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.
In this work, porous TiO2 hollow spheres with an average diameter of 100Â nm and shell thickness of 20Â 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 132.5Â m2/g. Gas-sensing investigation reveals that the product possesses sensitive response to methanal gas at 200Â°C due to its high surface area.
|Uncontrolled Keywords:||Porous TiO2, Hollow sphere, Hydrothermal synthesis, Gas sensing|
|Subjects:||Material Science > Nanofabrication processes and tools|
Analytical Science > Nanotechnology for sensing and actuating
|Deposited On:||21 Oct 2010 09:28|
|Last Modified:||21 Oct 2010 09:28|
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