Journal ArticleDOI
Sensing of LPG with nanostructured zinc oxide thin films grown by spray pyrolysis technique
Reads0
Chats0
TLDR
In this paper, a spray pyrolysis technique using Zn(NO3)2·6H2O as the precursor solution was used to obtain polycrystalline zinc oxide, possessing hexagonal wurtzite crystal structure and nanocrystallite with grain size of approximately 30-35nm.Abstract:
Nanostructured zinc oxide thin films were prepared by spray pyrolysis technique using Zn(NO3)2·6H2O as the precursor solution. The resulting films were investigated by X-ray diffraction and scanning electron microscopy to know crystal structure, size of crystallites and surface morphology. The films have been found to be polycrystalline zinc oxide, possessing hexagonal wurtzite crystal structure and nanocrystallite with grain size of approximately 30–35 nm. The LPG sensing performance of the films has been investigated at various concentrations of LPG in air at operating temperatures varying from 225 to 400 °C. At 325 °C the maximum responses of 46.3% and 48.9% have been observed, respectively, for concentrations of 0.8 and 1 vol% of LPG in air (1 vol% of LPG in air corresponds to 50% LEL of LPG in air). The recovery time has been found to be less than the response time for all concentrations of LPG. A possible reaction mechanism of LPG sensing has been proposed.read more
Citations
More filters
Journal ArticleDOI
On the high response towards TEA of gas sensors based on Ag-loaded 3D porous ZnO microspheres
TL;DR: In this article, an ultra-high response and fast response/recovery triethylamine (TEA) gas sensor is fabricated by growing Ag nanoparticles on the surface of hierarchical 3D porous ZnO microspheres (Ag-ZnO) via a green and facile precipitation method.
Journal ArticleDOI
Alcohol-sensing characteristics of spray deposited ZnO nano-particle thin films
C.S. Prajapati,P. P. Sahay +1 more
TL;DR: In this paper, X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses confirm that the films are polycrystalline zinc oxide, possessing hexagonal wurtzite structure with crystallite size ∼25nm.
Journal ArticleDOI
Influence of tin doping onto structural, morphological, optoelectronic and impedance properties of sprayed ZnO thin films
TL;DR: In this article, the influence of tin doping on photoelectrochemical, structural, morphological, optical, electrical and impedance properties of zinc oxide thin films has been investigated using X-ray photoelectron spectroscopy.
Journal ArticleDOI
Structural, optical and methanol sensing properties of sprayed In2O3 nanoparticle thin films
TL;DR: In this paper, a polycrystalline In 2 O 3, possessing cubic structure with lattice parameters, was grown on cleaned glass substrates by the chemical spray pyrolysis technique using the precursor solution of indium nitrate (In (NO 3 ) 3 ).
Journal ArticleDOI
Influence of In doping on the structural, optical and acetone sensing properties of ZnO nanoparticulate thin films
C.S. Prajapati,P. P. Sahay +1 more
TL;DR: In this paper, X-ray diffraction results showed that all the films are polycrystalline zinc oxide having hexagonal wurtzite structure and upon doping, the films exhibit reduced crystallinity as compared with the undoped film.
References
More filters
Book
Elements of X-ray diffraction
TL;DR: In this article, the authors present a chemical analysis of X-ray diffraction by Xray Spectrometry and phase-diagram Determination of single crystal structures and phase diagrams.
Book
X-ray diffraction procedures for polycrystalline and amorphous materials
Harold P. Klug,Leroy Alexander +1 more
Journal ArticleDOI
Influence of postdeposition annealing on the structural and optical properties of sputtered zinc oxide film
Vinay Gupta,Abhai Mansingh +1 more
TL;DR: The influence of postdeposition annealing on the structural and optical properties of rf sputtered insulating zinc oxide films has been investigated in this article, where the optical dispersion data have been fitted to (1) a single oscillator model and (2) the Pikhtin-Yas'kov model.
Journal ArticleDOI
Sensing characteristics of tin-doped ZnO thin films as NO2 gas sensor
TL;DR: In this paper, the influence of variation of tin concentration in the chemical bath and the RPP temperature on NO 2 sensitivity of thin film sensor elements was investigated, and the experimental results showed that tin doping of zinc oxide thin films improved the sensor element sensitivity to 1.5ppm NO 2 in air and downshift the operating temperature.