Design and fabrication of quick responsive and highly sensitive LPG sensor using ZnO/SnO2 heterostructured film

Highly efficient LPG sensor working at room temperature was developed using a simple and cost-effective route. For this purpose, ZnO/SnO2 heterostructure was synthesized using the hydrothermal route and thin films of the material were prepared. X-ray Diffraction revealed all the crystal parameters including grain size, texture coefficient, dislocation densities, surface area which are necessary for a sensor. Also, particle size, zeta potential, and conductivity were observed using nanozetasizer. Heterojunctions at the surface of the film were viewed by Scanning electron microscopy. An optical band-gap of ∼3.85 eV was measured using UV–vis absorption spectrum. Further, the film was used as room ambient sensor for different concentrations of LPG. Among them, the best sensor response and sensitivity of 276.51 and 3.78 respectively were obtained for 2.0 vol% of LPG whereas minimum response and recovery time of 10 s and 15 s were obtained for 0.5 vol% of LPG.

[1]  B. Yadav,et al.  Transient photodetection studies on 2D ZnO nanostructures prepared by simple organic-solvent assisted route , 2021 .

[2]  Utkarsh Kumar,et al.  The beauty inhabited inside the modified Graphene for moisture detection at different frequencies , 2020, Journal of Materials Science: Materials in Electronics.

[3]  D. E. Motaung,et al.  The effect of stabilized ZnO nanostructures green luminescence towards LPG sensing capabilities , 2020 .

[4]  R. Mane,et al.  Room temperature LPG sensing properties using spray pyrolysis deposited nano-crystalline CdO thin films , 2019 .

[5]  S. Annapoorni,et al.  Evolution and growth mechanism of hexagonal ZnO nanorods and their LPG sensing response at low operating temperature , 2019, Sensors and Actuators A: Physical.

[6]  H. Torun,et al.  Advances in designs and mechanisms of semiconducting metal oxide nanostructures for high-precision gas sensors operated at room temperature , 2019, Materials Horizons.

[7]  Elisabetta Comini,et al.  "Metal oxide -based heterostructures for gas sensors"- A review. , 2018, Analytica chimica acta.

[8]  K. Khojier,et al.  Fast and low concentration detection of liquefied petroleum gas by Au-activated ZnO sensor , 2018, Materials Research Bulletin.

[9]  G. Dzhardimalieva,et al.  Synthesis and characterization of nanostructured MnO2–CoO and its relevance as an opto-electronic humidity sensing device , 2018, RSC advances.

[10]  S. Sagadevan,et al.  Development, optimization and characterization of a two step sol–gel synthesis route for ZnO/SnO2 nanocomposite , 2018, Journal of Materials Science: Materials in Electronics.

[11]  S. Pawar,et al.  The n-Bi2S3/p-PbS heterojunction for room temperature LPG sensors , 2017 .

[12]  A. Ranjan,et al.  Detection of liquefied petroleum gas below lowest explosion limit (LEL) using nanostructured hexagonal strontium ferrite thin film , 2017 .

[13]  Khalid Mujasam Batoo,et al.  Solution based–spin cast processed LPG sensor at room temperature , 2017 .

[14]  A. Ranjan,et al.  Synthesis and characterization of perovskite barium titanate thin film and its application as LPG sensor , 2017 .

[15]  L. P. Purohit,et al.  Transparent conducting ZnO-CdO mixed oxide thin films grown by the sol-gel method. , 2017, Journal of colloid and interface science.

[16]  Trushar R. Patel,et al.  Dynamic light scattering: a practical guide and applications in biomedical sciences , 2016, Biophysical Reviews.

[17]  G. Dzhardimalieva,et al.  Fabrication of nanostructured yttria stabilized zirconia multilayered films and their optical humidity sensing capabilities based on transmission , 2016 .

[18]  B. Yadav,et al.  Synthesis, Characterization of Nickel Ferrite and Its Uses as Humidity and LPG Sensors , 2016, Journal of Inorganic and Organometallic Polymers and Materials.

[19]  Zhongchang Wang,et al.  Quasi-one-dimensional metal-oxide-based heterostructural gas-sensing materials: A review , 2015 .

[20]  M. Deepa,et al.  VO₂ nanorods for efficient performance in thermal fluids and sensors. , 2015, Nanoscale.

[21]  K. V. Rao,et al.  X-Ray Analysis by Williamson-Hall and Size-Strain Plot Methods of ZnO Nanoparticles with Fuel Variation , 2014 .

[22]  R. Mane,et al.  Hematite nanostructures: Morphology-mediated liquefied petroleum gas sensors , 2013 .

[23]  D. He,et al.  Synthesis, characterization, and lithium-storage of ZnO–SnO2 hierarchical architectures , 2013 .

[24]  Guangwei She,et al.  Catalyst-free synthesis of single crystalline ZnO nanonails with ultra-thin caps , 2012 .

[25]  B. Yadav,et al.  Nanocrystalline SnO2–TiO2 thin film deposited on base of equilateral prism as an opto-electronic humidity sensor , 2012 .

[26]  Umakant M. Patil,et al.  Morphology evolution of ZnO thin films from aqueous solutions and their application to liquefied petroleum gas (LPG) sensor , 2012 .

[27]  J. Gan,et al.  Electronic structures and excitonic transitions in nanocrystalline iron-doped tin dioxide diluted magnetic semiconductor films: an optical spectroscopic study. , 2011, Physical chemistry chemical physics : PCCP.

[28]  C. H. Bhosale,et al.  Sensing properties of sprayed antimony doped tin oxide thin films: Solution molarity , 2011 .

[29]  Gurdeep Singh,et al.  Analysis of thickness dependence on the electrical properties of tin dioxide films in the presence of LPG gas , 2010 .

[30]  Rashmi,et al.  Study of structural and microstructural properties of SnO2 powder for LPG and CNG gas sensors , 2006 .

[31]  A. R. Phani.  X-ray photoelectron spectroscopy studies on Pd doped SnO2 liquid petroleum gas sensor , 1997 .

[32]  B. Sowmya,et al.  A review on metal-oxide based p-n and n-n heterostructured nano-materials for gas sensing applications , 2021 .

[33]  Debojyoti Nath,et al.  X-ray diffraction analysis by Williamson-Hall, Halder-Wagner and size-strain plot methods of CdSe nanoparticles- a comparative study , 2020 .

[34]  B. Thomas,et al.  Microwave-enhanced pyrolysis grown nanostructured SnO2 thin films for near room temperature LPG detection and the impedance analysis , 2020 .