Characteristics of the mechanical milling on the room temperature ferromagnetism and sensing properties of TiO                         2                          nanoparticles

A. S. Bolokang; F. R. Cummings; B. P. Dhonge; H. M.I. Abdallah; T. Moyo; H. C. Swart; C. J. Arendse; T. F.G. Muller; D. E. Motaung

doi:10.1016/j.apsusc.2015.01.055

Characteristics of the mechanical milling on the room temperature ferromagnetism and sensing properties of TiO ₂ nanoparticles

A. S. Bolokang, F. R. Cummings, B. P. Dhonge, H. M.I. Abdallah, T. Moyo, H. C. Swart, C. J. Arendse, T. F.G. Muller, D. E. Motaung

Research output: Contribution to journal › Article › peer-review

45 Citations (Scopus)

Abstract

Abstract We report on the correlation between defect-related emissions, the magnetization and sensing of TiO ₂ nanoparticles (NPs) prepared by milling method. Surface morphology analyses showed that the size of the TiO ₂ NPs decreases with milling time. Raman and XRD studies demonstrated that the structural properties of the TiO ₂ transform to orthorhombic structure upon milling. Magnetization improved with an increase of a defect-related band originating from oxygen vacancies (V _O ), which can be ascribed to a decrease in the size of the NPs due to the milling time. Moreover, the longer-milled TiO ₂ exhibited enhanced gas-sensing properties to humidity in terms of sensor response, with about 12 s response time at room temperature. A combination of photoluminescence, X-ray photoelectron spectroscopy, vibrating sample magnetometer and sensing analyses demonstrated that a direct relation exists between the magnetization, sensing and the relative occupancy of the V _O present on the surface of TiO ₂ NPs.

Original language	English
Article number	29492
Pages (from-to)	362-372
Number of pages	11
Journal	Applied Surface Science
Volume	331
DOIs	https://doi.org/10.1016/j.apsusc.2015.01.055
Publication status	Published - 15 Mar 2015
Externally published	Yes

Keywords

Magnetic properties
Mechanical milling
Sensing properties
TiO -NPs

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
General Physics and Astronomy
Surfaces and Interfaces
Surfaces, Coatings and Films

Access to Document

10.1016/j.apsusc.2015.01.055

Cite this

Bolokang, A. S., Cummings, F. R., Dhonge, B. P., Abdallah, H. M. I., Moyo, T., Swart, H. C., Arendse, C. J., Muller, T. F. G., & Motaung, D. E. (2015). Characteristics of the mechanical milling on the room temperature ferromagnetism and sensing properties of TiO ₂ nanoparticles Applied Surface Science, 331, 362-372. Article 29492. https://doi.org/10.1016/j.apsusc.2015.01.055

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title = " Characteristics of the mechanical milling on the room temperature ferromagnetism and sensing properties of TiO 2 nanoparticles ",

abstract = " Abstract We report on the correlation between defect-related emissions, the magnetization and sensing of TiO 2 nanoparticles (NPs) prepared by milling method. Surface morphology analyses showed that the size of the TiO 2 NPs decreases with milling time. Raman and XRD studies demonstrated that the structural properties of the TiO 2 transform to orthorhombic structure upon milling. Magnetization improved with an increase of a defect-related band originating from oxygen vacancies (V O ), which can be ascribed to a decrease in the size of the NPs due to the milling time. Moreover, the longer-milled TiO 2 exhibited enhanced gas-sensing properties to humidity in terms of sensor response, with about 12 s response time at room temperature. A combination of photoluminescence, X-ray photoelectron spectroscopy, vibrating sample magnetometer and sensing analyses demonstrated that a direct relation exists between the magnetization, sensing and the relative occupancy of the V O present on the surface of TiO 2 NPs.",

keywords = "Magnetic properties, Mechanical milling, Sensing properties, TiO -NPs",

author = "Bolokang, {A. S.} and Cummings, {F. R.} and Dhonge, {B. P.} and Abdallah, {H. M.I.} and T. Moyo and Swart, {H. C.} and Arendse, {C. J.} and Muller, {T. F.G.} and Motaung, {D. E.}",

year = "2015",

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journal = "Applied Surface Science",

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Bolokang, AS, Cummings, FR, Dhonge, BP, Abdallah, HMI, Moyo, T, Swart, HC, Arendse, CJ, Muller, TFG & Motaung, DE 2015, ' Characteristics of the mechanical milling on the room temperature ferromagnetism and sensing properties of TiO ₂ nanoparticles ', Applied Surface Science, vol. 331, 29492, pp. 362-372. https://doi.org/10.1016/j.apsusc.2015.01.055

Characteristics of the mechanical milling on the room temperature ferromagnetism and sensing properties of TiO ₂ nanoparticles . / Bolokang, A. S.; Cummings, F. R.; Dhonge, B. P. et al.
In: Applied Surface Science, Vol. 331, 29492, 15.03.2015, p. 362-372.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Characteristics of the mechanical milling on the room temperature ferromagnetism and sensing properties of TiO 2 nanoparticles

AU - Bolokang, A. S.

AU - Cummings, F. R.

AU - Dhonge, B. P.

AU - Abdallah, H. M.I.

AU - Moyo, T.

AU - Swart, H. C.

AU - Arendse, C. J.

AU - Muller, T. F.G.

AU - Motaung, D. E.

PY - 2015/3/15

Y1 - 2015/3/15

N2 - Abstract We report on the correlation between defect-related emissions, the magnetization and sensing of TiO 2 nanoparticles (NPs) prepared by milling method. Surface morphology analyses showed that the size of the TiO 2 NPs decreases with milling time. Raman and XRD studies demonstrated that the structural properties of the TiO 2 transform to orthorhombic structure upon milling. Magnetization improved with an increase of a defect-related band originating from oxygen vacancies (V O ), which can be ascribed to a decrease in the size of the NPs due to the milling time. Moreover, the longer-milled TiO 2 exhibited enhanced gas-sensing properties to humidity in terms of sensor response, with about 12 s response time at room temperature. A combination of photoluminescence, X-ray photoelectron spectroscopy, vibrating sample magnetometer and sensing analyses demonstrated that a direct relation exists between the magnetization, sensing and the relative occupancy of the V O present on the surface of TiO 2 NPs.

AB - Abstract We report on the correlation between defect-related emissions, the magnetization and sensing of TiO 2 nanoparticles (NPs) prepared by milling method. Surface morphology analyses showed that the size of the TiO 2 NPs decreases with milling time. Raman and XRD studies demonstrated that the structural properties of the TiO 2 transform to orthorhombic structure upon milling. Magnetization improved with an increase of a defect-related band originating from oxygen vacancies (V O ), which can be ascribed to a decrease in the size of the NPs due to the milling time. Moreover, the longer-milled TiO 2 exhibited enhanced gas-sensing properties to humidity in terms of sensor response, with about 12 s response time at room temperature. A combination of photoluminescence, X-ray photoelectron spectroscopy, vibrating sample magnetometer and sensing analyses demonstrated that a direct relation exists between the magnetization, sensing and the relative occupancy of the V O present on the surface of TiO 2 NPs.

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Bolokang AS, Cummings FR, Dhonge BP, Abdallah HMI, Moyo T, Swart HC et al. Characteristics of the mechanical milling on the room temperature ferromagnetism and sensing properties of TiO ₂ nanoparticles Applied Surface Science. 2015 Mar 15;331:362-372. 29492. doi: 10.1016/j.apsusc.2015.01.055