Synthesis of acicular alpha-Bi2O3 microcrystals by microwave-assisted hydrothermal method

Autor(es)

Schmidt, Samara ^{[1, 2]} ; Kubaski, Evaldo T. ^[3] ; Volanti, Diogo P. ^[4] ; Sequinel, Thiago ^[5] ; Bezzon, Vinicius D. N. ^[1] ; Tebcherani, Sergio M. ^[6]

Afiliação do(s) autor(es)

^[1] UNESP, Inst Chem, Dept Phys Chem, Araraquara, SP - Brazil

^[2] Univ Tecnol Fed Parana, Dept Prod Engn, Ponta Grossa, PR - Brazil

^[3] Univ Estadual Ponta Grossa, Dept Mat Engn, Ave Gen Carlos Cavalcanti 4748, BR-84030900 Ponta Grossa, PR - Brazil

^[4] UNESP, IBILCE, Dept Chem & Environm Sci, Sao Jose Do Rio Preto, SP - Brazil

^[5] Fed Univ Grande Dourados, Fac Exact Sci & Technol FACET, Dourados, MS - Brazil

^[6] Univ Estadual Ponta Grossa, Dept Chem, Ponta Grossa, PR - Brazil

• Tipo de documento: Artigo Científico
• Fonte: PARTICULATE SCIENCE AND TECHNOLOGY; v. 37, n. 8, p. 923-927, NOV 17 2019.
• Citações Web of Science: 0

Resumo

Materials based on bismuth(III) oxide are candidate to be used in optical and electronic devices because of their properties such as a variable band gap, photoconductivity, photoluminescence, high refractive index, and dielectric permittivity. These properties are dependent of several factors, e.g., present phases and crystal morphology. The microwave-assisted hydrothermal method (MAH) is a fast and efficient approach of synthesis to obtain semiconductor powders. However, the synthesis of monoclinic bismuth oxide (alpha-Bi2O3) with acicular morphology by MAH was not found in literature. In this paper, microcrystals of acicular alpha-Bi2O3 (monophasic) were successfully obtained by MAH using a synthesis temperature of 80 degrees C for 0.5 h. X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron, and transmission electron microscopies showed the formation of a monoclinic structure (space group P21/c) with acicular morphology that grew along the {[}001] direction. The temperature and time necessary to synthetize acicular microcrystals were significantly lower than those found for acicular microcrystals obtained by conventional hydrothermal method. (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