Bi-doping effects on the structure and oxygen permeation properties of BaSc0.1Co0.9O3−δ perovskite membranes

Sunarso, Jaka, Motuzas, Julius, Liu, Shaomin and Diniz da Costa, Joao C. (2010) Bi-doping effects on the structure and oxygen permeation properties of BaSc0.1Co0.9O3−δ perovskite membranes. Journal of Membrane Science, 361 1-2: 120-125. doi:10.1016/j.memsci.2010.06.001


Author Sunarso, Jaka
Motuzas, Julius
Liu, Shaomin
Diniz da Costa, Joao C.
Title Bi-doping effects on the structure and oxygen permeation properties of BaSc0.1Co0.9O3−δ perovskite membranes
Formatted title
Bi-doping effects on the structure and oxygen permeation properties of BaSc0.1Co0.9O3−δ perovskite membranes
Journal name Journal of Membrane Science   Check publisher's open access policy
ISSN 0376-7388
Publication date 2010-09-30
Sub-type Article (original research)
DOI 10.1016/j.memsci.2010.06.001
Volume 361
Issue 1-2
Start page 120
End page 125
Total pages 6
Place of publication Amsterdam, The Netherlands
Publisher Elsevier
Collection year 2011
Language eng
Formatted abstract
In this work, we investigate the effect of partial substitution of bismuth oxide on BaSc0.1Co0.9O3−δ perovskite membranes. Doping was carried out in the A-site (Ba1−xBixSc0.1Co0.9O3−δ) and B-site (BaBixSc0.1Co0.9xO3−δ). Bi doping at or below 10% (x ≤ 0.10) in both sites resulted in significant increase of oxygen flux, up to two orders of magnitude at the low to medium temperature range (650–850 °C) as compared to non-doped disk membranes. Among all compositions, B-site doped x = 0.05 showed the highest oxygen fluxes, reaching 2.17 ml min−1 cm−2 at 950 °C. These results suggest that Bi doping at or below 10% conferred superior ionic oxygen diffusion transport, owing to the formation of cubic structures. Further increases in the Bi-doping amount formed non-cubic structure delivering very low oxygen fluxes. The structure transition phenomena from non-cubic to cubic crystal lattices occurred for non-doped and A-site doped membrane with 20 and 30% mole bismuth oxide in excess of 800 °C, concomitantly with increases in oxygen fluxes and sharp rise of electrical conductivity. A-site and B-site doped x = 0.05 compounds exposed to nitrogen atmosphere at 850 °C for 7 days showed reasonable stable structure.
© Copyright 2010 Elsevier B.V.

Keyword Bismuth oxide
Cubic structure
Perovskite
Ionic diffusion
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2011 Collection
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 27 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 27 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Sun, 05 Sep 2010, 00:04:52 EST