Structural and optical characterization of mechanically milled Mg-TiO                         2                          and nitrided Mg-TiO                         x                         -N                         y                          nanostructures: Possible candidates for gas sensing application

A. S. Bolokang; B. P. Dhonge; H. C. Swart; C. J. Arendse; T. F.G. Muller; D. E. Motaung

doi:10.1016/j.apsusc.2015.11.138

Structural and optical characterization of mechanically milled Mg-TiO ₂ and nitrided Mg-TiO _x -N _y nanostructures: Possible candidates for gas sensing application

A. S. Bolokang, B. P. Dhonge, H. C. Swart, C. J. Arendse, T. F.G. Muller, D. E. Motaung

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

4 Citations (Scopus)

Abstract

We report for the first time on the gas sensing properties of novel ball milled and nitrided Mg-TiO ₂ prepared powder. Ball milling was performed on an Mg-TiO ₂ powder mixture for 60 hours (h), yielding a reduction in crystallite sizes. The milled powder was annealed in nitrogen at 650 °C, and crystalized into two face centred cubic (FCC) phases with different lattice parameters. The nitrided powder sample exhibited various morphologies including nanorods, as well as nanoparticles showing porous behaviour. The AFM and BET analyses showed high roughness and surface area for 60 h milled Mg-TiO ₂ nanostructures. The Mg-TiO ₂ 60 h and Mg-TiO ₂ -60 h-N ₂ materials were tested for their sensing performance towards H ₂ , NH ₃ and CH ₄ gases at various temperatures. The Mg-TiO ₂ 60 h sensing material showed high sensing response to NH ₃ , disclosing fast response-recovery time and high selectivity to NH ₃ .

Original language	English
Pages (from-to)	1047-1058
Number of pages	12
Journal	Applied Surface Science
Volume	360
DOIs	https://doi.org/10.1016/j.apsusc.2015.11.138
Publication status	Published - 1 Jan 2016
Externally published	Yes

Keywords

Gas sensing
Mechanical milling
Mg-TiO
Nanostructures
Nitridation

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.2015.11.138

Cite this

Bolokang, A. S., Dhonge, B. P., Swart, H. C., Arendse, C. J., Muller, T. F. G., & Motaung, D. E. (2016). Structural and optical characterization of mechanically milled Mg-TiO ₂ and nitrided Mg-TiO _x -N _y nanostructures: Possible candidates for gas sensing application. Applied Surface Science, 360, 1047-1058. https://doi.org/10.1016/j.apsusc.2015.11.138

Bolokang, A. S. ; Dhonge, B. P. ; Swart, H. C. et al. / Structural and optical characterization of mechanically milled Mg-TiO ₂ and nitrided Mg-TiO _x -N _y nanostructures : Possible candidates for gas sensing application. In: Applied Surface Science. 2016 ; Vol. 360. pp. 1047-1058.

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title = "Structural and optical characterization of mechanically milled Mg-TiO 2 and nitrided Mg-TiO x -N y nanostructures: Possible candidates for gas sensing application",

abstract = " We report for the first time on the gas sensing properties of novel ball milled and nitrided Mg-TiO 2 prepared powder. Ball milling was performed on an Mg-TiO 2 powder mixture for 60 hours (h), yielding a reduction in crystallite sizes. The milled powder was annealed in nitrogen at 650 °C, and crystalized into two face centred cubic (FCC) phases with different lattice parameters. The nitrided powder sample exhibited various morphologies including nanorods, as well as nanoparticles showing porous behaviour. The AFM and BET analyses showed high roughness and surface area for 60 h milled Mg-TiO 2 nanostructures. The Mg-TiO 2 60 h and Mg-TiO 2 -60 h-N 2 materials were tested for their sensing performance towards H 2 , NH 3 and CH 4 gases at various temperatures. The Mg-TiO 2 60 h sensing material showed high sensing response to NH 3 , disclosing fast response-recovery time and high selectivity to NH 3 .",

keywords = "Gas sensing, Mechanical milling, Mg-TiO, Nanostructures, Nitridation",

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

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Bolokang, AS, Dhonge, BP, Swart, HC, Arendse, CJ, Muller, TFG & Motaung, DE 2016, 'Structural and optical characterization of mechanically milled Mg-TiO ₂ and nitrided Mg-TiO _x -N _y nanostructures: Possible candidates for gas sensing application', Applied Surface Science, vol. 360, pp. 1047-1058. https://doi.org/10.1016/j.apsusc.2015.11.138

Structural and optical characterization of mechanically milled Mg-TiO ₂ and nitrided Mg-TiO _x -N _y nanostructures: Possible candidates for gas sensing application. / Bolokang, A. S.; Dhonge, B. P.; Swart, H. C. et al.
In: Applied Surface Science, Vol. 360, 01.01.2016, p. 1047-1058.

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

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AU - Bolokang, A. S.

AU - Dhonge, B. P.

AU - Swart, H. C.

AU - Arendse, C. J.

AU - Muller, T. F.G.

AU - Motaung, D. E.

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N2 - We report for the first time on the gas sensing properties of novel ball milled and nitrided Mg-TiO 2 prepared powder. Ball milling was performed on an Mg-TiO 2 powder mixture for 60 hours (h), yielding a reduction in crystallite sizes. The milled powder was annealed in nitrogen at 650 °C, and crystalized into two face centred cubic (FCC) phases with different lattice parameters. The nitrided powder sample exhibited various morphologies including nanorods, as well as nanoparticles showing porous behaviour. The AFM and BET analyses showed high roughness and surface area for 60 h milled Mg-TiO 2 nanostructures. The Mg-TiO 2 60 h and Mg-TiO 2 -60 h-N 2 materials were tested for their sensing performance towards H 2 , NH 3 and CH 4 gases at various temperatures. The Mg-TiO 2 60 h sensing material showed high sensing response to NH 3 , disclosing fast response-recovery time and high selectivity to NH 3 .

AB - We report for the first time on the gas sensing properties of novel ball milled and nitrided Mg-TiO 2 prepared powder. Ball milling was performed on an Mg-TiO 2 powder mixture for 60 hours (h), yielding a reduction in crystallite sizes. The milled powder was annealed in nitrogen at 650 °C, and crystalized into two face centred cubic (FCC) phases with different lattice parameters. The nitrided powder sample exhibited various morphologies including nanorods, as well as nanoparticles showing porous behaviour. The AFM and BET analyses showed high roughness and surface area for 60 h milled Mg-TiO 2 nanostructures. The Mg-TiO 2 60 h and Mg-TiO 2 -60 h-N 2 materials were tested for their sensing performance towards H 2 , NH 3 and CH 4 gases at various temperatures. The Mg-TiO 2 60 h sensing material showed high sensing response to NH 3 , disclosing fast response-recovery time and high selectivity to NH 3 .

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Bolokang AS, Dhonge BP, Swart HC, Arendse CJ, Muller TFG, Motaung DE. Structural and optical characterization of mechanically milled Mg-TiO ₂ and nitrided Mg-TiO _x -N _y nanostructures: Possible candidates for gas sensing application. Applied Surface Science. 2016 Jan 1;360:1047-1058. doi: 10.1016/j.apsusc.2015.11.138