Sol–gel synthesized semiconducting LaCo0.8Fe0.2O3-based powder for thick film NH3 gas sensor

Chaudhari, G. N.; Jagtap, S.V.; Gedam, N.N.; Pawar, M. J.; Sangawar, Vijaya S.

doi:10.1016/j.talanta.2009.01.030

Cited by 33 publications

(12 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1 Figure 2 shows the TG curve of (NH 4 6 ]. Further heating caused an abrupt weight loss at around 573 K due to the collapse of the cyanide groups to afford two near plateaus at around 603 K and in the range of 773 to 823 K. The final plateau was observed from 898 K to 1273 K, whose weight loss percentage (45.3 45.7%) agreed with the calculated value (46.05%) for affording LaFeO 3 . The characterization of the decomposition products at respective temperatures was carried out by IR spectra and XRD patterns.…”

supporting

confidence: 74%

Preparation of perovskite-type oxide, LaFeO3, by low-temperature decomposition of heteronuclear coordination polymer, (NH4)La[Fe(CN)6] 4.5H2O

Satô

Itoh

Yamaguchi

et al. 2010

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

Thermal decomposition of the coordination polymer, (NH 4 (CN) 6 ], at around 523 K. Further heating gave rise to an abrupt collapse of cyanide groups at around 573 K, followed by the initial formation of the perovskite-type oxide, LaFeO 3 , at 603 K and the completion of the decomposition to produce LaFeO 3 at around 898 K. Perovskite-type oxides comprising lanthanide (f-elements) and d-transition metal ions, and related mixed oxides have been extensively studied for their practical uses as electrode materials in the solid oxide fuel cells, 1),2) gas sensors, 3),4) catalysts,oxygen permeable membranes 10) and platinum-free alkaline water electrolysis cells. 11) For preparing such perovskite-type oxides, solid state reaction and co-precipitation methods have been widely adopted. In the solid state reaction, metal oxides or metal carbonates as the components are mechanically mixed and calcined at high temperature (usually above 1273 K). In this reaction, the product is inevitably contaminated by the respective metal oxides of the component metals, and calcining and grinding are, in most cases, repeated for diminishing such contaminants. In the co-precipitation method, a contrivance is often needed for preparing homogeneous precipitates, because each component metal ion has its characteristic precipitation kinetics. In order to overcome these problems, various preparation methods have been developed. Among these, citrate process 7),12) and polymerizable complex method 13)15) are known to be effective for preparing nanoparticles of perovskite-type oxide single phase at relatively low temperature. Besides these methods, we have proposed the complex decomposition method which is based on thermal decomposition of heteronuclear complexes or coordination polymers isolated in advance. ¹1 at a heating rate of 10 K·min ¹1 from room temperature to 1273 K. FT-IR spectra were measured at room temperature with a JASCO V-4100 spectrometer. Powder X-ray diffraction (XRD) analyses were carried out at room temperature

show abstract

supporting

confidence: 74%

Preparation of perovskite-type oxide, LaFeO3, by low-temperature decomposition of heteronuclear coordination polymer, (NH4)La[Fe(CN)6] 4.5H2O

Satô

Itoh

Yamaguchi

et al. 2010

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

show abstract

“…[1,2]. During the past years, a lot of reliable and sensitive sensors detecting NH 3 have been developed; however, many of them need to operate at high temperature ranging from 150 to 500 • C [3][4][5][6][7][8][9][10][11], which shortens sensor life and increases power consumption. There are also some conducting polymer based gas sensors operating at low temperature, such as polyaniline (PANI), poly(3,4-ethylenedioxythiophene) (PEDOT) and PPy gas sensors.…”

Section: Introductionmentioning

confidence: 99%

Gas sensing properties of surface acoustic wave NH3 gas sensor based on Pt doped polypyrrole sensitive film

Chen

Liang

et al. 2013

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

“…Perovskite-type oxides, which are functional inorganic materials, have a wide range of applications and various interesting properties, including ion conductivity [6] and catalytic activity [7]. The perovskite-type oxide is also used as a good sensor material, and has displayed sensing properties toward various harmful gases, such as NO X [8], VOC [9], NH 3 [10], CO [11] and hydrocarbons [12].…”

Section: Introductionmentioning

confidence: 99%

Improvement of Sensing Performance of Impedancemetric C2H2 Sensor Using SmFeO3 Thin-Films Prepared by a Polymer Precursor Method

Tasaki

Takase

2019

Sensors

View full text Add to dashboard Cite

A sensitive an impedancemetric acetylene (C2H2) gas sensor device could be fabricated by using perovskite-type SmFeO3 thin-film as a sensor material. The uniform SmFeO3 thin-films were prepared by spin-coating and focusing on the effects of polymer precursor solutions. The prepared precursors and thin-films were characterized by means of thermal analysis,　Fourier-transform infrared spectroscopy, ultraviolet–visible spectroscopy, X-ray diffraction analysis, scanning electron microscopy and X-ray photoelectron spectroscopy . It was found that particle growth and increase in homogeneity of the prepared thin-film could be accelerated by the addition of acetyl acetone (AcAc) as a coordination agent in the polymer precursor solution. Moreover, the highly crystallized thin-film-based sensor showed good response properties and stabilities to a low C2H2 concentration between 0.5 and 2.0 ppm.

show abstract

Sol–gel synthesized semiconducting LaCo0.8Fe0.2O3-based powder for thick film NH3 gas sensor

Cited by 33 publications

References 22 publications

Preparation of perovskite-type oxide, LaFeO3, by low-temperature decomposition of heteronuclear coordination polymer, (NH4)La[Fe(CN)6] 4.5H2O

Preparation of perovskite-type oxide, LaFeO3, by low-temperature decomposition of heteronuclear coordination polymer, (NH4)La[Fe(CN)6] 4.5H2O

Gas sensing properties of surface acoustic wave NH3 gas sensor based on Pt doped polypyrrole sensitive film

Improvement of Sensing Performance of Impedancemetric C2H2 Sensor Using SmFeO3 Thin-Films Prepared by a Polymer Precursor Method

Contact Info

Product

Resources

About