Effect of pH on particles size and gas sensing properties of In{sub 2}O{sub 3} nanoparticles

Journal Article · Mon May 23 04:00:00 EDT 2016 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4947787· OSTI ID:22606354

Anand, Kanica; Thangaraj, Rengasamy; Singh, Ravi Chand ^[1]

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1. Department of Physics, Guru Nanak Dev University, Amritsar 143005 (India)

In this work, indium oxide (In{sub 2}O{sub 3}) nanoparticles have been synthesized by co-precipitation method and the effect of pH on the structural and sensor response values of In{sub 2}O{sub 3} nanoparticles has been reported. X-ray diffraction pattern (XRD) revealed the formation of cubic phase In{sub 2}O{sub 3} nanoparticles. FESEM results indicate the formation of nearly spherical shape In{sub 2}O{sub 3} nanoparticles. The band gap energy value changed with change in pH value and found to have highest value at pH 9. Indium oxide nanoparticles thus prepared were deposited as thick films on alumina substrates to act as gas sensors and their sensing response to ethanol vapors and LPG at 50 ppm was investigated at different operating temperatures. It has been observed that all sensors exhibited optimum response at 300°C towards ethanol and at 400°C towards LPG. In{sub 2}O{sub 3} nanoparticles prepared at pH 9, being smallest in size as compared to other, exhibit highest sensor response (SR).

• OSTI ID: 22606354
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1731; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ALUMINIUM OXIDES
COMPARATIVE EVALUATIONS
COPRECIPITATION
ETHANOL
FILMS
INDIUM OXIDES
NANOPARTICLES
PARTICLE SIZE
PH VALUE
SENSORS
SUBSTRATES
VAPORS
X-RAY DIFFRACTION