Autor(es)

Suman, P. H. ^[1] ; Longo, E. ^[1] ; Varela, J. A. ^[1] ; Orlandi, M. O. ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Dept Phys Chem, BR-14800900 Araraquara, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Nanoscience and Nanotechnology; v. 14, n. 9, p. 6662-6668, SEP 2014.
• Citações Web of Science: 6

Resumo

This paper reports both the controlled synthesis of Sn3O4 nanobelts by carbothermal reduction method and the gas sensor properties of these nanostructures. The synthesized material was characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy and gas sensor measurements. The results showed that the Sn3O4 nanobelts grow in a layered way and the careful control of experimental parameters is fundamental for stabilization of the correct phase. From the gas sensor measurements using oxygen as analyte gas, it was observed that the Sn3O4 nanobelts exhibit n-type behavior and both the sensitivity and the response time are dependent on the oxygen concentration. A model based on molecules adsorption was proposed to illustrate the mechanism of gas detection of these nanostructures. In summary, these results indicate that Sn3O4 nanobelts synthesized by carbothermal reduction method are promising to be applied as gas sensors. (AU)

• Processo FAPESP: 06/56836-6 - Estudo do crescimento e caracterização de materiais semicondutores unidimensionais nanoestruturados puros e dopados
• Beneficiário: Marcelo Ornaghi Orlandi
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 09/13491-7 - Caracterização Sensora de Nanoestruturas de Óxido de Estanho
• Beneficiário: Pedro Henrique Suman
• Modalidade de apoio: Bolsas no Brasil - Mestrado