Nano Archive

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

Yang, Gang and Hu, Peng and Cao, Yuebin and Yuan, Fangli and Xu, Ruifen (2010) Fabrication of Porous TiO2 Hollow Spheres and Their Application in Gas Sensing. Nanoscale Research Letters, 5 (9). pp. 1437-1441.

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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.

Item Type:Article
Uncontrolled Keywords:Porous TiO2, Hollow sphere, Hydrothermal synthesis, Gas sensing
Subjects:Material Science > Nanofabrication processes and tools
Analytical Science > Nanotechnology for sensing and actuating
ID Code:9541
Deposited By:SPI
Deposited On:21 Oct 2010 09:28
Last Modified:21 Oct 2010 09:28

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