Nanonails structured ferric oxide thick film as room temperature liquefied petroleum gas (LPG) sensor

Yadav, B. C.; Singh, Satyendra; Yadav, Anurag

doi:10.1016/j.apsusc.2010.09.035

Cited by 74 publications

(22 citation statements)

References 34 publications

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“…Since dimensions remain the same during small temperature variations, therefore, the equation can be simplified for resistance as      [27] By measuring the slope of Arrhenius plot of a linear zone, we have calculated the activation energy of nanostructured ZnO. Figure 9 shows the variation of lnR as a function of inverse temperature (Arrhenius plot).…”

Section: Activation Energy By Thermal Resistance Methodsmentioning

confidence: 99%

Investigation on Temperature Sensing of Nanostructured Zinc Oxide Synthesized via Oxalate Route

Srivastava¹

2012

JST

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A detailed study is reported of the synthesis and characterization of n-type ZnO nanomaterial and its application as temperature sensor. The ZnO nanomaterial has been synthesized through pyrolysis of the oxalate produced by a conventional precipitation method. It is synthesized by flash heating the oxalate at 450˚C for 15 min. Pellet of this material was prepared and used as a sensing element. The variations in resistance of sensing pellet at different temperatures were recorded. The relative resistance was decreased linearly with increasing temperatures over the range, 120˚C -260˚C. The activation energy of ZnO calculated from Arrhenius plot was found 1.12 eV. Temperature response in terms of the relative variation, ∆R, of sensor resistance to a given temperature was measured. Scanning electron micrograph of the sensing element has been studied. Pellet of the ZnO is comprised of nanorods of varying diameters and different lengths. Diameter of ZnO nanorods varies from 75 to 300 nm. X-ray diffraction pattern of the sensing element reveal their nano-crystalline nature. Optical characterization of the sensing material was carried out by UV-visible spectrophotometer. By UV-Vis spectra, the estimated value of band gap of ZnO was found 4.7 eV.

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Section: Activation Energy By Thermal Resistance Methodsmentioning

confidence: 99%

Investigation on Temperature Sensing of Nanostructured Zinc Oxide Synthesized via Oxalate Route

Srivastava¹

2012

JST

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“…Yadav et al [21], Dghoughi et al [22], Pejova and coworkers [23], Ismail etal. [24] determined the band gap from the relation between the absorption coefficient (α) and the energy of incident light hν [24]:…”

Section: Volume 45mentioning

confidence: 99%

Fe<sub>2</sub>O<sub>3</sub> Thin Films Prepared by Spray Pyrolysis Technique and Study the Annealing on its Optical Properties

Abass

2015

ILCPA

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Fe 2 O 3 thin films that doped by NiO were obtained on glass substrates by the chemical spray pyrolysis technique, and annealed at 450 ºC and 500 ºC. The effect of annealing on optical properties was studied by recording the absorbance spectra using UV-Visible spectrophotometer. The refractive index decreases with increasing annealing temperature, such as an optical band gap that decreases from 2.68 eV before annealing to 2.58 eV after annealing of 500 ºC. Absorption coefficient and extinction coefficient increase with increasing annealing temperature.

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“…n-type semiconductor such as SnO 2 has been used for the detection of inflammable and toxic gases such as NO x , CH 4 , or CO [17][18][19][20][21][22][23][24]. In more recent research the interest is shifted to some other promising metal oxide such as ZnO, Fe 2 O 3 , SnO 2, In 2 O 3 and TiO 2 with interesting properties as a gas sensing material [25][26][27][28][29]. Among these TiO 2 is a promising material for gas sensor.…”

Section: Introductionmentioning

confidence: 98%

Fabrication and characterization of nanostructured (Sn–Ti)O2 pellets and films for liquefied petroleum gas sensing

Yadav

Verma

Shukla

et al. 2016

J Mater Sci: Mater Electron

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Present paper reports the synthesis of nanostructured (Sn-Ti)O 2 via physicochemical method, its characterization and performance as liquefied petroleum gas (LPG) sensor. The synthesized material was characterized using XRD that confirmed the formation of (SnTi)O 2 nanocomposite. Minimum crystallite size was found as 7 nm. The material was also investigated through SEM, DSC, FTIR, PL and UV-Vis spectrophotometer. Further, the pellet, thick and thin films were fabricated for the sensing analysis. Pellets (9 mm diameter, 4 mm thickness) of (Sn-Ti)O 2 nanocomposite were made by hydraulic pressing machine by applying uniaxial pressure of 616 MPa, thick films (thickness *2 lm) were made by screen printing technique and thin films were prepared using a Photo resist spinner unit. Further at room temperature, the pellet and films were exposed to LPG in a gas chamber under controlled conditions at room temperature and variations in resistance with the concentrations of LPG were observed. The maximum value of sensitivity of solid state pellet, thick and thin films based sensors were found 7, 9 and 39 for 5 vol% of LPG, respectively. Sensing characteristics were found to be reproducible, after 6 months of their fabrication, indicating the stability of the sensors.

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Nanonails structured ferric oxide thick film as room temperature liquefied petroleum gas (LPG) sensor

Cited by 74 publications

References 34 publications

Investigation on Temperature Sensing of Nanostructured Zinc Oxide Synthesized via Oxalate Route

Investigation on Temperature Sensing of Nanostructured Zinc Oxide Synthesized via Oxalate Route

Fe<sub>2</sub>O<sub>3</sub> Thin Films Prepared by Spray Pyrolysis Technique and Study the Annealing on its Optical Properties

Fabrication and characterization of nanostructured (Sn–Ti)O2 pellets and films for liquefied petroleum gas sensing

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