Skip to main content

Preparation and Gas Sensor Application of Ceramic Particles with Submicron-Size Spherical Macropores

Buy Article:

$113.00 plus tax (Refund Policy)

Abstract:

Porous SnO2 and In2O3 powders (pr-SnO2 and pr-In2O3, respectively) were prepared by pyrolysis of atomized SnCl4 and In(NO3)3 aqueous solutions containing polymethylmethacrylate (PMMA) microspheres (150 nm or 250 nm in diameter) as a template. Spherical macropores reflecting the morphology of the PMMA template could be formed in the pr-SnO2 and pr-In2O3 powders. H2 response of the pr-SnO2 was low, but addition of Pt was effective for improving the H2 response of the pr-SnO2. In addition, simultaneous loading of Pt and doping of Sb2O5 resulted in the largest H2 response along with relatively low resistance in air. On the other hand, a pr-In2O3 sensor showed much higher NO2 response than a conventional In2O3 sensor, which was fabricated with the nonporous powder prepared by hydrolysis of indium nitrate by an ammonia solution. These results show that introduction of macropores into ceramic powder used for sensor materials is very effective for improving their sensing properties.

Keywords: GAS SENSOR; IN2O3; MACROPORE; SNO2; ULTRASONIC SPRAY PYROLYSIS

Document Type: Research Article

DOI: https://doi.org/10.1166/sl.2008.524

Publication date: 2008-12-01

More about this publication?
  • The growing interest and activity in the field of sensor technologies requires a forum for rapid dissemination of important results: Sensor Letters is that forum. Sensor Letters offers scientists, engineers and medical experts timely, peer-reviewed research on sensor science and technology of the highest quality. Sensor Letters publish original rapid communications, full papers and timely state-of-the-art reviews encompassing the fundamental and applied research on sensor science and technology in all fields of science, engineering, and medicine. Highest priority will be given to short communications reporting important new scientific and technological findings.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more