Highly Organized Mesoporous Titania Thin Films Showing Mono-Oriented 2D Hexagonal Channels
✍ Scribed by D. Grosso; G. J. de A. A. Soler-Illia; F. Babonneau; C. Sanchez; P.-A. Albouy; A. Brunet-Bruneau; A. R. Balkenende
- Publisher
- John Wiley and Sons
- Year
- 2001
- Tongue
- English
- Weight
- 265 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0935-9648
No coin nor oath required. For personal study only.
✦ Synopsis
Experimental
Ce 0.8 Gd 0.2 O 2±x (denoted CGO; #595 250A, Rhodia GmbH, Frankfurt, Germany) with a crystallite size of 40 nm and a specific surface area of about 24 m 2 /g was used as starting powder. The total amount of impurities was less than 0.2 wt.-%. Transition metal nitrates (e.g., Co(NO 3 ) 2 ´6H 2 O, Fluka AG, Buchs, Switzerland) were added to a CGO/ethanol suspension (Fluka, puriss. p.a.). After drying at 120 C for 2 h the powders were isostatically dry-pressed at 840 MPa for 3 min. The samples (6 3 3 mm 3 ) were sintered in a dilatometer. Constant heating rate sintering was performed at a rate of 5 C/min. Densities were measured using the Archimedes principle before and after sintering.