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Title: A two-step sol-gel method for synthesis of nanoporous TiO 2
Authors: Kartini, I.
Meredith, P.
Zhao, X.S. 
Diniz Da Costa, J.C.
Lu, G.Q.
Keywords: Anatase Domains
Mesoporous Titania
Sol-Gel Technique
Titania Films
Wide Band Gap Semiconductor
Issue Date: Mar-2004
Citation: Kartini, I., Meredith, P., Zhao, X.S., Diniz Da Costa, J.C., Lu, G.Q. (2004-03). A two-step sol-gel method for synthesis of nanoporous TiO 2. Journal of Nanoscience and Nanotechnology 4 (3) : 270-274. ScholarBank@NUS Repository.
Abstract: This article reports a study of the effects of synthesis parameters on the preparation and formation of mesoporous titania nanopowders by employing a two-step sol-gel method. These materials displayed crystalline domains characteristic of anatase. The first step of the process involved the hydrolysis of titanium isopropoxide in a basic aqueous solution mediated by neutral surfactant. The solid product obtained from step 1 was then treated in an acidified ethanol solution containing the same titanium precursor to thicken the pore walls. Low pH and higher loading of the Ti precursor in step 2 produced better mesoporosity and crystallinity of titanium dioxide polymorphs. The resultant powder exhibited a high surface area (73.8 m 2/g) and large pore volume (0.17 cm 3/g) with uniform mesopores. These materials are envisaged to be used as precursors for mesoporous titania films as a wide band gap semiconductor in dye-sensitized nanocrystalline TiO 2 solar cells.
Source Title: Journal of Nanoscience and Nanotechnology
ISSN: 15334880
DOI: 10.1166/jnn.2004.037
Appears in Collections:Staff Publications

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