Effect of temperature on ultrasonic spray pyrolysis method in zinc tungstate: The relationship between structural and optical properties

Autor(es)

Santiago, Anderson A. G. ^[1] ; Tranquilin, Ricardo L. ^[2] ; Li, Maximo S. ^[3] ; Longo, Elson ^[2] ; Motta, Fabiana V. ^[1] ; Bomio, Mauricio R. D. ^[1]

Afiliação do(s) autor(es)

^[1] Fed Univ Rio Grande Norte UFRN, LSQM Lab Chem Synth Mat, Dept Mat Engn, POB 1524, Natal, RN - Brazil

^[2] Univ Fed Sao Carlos, CDMF UFSCar, POB 676, BR-13565905 Sao Carlos, SP - Brazil

^[3] Univ Sao Paulo, IFSC, Av Trabalhador Sao Carlense 400, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Materials Chemistry and Physics; v. 258, JAN 15 2021.
• Citações Web of Science: 0

Resumo

Zinc tungstate is an inorganic material which shows immense potential in diverse areas such as photoluminescence, sodium-ion batteries, and catalysis. Thus, the synthesis and characterization of ZnWO4 by ultrasonic spray pyrolysis using different heat treatments (between 750 degrees C and 1000 degrees C) is reported herein. X-ray diffraction and Raman spectroscopy were used to confirm the formation of the ZnWO4 with wolframite-type monoclinic structure. Scanning electron microscopy images revealed that the ZnWO4 particles have a microsphere-like morphology formed by the junction of different nanocrystals and its surface changed by heat treatment. The bandgap energies had a small variation among the samples (3.88 eV-3.98 eV). The photoluminescence emission of the samples showed a broadband spectrum with white light, in which structural alterations occurred with the increase in the heat treatment, which also increased the emission intensity and broadband. The samples synthesized at 950 degrees C and 1000 degrees C showed to be promising warmand neutral-white light emission sources. (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
• Processo FAPESP: 16/23891-6 - Modelagem computacional da matéria condensada
• Beneficiário: Alex Antonelli
• Modalidade de apoio: Auxílio à Pesquisa - Temático