pp 1–4 | Cite as

Hydrothermal Synthesis of In2O3 :Ag Nanostructures for NO2 Gas Sensor

  • Raad S. Sabry
  • Ibrahim R. Agool
  • Asaad M. AbbasEmail author
Original Paper


In this work, Ag doped In2O3 nanostructure materials were successfully synthesis using a simple hydrothermal process with different Ag concentration (3,6,9)%. The structural properties and morphology of the obtained nanostructure film are characterized by X-ray diffraction and field emission scanning electron microscopy (FE-SEM). The structural analysis shows a highly crystalline of indium oxide with a cubic phase and the crystallite size decreased with the increasing of doping concentration. The current–voltage results from devices indicate that In2O3 film with 9% Ag concentration has better conduction film. Gas sensing performance was studied for NO2 gas with different concentration (50,100,150) ppm at operating temperature 100 °C. The maximum sensitivity (S = 79 %) was found at doping concentration 9% Ag.


Nanostructured In2O3 Hydrothermal Gas sensing 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.



The authors would like to acknowledge the support from the staff of material Laboratory in physics department al Mustansiriyah University.


  1. 1.
    Comini E, Baratto C, Faglia G, Ferroni M, Vomiero A, Sberveglieri G (2009) Quasi-one dimensional metal oxide semiconductors: preparation, characterization and application as chemical sensors. Prog Mater Sci 54:1–67CrossRefGoogle Scholar
  2. 2.
    Dong Q, Su H, Zhang D, Zhang F (2006) Fabrication and gas sensitivity of SnO2 hierarchical films with interwoven tubular conformation by a biotemplate directed sol–gel technique. Nanotechnology 17:3968–3972CrossRefGoogle Scholar
  3. 3.
    Liu X, Zhou L, Yi R, Zhang N, Shi R, Li Y, Gao G, Qiu G (2008) Single-crystalline indium hydroxide and indium oxide microcubes: synthesis and characterization. J Phys Chem 15:134Google Scholar
  4. 4.
    Thong LV, Hoa ND, Le DTT, Viet DT, Tam PD, Le A-T, Hieu NV (2010) On-chip fabrication of SnO2-nanowire gas sensor: the effect of growth time on sensor performance. Sens Actuators B Chem 146:361–367CrossRefGoogle Scholar
  5. 5.
    John Bosco Balaguru R (2009) Mimic of a gas sensor, metal oxide gas sensing mechanism, factors influencing the sensor performance and role of nanomaterials based gas sensors. School of Electrical & Electronics Engineering SASTRA UniversityGoogle Scholar
  6. 6.
    Gaoa L, Chengb Z, Xiangb Q, Zhangb Y, Xua J (2015) Porous corundum-type In2 O 3 nanosheets: synthesis and NO2 sensing properties. Sensors Actuators B 208:436–443CrossRefGoogle Scholar
  7. 7.
    Cheng Z, Song L, Ren X, Zheng Q, Xu J (2013) Novel lotus root slice-like self-assembled In2 O 3 microspheres: synthesis and NO2-sensing properties. Sensors Actuators B 176:258–263CrossRefGoogle Scholar
  8. 8.
    Cheng1 G, Stern E, Guthrie S (2006) Indium oxide nanostructures. Appl Phys A 85:233–240CrossRefGoogle Scholar
  9. 9.
    Cheng ZX, Dong XB, Pan QY, Zhang JC, Dong XW (2006) Preparation and characterization of In2 O 3 nanorods. Mater Lett 60:3137–3140CrossRefGoogle Scholar
  10. 10.
    Wang CY, Cimalla V, Romanus H, Kups T, Ecke G, Stauden T, Ali M, Lebedev V, Pezoldt J, Ambacher O (2006) Phase selective growth and properties of rhombohedral and cubic indium oxide. Appl Phys Lett 89:11904–11913CrossRefGoogle Scholar
  11. 11.
    Mehta BR, Singh VN (2005) Structural, electrical and gas-sensing properties of In2 O 3:Ag composite nanoparticle layers PRAMANA. Journal of Physics Indian Academy of Sciences 65(5):949–958Google Scholar
  12. 12.
    Aziz WJ, Jarhallah AK (2015) Effective doping concentration of indium on zinc oxide films using chemical spray pyrolysis technique. Optik - International Journal for Light and Electron Optics 126(20)CrossRefGoogle Scholar
  13. 13.
    Bagheri Mohagheghi M, Shahtahmasebi N (2009) Effect of the synthesis route on the structural properties and shape of the indium oxide (In2 O 3) nano-particles. Phys E 41:1757–1762CrossRefGoogle Scholar
  14. 14.
    Ivanovskaya M, Gurlo A, Bogdanov P (2001) Mechanism of O3 and NO2 detectionand selectivity of In2 O 3 sensors. Sens Actuators B 77:264–267CrossRefGoogle Scholar
  15. 15.
    Gaoa L, Chengb Z, Xiangb Q, Zhangb Y, Xua J (2015) Porous corundum-type In2 O 3 nanosheets: synthesis and NO2 sensing properties. Sensors Actuators B 208:436–443CrossRefGoogle Scholar
  16. 16.
    Guo MY, Liu F, Tsui J, Voskanyan AA, NG AMC, Djurisic AB, Chan WK (2015) Indium oxide cubes prepared by hydrothermal synthesis as catalysts for CO oxidation. Mater Chem Phys 153:243–247CrossRefGoogle Scholar
  17. 17.
    Song P, Han D, Zhang H, Li J, Yang Z, Wang Q (2014) Hydrothermal synthesis of porous In2 O 3 nanospheres with superior ethanol sensing properties. Sensors Actuators B 196:434–439CrossRefGoogle Scholar
  18. 18.
    Sun Y-F, Liu 3 S-B, Meng F-L, Liu J-Y, Jin Z, Kong L-T, Liu J-H (2012) Metal oxide nanostructures and their gas sensing properties:a review. Sensors 12:2610–2631CrossRefPubMedGoogle Scholar

Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  • Raad S. Sabry
    • 1
  • Ibrahim R. Agool
    • 1
  • Asaad M. Abbas
    • 1
    Email author
  1. 1.Department of Physics, College of ScienceMustansiriyah UniversityBaghdadIraq

Personalised recommendations