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Facile Synthesis of Nano-Diced SnO2–ZnO Composite by Chemical Route for Gas Sensor Application

  • K. S. Pakhare
  • B. M. SargarEmail author
  • S. S. Potdar
  • A. K. Sharma
  • U. M. Patil
Article
  • 4 Downloads

Abstract

The simple chemical bath deposition (CBD) method is used to synthesize SnO2–ZnO nanocomposite at room temperature. Formation of SnO2–ZnO nancomposite is confirmed by the x-ray diffraction (XRD) pattern of annealed films. Scanning electron microscopy (SEM) micrographs of nanocomposite SnO2–ZnO depict that morphological change from nanocubes to manifold hexagonal nanorods with an increase in ZnO content in a composite sample. Also, pure SnO2 sample exhibits interconnected nanospheres. Electron dispersive spectroscopy (EDS) is employed to confirm elemental compositions in composite films. SnO2–ZnO samples were applied as a sensor for different test gases, namely liquified petroleum gas (LPG), ethanol, ammonia (NH3), and hydrogen sulfide (H2S). The maximum response of 59.67% is observed for ethanol at an operating temperature of 275°C and 24 ppm gas concentration. Also, a composite sensor shows a quick response in comparison with a bare sensor. This superior performance of composite over pure sensor may be attributed to a n–n heterojunction at intergrain boundaries. The SnO2–ZnO sensor is found to be selective towards ethanol even at lower gas concentrations.

Keywords

Chemical bath deposition method XRD SEM gas sensor 

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.DIST-FIST Sponsored Material Research Laboratory, Department of ChemistryJaysingpur College, JaysingpurKolhapurxIndia
  2. 2.Anandibai Raorane ArtsCommerce and Science CollegeVaibhavwadi, SindhudurgIndia
  3. 3.Department of PhysicsSanjivan Engineering and Technology InstitutePanhala, KolhapurIndia
  4. 4.School of PhysicsShree Mata Vaishno Devi UniversityKatraIndia
  5. 5.Department of Physics, Center for Interdisciplinary Research StudyD.Y. Patil UniversityKolhapurIndia

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