Evaluation of morphology and photoluminescent properties of PbMoO4 crystals by ultrasonic amplitude
| Autor: | L.X. Lovisa, Fabiana V. Motta, Giovane Montine Moreira Gurgel, O. L. A. Conceição, Mauricio R. D. Bomio, Elson Longo, Carlos A. Paskocimas, Máximo Siu Li |
|---|---|
| Přispěvatelé: | Federal University of Rio Grande do Norte, Universidade de São Paulo (USP), Universidade Estadual Paulista (Unesp) |
| Rok vydání: | 2016 |
| Předmět: |
Diffraction
Molybdic Acid Photoluminescence Materials science Absorption spectroscopy PbMoO4 Crystal growth 02 engineering and technology Molybdate 010402 general chemistry 01 natural sciences SÍNTESE QUÍMICA Crystal chemistry.chemical_compound Tetragonal crystal system Synthesis Time Oriented Attachment General Materials Science Emission spectrum Mechanical Engineering 021001 nanoscience & nanotechnology 0104 chemical sciences Crystallography chemistry Mechanics of Materials 0210 nano-technology Sonochemical Method |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP Repositório Institucional da UFRN Universidade Federal do Rio Grande do Norte (UFRN) instacron:UFRN |
| ISSN: | 1573-4803 0022-2461 |
| Popis: | Made available in DSpace on 2018-12-11T17:30:51Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-04-01 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Lead molybdate (PbMoO4) crystals were synthesized by the facile sonochemical method at 20 kHz frequency with a variable ultrasonic amplitude and synthesis time. These crystals were structurally characterized by X-ray diffraction (XRD). Field emission scanning electron microscopy images were employed to observe the evolution of the crystal growth process. XRD patterns indicate that these crystals have a scheelite-type tetragonal structure. The growth mechanism of PbMoO4 crystal was proposed to explain the development stages starting with precipitates formed by particles with disordered growth to form dendritic structures. The effect of the amplitude processing applied was rather significant for the size range of the particles produced. The optical properties were analyzed by ultraviolet–Visible (UV–Vis) absorption spectroscopy and photoluminescence (PL) measurements. The spectrum shows that the sample has a typical green emission. The origin of the PL emission spectrum of the metal molybdates might be ascribed to the charge-transfer transitions within [MoO4] clusters. Department of Materials Engineering Federal University of Rio Grande do Norte, Campus Lagoa Nova IFSC USP, Av. Trabalhador São Carlense, 400 LIEC IQ UNESP, Rua Francisco Degni s/n LIEC IQ UNESP, Rua Francisco Degni s/n CNPq: 402127/2013-7 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink