出版日期：2007-09-01 00:00:00

著者：Yu, Hsuan-Fu

單位：淡江大學化學工程與材料工程學系

出版者：New York: Cambridge University Press

著錄名稱、卷期、頁數：Journal of Materials Research 22(9), pp.2565-2572

摘要：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.

關鍵字：Dopant; Phase transformation; Sol-gel

語言：en

ISSN：0884-2914 2044-5326

期刊性質：國外

收錄於：EI SCI

國別：USA

出版型式：紙本 電子版