Fabrication, characterization and investigation of gas sensing properties of MoO3 thin films

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

Ghaleghafi Elahe; RAHMANI MOHAMMAD BAGHER

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Iranian Journal of Crystallography and Mineralogy Year:2019 | Volume:27 | Issue:2 Page(s): 475-486

Download Full-Text

Persian Verion

View:

406

Download:

Cites:

Information Journal Paper

Title

Fabrication, characterization and investigation of gas sensing properties of MoO3 thin films

Author(s)

Ghaleghafi Elahe | RAHMANI MOHAMMAD BAGHER | Issue Writer Certificate

Keywords

molybdenum trioxideQ1

spray pyrolysisQ1

structural and optical propertiesQ1

electron microscopeQ3

gas sensorQ1

Abstract

In this research, molybdenum oxide (α-MoO3) thin films were coated on glass substrates using spray pyrolysis technique. 0. 05 M ammonium heptamolybdate tetrahydrate was used as precursor and deionized water as solvent. The effects of carrier gas pressure, during the spraying of the solution, on the structural, optical, morphological and gas sensing properties of thin films were studied. X-ray diffraction (XRD) pattern analysis showed preferred growth at (020) peak direction and the formation of alpha phase of molybdenum oxide. The most intensive peaks were observed in the XRD pattern of the sample prepared under the carrier gas pressure of 2 bar, which indicates better crystallization of the sample. In addition, Raman spectrum of this sample confirmed the XRD results. UV-Vis spectroscopy results showed that the sample prepared under the carrier gas pressure of 1. 8 bar has the highest optical absorption and the lowest band gap (~ 3. 48 eV). Scanning electron microscope (SEM) images showed the layer structure of samples. Moreover, gas sensor devices based on the prepared samples at different carrier gas pressures, were fabricated and their sensing performances were investigated. Results showed that, the work temperature (i. e. the lowest temperature with the highest gas response at the specified ethanol vapor concentration of 200 ppm) was 200 º C and belongs to the sample prepared under the carrier gas pressure of 1. 8 bar. Also, studying the effect of ethanol vapor concentration extent for this sample showed the increasing of sensitivity percent from 1. 42 to 15. 62 % for 100 to 1000 ppm ethanol vapor, respectively.

Cites

No record.

References

No record.

Cite

APA: Copy

Ghaleghafi, Elahe, & RAHMANI, MOHAMMAD BAGHER. (2019). Fabrication, characterization and investigation of gas sensing properties of MoO3 thin films. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 27(2 ), 475-486. SID. https://sid.ir/paper/3816/en

Vancouver: Copy

Ghaleghafi Elahe, RAHMANI MOHAMMAD BAGHER. Fabrication, characterization and investigation of gas sensing properties of MoO3 thin films. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2019;27(2 ):475-486. Available from: https://sid.ir/paper/3816/en

IEEE: Copy

Elahe Ghaleghafi, and MOHAMMAD BAGHER RAHMANI, “Fabrication, characterization and investigation of gas sensing properties of MoO3 thin films,” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 27, no. 2 , pp. 475–486, 2019, [Online]. Available: https://sid.ir/paper/3816/en

Related Journal Papers