Phase development and photocatalytic ability of gel-derived P-doped TiO2

doi:10.1557/jmr.2007.0316

機構典藏 > College of Engineering > Graduate Institute & Department of Chemical and Materials Engineering > Journal Article > Item 987654321/44162

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Title:	Phase development and photocatalytic ability of gel-derived P-doped TiO2
Authors:	Yu, Hsuan-Fu
Contributors:	淡江大學化學工程與材料工程學系
Keywords:	Dopant;Phase transformation;Sol-gel
Date:	2007-09
Issue Date:	2010-03-09 09:59:46 (UTC+8)
Publisher:	New York: Cambridge University Press
Abstract:	P-doped titanium dioxide (TiO2) nanoparticles were synthesized using a sol-gel method. The ethanol solution of Ti(OC2H5)4 was mixed with an aqueous solution of H3PO4 to undergo hydrolysis and polycondensation at 90 °C for 4 h. The resultant solids were centrifugally filtered, dried, and then calcined at different temperatures, followed by chemical and physical characterization. At an atomic ratio of P/Ti = 0.03, the formed P-doped TiO2 can preserve its anatase structure at 900 °C for 3 h, with no formation of other phases. Further increasing the P/Ti atomic ratio in the P-doped TiO2 may stabilize the anatase–TiO2 at even higher temperatures but may lead to the formation of TiP2O7 or (TiO)2P2O7. A test of photocatalysis showed that the P-doped TiO2 nanoparticles, with a P/Ti ratio = 0.03 and after being calcined at temperatures between 400 and 800 °C, can decompose ≥98 mol.% of the methylene blue (MB) after 30 min of irradiation by 365-nm ultraviolet light, while P25 particles can only decompose 71 mol% of the MB.
Relation:	Journal of Materials Research 22(9), pp.2565-2572
DOI:	10.1557/jmr.2007.0316
Appears in Collections:	[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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