Journal
INTERNATIONAL JOURNAL OF PHOTOENERGY
Volume 2009, Issue -, Pages -Publisher
HINDAWI LTD
DOI: 10.1155/2009/962783
Keywords
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Funding
- Ministry of Higher Education of Malaysia (MOHE) [FRGS 0106-22]
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Nanosized TiO2 powder was synthesized via sol-gel method using titanium tetraisopoxide (TPT) as the precursor. Mol ratios of water to TPT were varied from 1 (Powder A), 2 (Powder B), 3 (Powder C), and 4 (Powder D) to evaluate effect of hydrolysis degree. TG/DTA curves showed that amorphous phase turned to anatase crystal structure at ca. 415, 337, 310, and 339 degrees C for Powders A, B, C, and D, respectively. XRD analysis showed that all the synthesized TiO2 powders were 100% in anatase form with Powders B and C showing considerably higher crystallinities. The powders obtained at lower water to TPT mol ratios were spherical in shape and they became bar-like shapes higher mol ratios. The lower hydrolysis degree led to higher surface area of the Powder A (24.8 m(2)/g) compared to Powder B (14.6m(2)/g). From phenol photocatalytic measurement, Powder B was the most efficient attributed to its higher crystallinity. Copyright (C) 2009 N. Hafizah and I. Sopyan.
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