Bibliographic Details
| Title: |
Flame-made Nb- and Cu-doped TiO2 sensors for CO and ethanol |
| Authors: |
Teleki, Alexandra1, Bjelobrk, Nada1, Pratsinis, Sotiris E. pratsinis@ptl.mavt.ethz.ch |
| Source: |
Sensors & Actuators B: Chemical. Mar2008, Vol. 130 Issue 1, p449-457. 9p. |
| Subjects: |
Alcohol, Alcohols (Chemical class), Alcoholic beverages, Alcoholism |
| Abstract: |
Abstract: Nb- and Cu-doped TiO2 nanoparticles were produced by flame spray pyrolysis (FSP) and tested for sensing of CO and ethanol at 400°C in dry air. The as-prepared powders were characterized by transmission electron microscopy, X-ray diffraction, Raman spectroscopy and nitrogen adsorption. Niobium stabilized the anatase phase and retarded grain growth up to 600°C. Copper promoted rutile formation and an anatase to rutile transformation was already observed just above 400°C during post-synthesis calcination. This was accompanied by a segregation of large (>100nm) CuO crystals which were initially small (<5nm) asperities on the titania surface. Pure as well as doped TiO2 showed an n-type signal to CO and ethanol. Both dopants improved the sensitivity towards CO over that of pure TiO2. In contrast, for ethanol a high increase in sensitivity was observed only for Nb/TiO2. [Copyright &y& Elsevier] |
|
Copyright of Sensors & Actuators B: Chemical is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| Database: |
Engineering Source |
