H2 gas sensor performance of NiO at high temperatures in gas mixtures

Steinebach, H.; Srinivasan, K.; Rieth, Loren; Solzbacher, Florian

doi:10.1016/j.snb.2010.09.027

Cited by 219 publications

(86 citation statements)

References 19 publications

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“…Currently, it is studied intensively due of its high chemical stability, electro catalysis, electron transfer capability and super-capacitance properties in particular [8][9][10][11][12][13]. Among the prominent technological applications of nano-scaled NiO, one can mention cathode material for alkaline batteries, p-type transparent conducting oxides, gas sensing, anodic electrochromic smart windows, and electrochemical storage devices as well as water electrolysis [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. But the major ongoing research focus on nanoscaled NiO is related mainly to its super-capacitor singular applications.…”

Section: Introductionmentioning

confidence: 99%

Single phase Bunsenite NiO nanoparticles green synthesis by Agathosma betulina natural extract

Thema

Manikandan

Gurib-Fakim

et al. 2016

Journal of Alloys and Compounds

241

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Section: Introductionmentioning

confidence: 99%

Single phase Bunsenite NiO nanoparticles green synthesis by Agathosma betulina natural extract

Thema

Manikandan

Gurib-Fakim

et al. 2016

Journal of Alloys and Compounds

241

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“…14 Among various magnetic nanoparticles, nickel oxide (NiO) have attracted much attention due to size dependent crystal structure, vibration modes and magnetic properties, and its applications in catalysis, energy conversion, storage devices, battery cathodes, antiferromagnetic (AFM) layer, gas sensors, electrochromic films, and transparent conducting films. 15,16 In addition, the development of NiO based nanoparticles and thin films were focused to obtain ferromagnetism (FM) above room temperature such that these oxides with cubic structure could easily facilitate integration of spintronic devices. Bulk NiO exhibits a cubic structure with a Néel temperature (T N ) of 523 K. However, Néel 17 suggested that fine particles of AFM nature should exhibit either a weak FM or superparamagnetism (SPM).…”

Section: Introductionmentioning

confidence: 99%

Enhanced room temperature ferromagnetism in antiferromagnetic NiO nanoparticles

2015

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We report systematic investigations of structural, vibrational, resonance and magnetic properties of nanoscale NiO powders prepared by ball milling process under different milling speeds for 30 hours of milling. Structural properties revealed that both pure NiO and as-milled NiO powders exhibit face centered cubic structure, but average crystallite size decreases to around 11 nm along with significant increase in strain with increasing milling speed. Vibrational properties show the enhancement in the intensity of one-phonon longitudinal optical (LO) band and disappearance of two-magnon band due to size reduction. In addition, two-phonon LO band exhibits red shift due to size-induced phonon confinement effect and surface relaxation. Pure NiO powder exhibit antiferromagnetic nature, which transforms into induced ferromagnetic after size reduction. The average magnetization at room temperature increases with decreasing the crystallite size and a maximum moment of 0.016 μB/f.u. at 12 kOe applied field and coercivity of 170 Oe were obtained for 30 hours milled NiO powders at 600 rotation per minute milling speed. The change in the magnetic properties is also supported by the vibrational properties. Thermomagnetization measurements at high temperature reveal a well-defined magnetic phase transition at high temperature (TC) around 780 K due to induced ferromagnetic phase. Electron paramagnetic resonance (EPR) studies reveal a good agreement between the EPR results and magnetic properties. The observed results are described on the basis of crystallite size variation, defect density, large strain, oxidation/reduction of Ni and interaction between uncompensated surfaces and particle core with lattice expansion. The obtained results suggest that nanoscale NiO powders with high TC and moderate magnetic moment at room temperature with cubic structure would be useful to expedite for spintronic devices.

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“…The nickel oxide (NiO) has attracted much attention and it has been used in magnetic devices, antibacterial applications, catalysis, electrode materials, sensors and electrical devices [9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%