Gas sensing properties of magnesium ferrite prepared by co-precipitation method

Hankare, P.P.; Jadhav, S. D.; Sankpal, U.B.; Patil, R. S.; Sasikala, R.; Mulla, I.S.

doi:10.1016/j.jallcom.2009.08.103

Cited by 81 publications

(34 citation statements)

References 16 publications

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“…Recently, Sivakumar et al [31] synthesized nano-structured MgFe 2 O 4 spinel with different grain sizes ranging between 19 and 72 nm using ceramic method followed by high-energy ball milling. Hankare et al [32] synthesized magnesium ferrite by co-precipitation method with grain size of 40 nm. Sasaki et al [33] prepared magnesioferrite nano-particles by hydrothermal synthesis in supercritical water with particle size of about 20 nm and saturation magnetization of 20 emu/g.…”

Section: Introductionmentioning

confidence: 99%

Novel preparation and properties of magnesioferrite nanoparticles

Deraz

Alarifi

2012

Journal of Analytical and Applied Pyrolysis

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Section: Introductionmentioning

confidence: 99%

Novel preparation and properties of magnesioferrite nanoparticles

Deraz

Alarifi

2012

Journal of Analytical and Applied Pyrolysis

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“…In the range of 1000-400cm -1 , a typical metal-oxygen absorption band for the spinel structure of the ferrite at ~560 cm -1 was observed in the FT-IR spectra of all calcined MgFe2O4 samples. This band strongly suggests the intrinsic stretching vibrations of the metal (Fe ↔ O) at the tetrahedral site [3] Fig.6 depicts I-V characteristics of nanoparticles Bacillus subtilis with MgFe2O4 biofilms. From the symmetrical I-V characteristics it was clear that the silver contacts on the bio-films were ohmic in nature.…”

Section: Ft-ir Studiedmentioning

confidence: 98%

“…Spinal of the type M 2+ M2 3+ O4 attract the research interest because of their versatile practical application [1][2]. Spinel ferrites with the general formula AFe2O4 (A = Mn, Co, Ni, Mg, or Zn) are very important magnetic materials because of their interesting magnetic and electrical properties with chemical as well as thermal stabilities [3]. Magnesium ferrite (MgFe2O4) is one of the most important ferrites.…”

Section: Introductionmentioning

confidence: 99%

Microbial Gas Sensing Property of Bacillus Subtilis With Mixed Metal Catalyst Mgfe2o4

VV¹,

SV²

2011

Int J of Micr Res

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Abstract-Semiconductive nanoparticles of bacteria as Bacillus subtilis with catalyst MgFe2O4 biofilm was synthesized by using solution combustion technique. The process was convenient, environment friendly and efficient method. Materials were characterized by TG/DTA, XRD, and TEM. Thick biofilm of Bacillus subtilis MgFe2O4 was measured by exposing it to reducing economical gases. It was found that the Bacillus subtilis was sensors exhibited various sensing responses to these gases at different operating temperature. The sensor exhibited a fast response and a good recovery. The biofilm can be used as a new type of gas-sensing material which has a high sensitivity and good selectivity to various gases at low ppm.

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“…O último método a citar é o que utiliza a coprecipitação (CHEN et al 1999;HANKARE et al 2009a;HANKARE et al 2009b;HOQUE et al 2011) e consiste na mistura de soluções de Fe 2+ e Mg 2+ , em proporção molar 2:1 respectivamente, na presença de uma base forte (NaOH ou KOH), com aquecimento a aproximadamente 100ºC. O precipitado formado é lavado para retirada do excesso de sais, secados em estufa e aquecidos de 400 a 900ºC por 3 horas.…”

Section: Fonte: Costa E Bigham (2009)unclassified

Síntese de magnesioferrita a partir de magnetitas magnesianas

Anami

Costa

2013

Semina: Tech. Ex.

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ResumoMagnesioferrita é um importante mineral devido a sua utilização em diferentes campos da ciência e pelo fato de que no solo, pela ação do intemperismo, pode ser fonte de nutrientes essenciais ao desenvolvimento das plantas. A sua utilização na forma pura ou associada a outros minerais só é possível através da síntese em laboratório. Este trabalho teve por objetivo sintetizar magnesioferrita e hematita a partir de magnetita-magnesiana pelo método de co-precipitação. A metodologia utilizada é uma adaptação do método de síntese de magnetita pura, substituindo parcialmente os sais solúveis de ferro por sais solúveis de magnésio na proporção de 30,0 mol% de Fe por Mg. Para caracterização dos materiais foram utilizadas as técnicas de difração de raios-x, análise química total e susceptibilidade magnética por unidade de massa. Os resultados mostraram que além de magnetita-magnesiana foi sintetizada uma inédita muskoxita, que após o tratamento térmico foi convertida a magnesioferrita e hematita na proporção de 93,1% e 6,9% respectivamente. A substituição isomórfica do Fe por Mg aumentou a estabilidade térmica do mineral ferrimagnético sintetizado. Palavras-chave: Óxidos de ferro. Ferrimagnetismo. Susceptibilidade magnética. Maghemita. AbstractMagnesioferrite is an important mineral due to its use in different scientific fields and by the fact that the soil through the action of weathering, can be a source of nutrients essential for plant development by the fact that in the soil. Its use in pure form or associated with other minerals is only possible through the synthesis in laboratory conditions. This study aimed to synthesize magnesioferrite and hematite from magnesian-magnetite by a co-precipitation procedure. The methodology used is an adaptation of the method of synthesis of pure magnetite, partially replacing the soluble salts of iron with soluble magnesium salts in the proportion of 30.0 mol% of Fe for Mg. The characterization of the synthetic minerals used x-rays diffraction, total chemical analysis and mass specific magnetic susceptibility. The results showed that besides the magnesian-magnetite an unprecedented muskoxita was synthesized, which upon annealing was converted to magnesioferrite and hematite and in the proportion of 93.1% and 6.9% respectively. The isomorphous substitution of Fe for Mg enhanced the thermal stability of the ferrimagnetic mineral synthesized.

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Gas sensing properties of magnesium ferrite prepared by co-precipitation method

Cited by 81 publications

References 16 publications

Novel preparation and properties of magnesioferrite nanoparticles

Novel preparation and properties of magnesioferrite nanoparticles

Microbial Gas Sensing Property of Bacillus Subtilis With Mixed Metal Catalyst Mgfe2o4

Síntese de magnesioferrita a partir de magnetitas magnesianas

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