Studies on the preparation and ethanol gas sensing properties of spinel Zn0.6Mn0.4Fe2O4 nanomaterials

Kadu, A. V.; Jagtap, S.V.; Chaudhari, G. N.

doi:10.1016/j.cap.2009.02.001

Cited by 79 publications

(22 citation statements)

References 26 publications

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“…Owing to their developed specific surface and high surface energy they can be used as catalysts [1][2][3] or gas sensors [4]. Nanoferrites with belowcritical grain size at room temperature are characterized by superparamagnetism, low Curie temperature, and high magnetic flux density.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of manganese–zinc ferrite obtained by thermal decomposition from organic precursors

Szczygieł

Winiarska

2013

J Therm Anal Calorim

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Mn-Zn ferrites were obtained by the sol-gel autocombustion methods. The effect of the precursor used in the sol-gel autocombustion synthesis on the ferrite's microstructure was examined. The as-obtained powders were characterized by XRD, FTIR, SEM, and TG/DTA. All ferrite powders obtained from different organic precursors, after gel autocombustion, were pure spinel phase, without secondary phases. The average crystallite size, estimated from Scherrer equation, was the smallest for ferrite obtained from a mixture of fuels/precursors (citric acid and EDTA). This ferrite powder has sponge-like microstructure with large pores, but it is less agglomerated than the material obtained from glycine as the fuel.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of manganese–zinc ferrite obtained by thermal decomposition from organic precursors

Szczygieł

Winiarska

2013

J Therm Anal Calorim

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“…The higher working temperature of HT zinc ferrite nanoparticles is probably due to its smaller specific surface area (Table 2) and lower surface activity, which results in weaker interaction between the test gas and the material surface [3]. Thus, it needs more excitation temperature for the sensing material to show sufficient response to the test gas [26]. Relationship between the sensitivity and the concentration of the test gas is determined at the optimum working temperature, that is, at 250°C for 'as synthesized' and at 300°C for HT zinc ferrite (Fig.…”

Section: Resultsmentioning

confidence: 97%

“…It can be seen that sensitivity tends to saturate with increase in concentration of ethanol gas in both the sensing materials. The response of a sensor depends on removal of adsorbed oxygen species in reaction with a testing gas and generation of electrons [26]. For small concentrations of gas, there is a lower surface reaction due to lower coverage of gas molecules on the grain surface.…”

Section: Resultsmentioning

confidence: 99%

Influence of Temperature on Reducing Gas Sensing Performance of Nanocrystalline Zinc Ferrite

Tyagi

Batra

Paul

2015

Trans Indian Inst Met

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Pure phase, zinc ferrite (ZnFe 2 O 4 ) nanoparticles were synthesized at lower temperature (80°C) by auto combustion synthesis method. The resulting 'as synthesized' powder was heat treated (HT) at 560°C for 2 h in air atmosphere. As-synthesized particles had sizes *10 nm with spherical shape. Further, these spherically shaped nanoparticles tended to change their morphology to hexagonal plate shape with increasing HT temperature. The band gap of the 'as synthesized' and HT zinc ferite, as determined by using UVVis spectroscopy were found to be 1.92 and 1.86 eV respectively. Gas responses of the ZnFe 2 O 4 nanoparticles were measured by exposing them to ethanol gas vapors. It was found that the zinc ferrite nanoparticles exhibited various sensing responses to ethanol gas at different operating temperature. The best sensitivity was observed at low temperature for 'as synthesized' ferrite nanoparticles than HT zinc ferrite nanoparticles. Sensing material that had smaller particle size and larger specific surface area was observed to have larger gas sensitivity and vice-versa.

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“…(1), the average grain size of ZnFe 1.97 Eu 0.03 O 4 was 12, 14, 16, 17 nm corresponding to the sintering temperature of 400, 550, 650 and 750°C, respectively. Obviously, the grain sizes of the samples increased step by step with the increase of the sintering temperature [29].…”

Section: Resultsmentioning

confidence: 99%

Effects of annealing temperature on the magnetic properties of ZnFe1.97Eu0.03O4 nanoparticles

Yang

Han

Liu

et al. 2015

J Mater Sci: Mater Electron

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The ZnFe 1.97 Eu 0.03 O 4 nanoparticles were prepared with sol-gel method. The effects of sintering temperature on the structural, morphological and magnetic properties were investigated in detail. The results revealed that the ZnFe 1.97 Eu 0.03 O 4 NPs exhibited weak ferromagnetic properties due to the formation of defects in ZnFe 2 O 4 caused by Eu 3? doping. Moreover, the increased sintering temperature not only enlarged the grain size but also decreased the magnetization of ZnFe 1.97 Eu 0.03 O 4 NPs due to the decrease of defects in the crystal lattices.

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Studies on the preparation and ethanol gas sensing properties of spinel Zn0.6Mn0.4Fe2O4 nanomaterials

Cited by 79 publications

References 26 publications

Synthesis and characterization of manganese–zinc ferrite obtained by thermal decomposition from organic precursors

Synthesis and characterization of manganese–zinc ferrite obtained by thermal decomposition from organic precursors

Influence of Temperature on Reducing Gas Sensing Performance of Nanocrystalline Zinc Ferrite

Effects of annealing temperature on the magnetic properties of ZnFe1.97Eu0.03O4 nanoparticles

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