIEC, Dept Quim & Fis, BR-13565905 Sao Carlos, SP, Brazil

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

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2009年 / 330卷 / 01期

关键词：

SrWO4; Microwave; Growth process; Band gap; Photoluminescence; MICROWAVE-ASSISTED SYNTHESIS; SRMOO4; THIN-FILMS; ROOM-TEMPERATURE; STRONTIUM TUNGSTATE; OPTICAL-PROPERTIES; THERMAL-PROPERTIES; BAMOO4; POWDERS; BAWO4; CAWO4; MORPHOLOGY;

D O I：

10.1016/j.jcis.2008.10.034

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

SrWO4 powders were synthesized by the co-precipitation method and processed in a microwave-hydrothermal (MH) at 140 degrees C for different times. The obtained powders were analyzed by X-ray diffraction (XRD), micro-Raman (MR) spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, field-emission gun scanning electron microscopy (FEG-SEM), Ultraviolet-visible (UV-vis) absorption spectroscopy anti photoluminescence (PL) measurements. XRD patterns and MR spectra showed that the SrWO4 powders present a scheelite-type tetragonal structure without the presence of deleterious phases. Fr-IR spectra exhibited a high absorption band situated at 831.57 cm(-1), which was ascribed to the W-O antisymmetric stretching vibrations into the [WO4] tetrahedron groups. FEG-SEM micrographs suggested that the processing time is able to influence in the growth process and morphology of SrWO4 powders. UV-vis absorption spectra revealed different optical band gap values for these powders. A green PL emission at room temperature was verified in SrWO4 powders when excited with 488 nm wavelength. (C) 2008 Elsevier Ins. All rights reserved.

引用

页码：227 / 236

页数：10

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