Chemical route to synthesis of mesoporous ZnO thin films and their liquefied petroleum gas sensor performance

Dattatray Dhawale, C. D. Lokhande

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

In the present work, we report base free chemical bath deposition (CBD) of mesoporous zinc oxide (ZnO) thin films from urea containing bath for liquefied petroleum gas (LPG) sensor application. Mesoporous morphology with average pore size ∼2 μm and wurtzite crystal structure are confirmed from scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis. The surface of ZnO is hydrophobic with water contact angle 128 ± 1°. Optical study reveals the presence of direct bad gap with energy 3.24 eV. The gas sensing study reveals the mesoporous ZnO is highly selective towards LPG as compared with CO2 and maximum LPG response of 52% is achieved upon the exposure of 3900 ppm LPG at 573 K as well as good reproducibility and short response/recovery times.

Original languageEnglish
Pages (from-to)10092-10097
Number of pages6
JournalJournal of Alloys and Compounds
Volume509
Issue number41
DOIs
Publication statusPublished - 13 Oct 2011
Externally publishedYes

Fingerprint

Zinc Oxide
Liquefied petroleum gas
Zinc oxide
Chemical sensors
Oxide films
Thin films
Urea
X ray diffraction analysis
Pore size
Contact angle
Crystal structure
Gases
Recovery
Scanning electron microscopy
Water

Keywords

  • CBD
  • LPG sensor
  • Mesoporous
  • Thin films
  • ZnO

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

Cite this

Chemical route to synthesis of mesoporous ZnO thin films and their liquefied petroleum gas sensor performance. / Dhawale, Dattatray; Lokhande, C. D.

In: Journal of Alloys and Compounds, Vol. 509, No. 41, 13.10.2011, p. 10092-10097.

Research output: Contribution to journalArticle

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