Academic Journals Database
Disseminating quality controlled scientific knowledge

Fabrication of Porous TiO2 Hollow Spheres and Their Application in Gas Sensing

Author(s): Yang Gang | Hu Peng | Cao Yuebin | Yuan Fangli | Xu Ruifen

Journal: Nanoscale Research Letters
ISSN 1931-7573

Volume: 5;
Issue: 9;
Start page: 1437;
Date: 2010;
Original page

Keywords: Porous TiO2 | Hollow sphere | Hydrothermal synthesis | Gas sensing

Abstract In this work, porous TiO2 hollow spheres with an average diameter of 100 nm and shell thickness of 20 nm were synthesized by a facile hydrothermal method with NH4HCO3 as the structure-directing agent, and the formation mechanism for this porous hollow structure was proved to be the Ostwald ripening process by tracking the morphology of the products at different reaction stages. The product was characterized by SEM, TEM, XRD and BET analyses, and the results show that the as-synthesized products are anatase phase with a high surface area up to 132.5 m2/g. Gas-sensing investigation reveals that the product possesses sensitive response to methanal gas at 200°C due to its high surface area.
Save time & money - Smart Internet Solutions     

Tango Jona
Tangokurs Rapperswil-Jona