By a News Reporter-Staff News Editor at Electronics Newsweekly -- Researchers detail new data in Electrochemical Research. According to news reporting originating from Tehran, Iran, by VerticalNews correspondents, research stated, "Yttria-stabilized zirconia (YSZ)-based sensors using Pt/SnO2-based sensing electrodes were fabricated and applied to detect several volatile organic compounds (VOCs) including acetaldehyde, acetone, ethanol and toluene. The whole sensor was exposed to the VOCs-contaminated air, i.e. without air reference."
Our news editors obtained a quote from the research from the University of Tehran, "YSZ was prepared by coprecipitation, calcined, pelleted, and sintered at 1560 degrees C for 12 h. The YSZ pellet was coated with two layers of porous Pt electrode, on one of which as the sensing electrode, a layer of Pt/SnO2 doped with SiO2, MoO3, CeO2 or Sm2O3 was screen printed. The oxide-doped Pt/SnO2 samples were prepared by a sol-gel method and characterized by XRD, SEM, and BET. As 5 wt% SiO2 or Sm2O3 is doped onto the Pt/SnO2, the crystallite size decreases from 17 to 6 or 8 nm, respectively. An automated flow system was used for evaluating the sensors performances in presence of various VOCs of different concentrations at 350-600 degrees C. Response/recovery times of all VOCs sensors decrease with the oxide doping. Pt/SnO2 doped with 5 wt% CeO2, compared to other oxides, shows the highest EMF responses and lowest response and recovery times to the VOCs."
According to the news editors, the research concluded: "By increasing the Pt/CeO2/SnO2 sensing layer thickness, EMF response is enhanced and maximum response shifts to higher temperatures."
For more information on this research see: Coupled Metal Oxide-Doped Pt/SnO2 Semiconductor and Yittria-Stabilized Zirconia Electrochemical Sensors for Detection of VOCs. Journal of the Electrochemical Society, 2013;160(11):B218-B224. Journal of the Electrochemical Society can be contacted at: Electrochemical Soc Inc, 65 South Main Street, Pennington, NJ 08534, USA. (The Electrochemical Society - ecsdl.org/; Journal of the Electrochemical Society - www.ecsdl.org/JES)
The news editors report that additional information may be obtained by contacting M. Kasalizadeh, Univ Tehran, Nanoelect Center Excellence, Tehran, Iran. Additional authors for this research include A.A. Khodadadi and Y. Mortazavi.
Keywords for this news article include: Iran, Asia, Tehran, Chemistry, Electronics, Semiconductor, Electrochemical Research
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