Ammonia gas sensor based on a spinel semiconductor, Co0.8Ni0.2Fe2O4 nanomaterial

Gedam, N.N.; Padole, P. R.; Rithe, S. K.; Chaudhari, G. N.

doi:10.1007/s10971-009-1942-1

Cited by 42 publications

(10 citation statements)

References 16 publications

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“…[3][4][5][6] Natural spinels are frequent in most geological environments and occur as main or accessory minerals in different rocks in the Earth's lower crust and upper mantle. Being the cation distribution highly sensitive to temperature, pressure, oxygen fugacity, and bulk rock and fluid compositions, its full knowledge is extremely useful for constructing mineral geothermometers, geobarometers, and oxygen fugacity sensors for petrologic studies.…”

Section: Introductionmentioning

confidence: 99%

Raman fingerprint of chromate, aluminate and ferrite spinels

D’Ippolito

Andreozzi

Bersani

et al. 2015

J Raman Spectroscopy

328

221

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Synthetic and natural spinel single crystals having compositions closely approaching spinel end-members ZnCr2O4, MgCr2O4, FeCr2O4, ZnAl2O4, MgAl2O4, CoAl2O4, FeAl2O4, MnAl2O4, MgFe2O4, and FeFe2O4 were investigated by Raman spectroscopy in the 100-900cm-1 range using both the red 632.8nm line of a He-Ne laser and the blue 473.1nm line of a solid-state Nd:YAG laser. Each end-member exhibits a Raman fingerprint with at least one peculiar peak in terms of Raman shift and relative intensity. Chromates and ferrites exhibit the most intense A1g mode at around 680cm-1, at lower wavenumbers than in the aluminates, in agreement with the heavier atomic mass of Cr and Fe with respect to Al. For aluminate spinels, the most intense and diagnostic peaks in the spectrum are as follows: F2g(1) at 202cm-1 for MnAl2O4, Eg at 408cm-1 for MgAl2O4, F2g(2) at 516cm-1 for CoAl2O4, F2g(3) at 661cm-1 for ZnAl2O4, and A1g at 748cm-1 for FeAl2O4. Noteworthy, analyzing the A1g, F2g(3), and, in particular, the Eg peak positions, it is possible to establish which subgroup a spinel belongs to; moreover, a careful inspection of both position and relative intensity of the same peaks allows the determination of the end-member type

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Section: Introductionmentioning

confidence: 99%

Raman fingerprint of chromate, aluminate and ferrite spinels

D’Ippolito

Andreozzi

Bersani

et al. 2015

J Raman Spectroscopy

328

221

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“…Nano-scale ferrites are associated with revolutionary applications in the field of electronic technology as well as biotechnology [1]. Nickel doped cobalt ferrites are technologically important nowadays as they are found to be suitable for high frequency applications [2], gas sensors [3], etc.…”

Section: Introductionmentioning

confidence: 99%

“…To date, a wide variety of methods are employed for the synthesis of ferrites in their nanoscale, such as, sol-gel method [4], co-precipitation [5], ceramic technique [6], hydrothermal method [7], solvothermal method [8], etc. However, all the above said methods may have their own disadvantages like complicated procedure, usage of non-green solvents, need of very high processing temperature and expensive equipments, production of particles with uncontrolled morphologies, etc., Recently, thermal decomposition method has attained considerable interest due to its simple process, low cost, products with high purity and crystallinity and a larger surface area of the as-prepared particles.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterisation of Ni0.25Co0.75Fe2O4 nanostructures

Kalimuthu¹,

Sinduja²,

Manimekalai³

2016

Bull. Chem. Soc. Eth.

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ABSTRACT. The synthesis of Ni0.25Co0.75Fe2O4 nanoparticles has been achieved by a simple thermal decomposition method from the inorganic precursor, Ni0.25Co0.75Fe2(cin)3(N2H4)5, which was obtained by a novel precipitation method from the corresponding metal salts, cinnamic acid and hydrazine hydrate. The precursor was characterised by hydrazine and metal analyses, infrared spectral analysis and thermo gravimetric analysis. On appropriate annealing, Ni0.25Co0.75Fe2(cin)3(N2H4)5 yielded Ni0.25Co0.75Fe2O4 nanoparticles, which were characterised for their size and structure using X-ray diffraction (XRD), high resolution transmission electron microscopic (HRTEM), selected area electron diffraction (SAED) and scanning electron microscopic (SEM) techniques.

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“…Metal-oxide spinels is a kind of important functional semiconductor materials due to their high thermal stability, low surface acidity, hydrophobicity electronic and optical properties, which have a broad range of promising applications, such as semiconductor [1,2], sensor [3], laser [4], electroluminescent displays [5] and heterogeneous catalysis [6], etc. Among the most interesting materials of this kind, zinc aluminate (ZnAl 2 O 4 ), belonging to Fd3m space group [7], is a typical compound semiconductor with wide band gap energy (3.8-3.9 eV).…”

Section: Introductionmentioning

confidence: 99%

“…2 Á 6H 2 O were dissolved in the deionized water to obtain a solution of 0.015 mol/L. After the solution was transparent, a stoichiometic amount of EDTA was added to the solution in the molar ratio 1.5:1 with respect to the cations to complex the cations.…”

Section: Introductionmentioning

confidence: 99%

Optical properties and microstructure of Ni doped ZnAl2O4 nanopowders synthesized by sol–gel method

Wei

Chen

et al. 2015

J Mater Sci: Mater Electron

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Zn 1-x Ni x Al 2 O 4 (x = 0, 0.025, 0.05, 0.075, 0.10) nanopowders were successfully synthesized by solgel method, and the microstructure, morphology and optical properties were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), highresolution transmission electron microscopy (HRTEM), fourier transform infrared spectroscopy (FT-IR), diffuse reflectance spectroscopy (DRS) and photoluminescence spectra (PL). The experiment results show that all samples synthesized by this method possess spinel structure with good crystallization, no other impurity phase are observed, the morphology are dandruff-like. The band gap values of the Zn 1-x Ni x Al 2 O 4 samples are 4.02, 3.80, 3.70, 3.63 and 3.55 eV, respectively. The band gap of samples decreases with the increasing Ni doping concentration, and the PL spectra of the samples show the photoluminescence quenching.

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Ammonia gas sensor based on a spinel semiconductor, Co0.8Ni0.2Fe2O4 nanomaterial

Cited by 42 publications

References 16 publications

Raman fingerprint of chromate, aluminate and ferrite spinels

Raman fingerprint of chromate, aluminate and ferrite spinels

Synthesis and characterisation of Ni0.25Co0.75Fe2O4 nanostructures

Optical properties and microstructure of Ni doped ZnAl2O4 nanopowders synthesized by sol–gel method

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