dor_id: 4107874

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650.#.4.x: Físico Matemáticas y Ciencias de la Tierra

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100.1.#.a: Secundino Sánchez, O.; Diaz Reyes, J.; Sánchez Ramírez, J. F.; Jiménez Pérez, J. L.

100.1.#.u: SIP-IPN

524.#.#.a: Secundino Sánchez, O., et al. (2019). Structural and optical characterization of the crystalline phase transformation of electrospinning TiO2 nanofibres by high-temperatures annealing. Revista Mexicana de Física; Vol 65, No 5 Sept-Oct: 459-467. Recuperado de https://repositorio.unam.mx/contenidos/4107874

245.1.0.a: Structural and optical characterization of the crystalline phase transformation of electrospinning TiO2 nanofibres by high-temperatures annealing

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Facultad de Ciencias, UNAM

264.#.0.c: 2019

264.#.1.c: 2019-09-02

653.#.#.a: Electrospinning technique; semiconductor nanofibres; titanium dioxide; structural properties; Raman spectroscopy; X-ray diffraction

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001.#.#.#: oai:ojs.rmf.smf.mx:article/4247

041.#.7.h: eng

520.3.#.a: The electrospinning technique has been used to synthesize TiO2 nanofibres, which by annealing at high temperatures in a wide range achieves the crystal phase transformation of anatase to rutile passing through the anatase+rutile mixed. The investigated temperature range was 0-1000°C. The TiO2 nanofibres chemical stoichiometry and surface morphology were obtained by Scanning Electron Microscopy and Energy Dispersive Spectrometry. The nanofibres diameter was ranged from 137.0 to 115.3 nm in the annealing temperature interval of 0-1000°C. The influence of the annealing temperature on the structure and crystal phase quality of the TiO2crystal has been investigated by X-ray diffraction and Raman scattering. Clear evidence of nanofibres structural transformation from pure anatase to pure rutile structures, including the quasi-amorphous and anatase+rutile mixed phases has been confirmed by Raman scattering. By X-ray diffraction was found that the nanofibres crystalline phases present as preferential growth direction (101) for anatase and (110) for rutile. The Raman spectroscopy exhibits the anomalous behaviour for band broadening and shifting of Raman bands with increasing crystallite size that form the nanofibres. The room-temperature photoluminescence presents radiative bands whose main band redshifts, from 2.56 to 1.32 eV, as the crystalline phase transforms in the investigated annealing temperature range.

773.1.#.t: Revista Mexicana de Física; Vol 65, No 5 Sept-Oct (2019): 459-467

773.1.#.o: https://rmf.smf.mx/ojs/rmf/index

046.#.#.j: 2020-11-25 00:00:00.000000

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310.#.#.a: Bimestral

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758.#.#.1: https://rmf.smf.mx/ojs/rmf/index

doi: https://doi.org/10.31349/RevMexFis.65.459

handle: 3e2bda263112d4d3

harvesting_date: 2020-09-23 00:00:00.0

856.#.0.q: application/pdf

last_modified: 2020-11-27 00:00:00

license_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode.es

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Artículo

Structural and optical characterization of the crystalline phase transformation of electrospinning TiO2 nanofibres by high-temperatures annealing

Secundino Sánchez, O.; Diaz Reyes, J.; Sánchez Ramírez, J. F.; Jiménez Pérez, J. L.

Facultad de Ciencias, UNAM, publicado en Revista Mexicana de Física, y cosechado de Revistas UNAM

Licencia de uso

Procedencia del contenido

Entidad o dependencia
Facultad de Ciencias, UNAM
Revista
Repositorio
Contacto
Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

Cita

Secundino Sánchez, O., et al. (2019). Structural and optical characterization of the crystalline phase transformation of electrospinning TiO2 nanofibres by high-temperatures annealing. Revista Mexicana de Física; Vol 65, No 5 Sept-Oct: 459-467. Recuperado de https://repositorio.unam.mx/contenidos/4107874

Descripción del recurso

Autor(es)
Secundino Sánchez, O.; Diaz Reyes, J.; Sánchez Ramírez, J. F.; Jiménez Pérez, J. L.
Adscripción del autor
SIP-IPN
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Structural and optical characterization of the crystalline phase transformation of electrospinning TiO2 nanofibres by high-temperatures annealing
Fecha
2019-09-02
Resumen
The electrospinning technique has been used to synthesize TiO2 nanofibres, which by annealing at high temperatures in a wide range achieves the crystal phase transformation of anatase to rutile passing through the anatase+rutile mixed. The investigated temperature range was 0-1000°C. The TiO2 nanofibres chemical stoichiometry and surface morphology were obtained by Scanning Electron Microscopy and Energy Dispersive Spectrometry. The nanofibres diameter was ranged from 137.0 to 115.3 nm in the annealing temperature interval of 0-1000°C. The influence of the annealing temperature on the structure and crystal phase quality of the TiO2crystal has been investigated by X-ray diffraction and Raman scattering. Clear evidence of nanofibres structural transformation from pure anatase to pure rutile structures, including the quasi-amorphous and anatase+rutile mixed phases has been confirmed by Raman scattering. By X-ray diffraction was found that the nanofibres crystalline phases present as preferential growth direction (101) for anatase and (110) for rutile. The Raman spectroscopy exhibits the anomalous behaviour for band broadening and shifting of Raman bands with increasing crystallite size that form the nanofibres. The room-temperature photoluminescence presents radiative bands whose main band redshifts, from 2.56 to 1.32 eV, as the crystalline phase transforms in the investigated annealing temperature range.
Tema
Electrospinning technique; semiconductor nanofibres; titanium dioxide; structural properties; Raman spectroscopy; X-ray diffraction
Idioma
eng
ISSN
2683-2224 (digital); 0035-001X (impresa)

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