【正文】 wever,there is no correlation between the reduction potential of the metal ions and the photocatalytic activity of the metal modified TiO2 photocatalyst.The metal ion deposition phenomena on the TiO2 surface could be explained by photoadsorption[9,10,11].UV light excites TiO2 to produce electronhole pairs,which migrate to the surface and initiate chemical redox electrons located on the surface make the hydroxyl form rapidly at the interface between the surface and hydroxyl。 郭少康 2010年6月 于唐山學院參考文獻[1] 高濂，鄭珊，化學工業(yè)出版社，2002：13[2] 方世杰，徐明霞，2001，29(5)：439442[3] (中試)，1990，(3)：8791[4] 劉守新，化學工業(yè)出版社，2006：18[5] 樊興君，尤進茂，1998，10(3)：286[6] 劉守新，化學工業(yè)出版社，2006：45[7] 張一兵，封心建，2007，38(6)：1012[8] 夏天，曹望和，2005，23(l)：105108[9] 張金龍，陳鋒，華東理工大學出版社，2004：5662[10] 祖庸，李曉娥，1999，(2)：2326[11] Bickley .,Wlliams .,Relative Proportions of rutile and Pseudobrookite Phase in the Fe(III) TiO2 system at elevated .，1997，51(10)：4753[12] Bacasa ., Kiwi J.,Effeet of rutile Phase on the Photoeatalytic Properties of nanoerystalline titania during the degration of coumaric acid，:Environ.，1998，16：929[13] 高濂，鄭珊，化學工業(yè)出版社，2002：4344[14] Fujishima A，Honda Photolysis of water at a semieonductor Electrode,Nature，1972，37：238245[15] 張立德，：北京科學出版社，2001：175198[16] （上）.上?；ぃ?001，(3)： 3738[17] 方曉明，瞿金清，2001，37(5)：39[18] 雷閆盈，2001，33(2)：3[19] 吳迎春，2001，14(4)：26[20] 張巖峰，魏雨，2000，31(4)：354[21] ，Synthesis of nanomnetersized TiO2 particles by microemulsion method，NanoStructure Matcrials，1999，11(5)：663[22] 金海巖，1997，18(2)：97102[23] 羅瑾，周靜，1998，19(9)：14541457[24] Chun He，Ya Xiong，Jian Chen，Changhong Zha，etal,Photoelectroehemical Performance of AgTiO2/ITO film and Photoelectrocatalitic towards the oxidation the of organic Pollutants， Photoblol，A Chem 2002，148：365374[25] Hirano K，Asayama H，Hoshino A，etal，Metal Powder addition effect on the Photocatalytic reactions and Photogenerated electrie charge collected at an inert electrode in aqueous TiO2 suspensions，Photoehem Photobio A,，110：307311[29] 吳海寶，1997，17(l)：9396[30] 張彭義，余剛，1997，5(3)：l10[31] 趙文寬，牛曉宇，2001，22(2)：171[32] 戴清，郭妍，1999，20(3)：317320[33] Sepone N，Texier I，Emeline A V， Effect and Reduetive Dechlorination of ChloroPhenols at oxygenFree TiO2 /Water Interfaces in the Presence of Prominent Holscavengers，Photochem Photochem Photobiol A，2000，136(3)：145152[34] ，1998，10(4)：349352[35] 于向陽，梁文，2000，1：5357[36] ，北京，國防工業(yè)出版社， 2001：145149[37] 姚曉斌，馬穎，1999，17（1）：1216[38] Marta ，Reviews，Heterogeneous Photoeatalysis Transition Mental Ions in Photoeatalytic System，Applied Catalysis B，Environmental，1999，23：89114[39] John ，Rominder ，Suri，David David ，Deeontamination of Whter Using Adsorption and Photoeatalysis，Water Researeh，1997，31(3)：411418[40] 崔鵬，徐南平，2002，16(2)：222225[41] 陳曦，2006，6(18):28132821[42] 廖東亮，20（5）:256260[43] 劉守新，化學工業(yè)出版社，2006:125[44] ，1998,19（1）：14[45] Junbiao Liu,John C Crittenden,David W Hand,etal,Regeneration of adsorbents using heterogeneous photocatalytic oxidation,Journal of Environmental Engineering,1996 (3)：2429[46] Mario Schiaveuo，Some Working Principles of Heterogeous Photocatalysis by Semiconductors，Elect rochemical Acta，1993，38 (1)：5660[47] Matthews R，Hydroxylation Reaction Induced by Nearultraviolet Photalysis of Aoueous Titanium Dioxide Suspensions，J Chem Soc Faraday Trans，1998，80：457471[48] Matthews R. Kinetics of Photocatalytic Oxidation of Organic Solutes Over Titanium Dioxide J of Catalysis,1998 (3)：264272外文資料Photosynthesis and Characterization of Pt,Fe and Ag Modified TiO2,2, *1Department of Atomic Science,NationalT sing Hua University,Hsinchu 300,Taiwan,2Chemical Analysis Division,Institute of Nuclear Energy Research, 319,Longtan 325,Taiwan,China.*Email ctyuAbstract: Metal ions modified TiO2 posites were prepared by first embedding nanosized TiO2 particles on the surface of porous ceramic powders,then photocatalytically reducing Fe+,Ag+ and Pt4+ on TiO2 respectively under UV reduced metals were then treated by calcinations at 450℃.The BrunauerEmmettTeller(BET), Scanning Electron Microscopy(SEM),Transmission Electron Microscopy(TEM),Xray diffraction(XRD),and Inductively Coupled PlasmaAtomicEmission Spectrometry(ICPAES) were used to characterize the posites’structure photocatalytic activity under UV irradiation was evaluated by the deposition ofmethylene blue(MB)aqueous solution.Keywords: TiO2,modified,photocatalyst,methylene blue1. IntroductionApplication of heterogeneous photocatalytic reactions with TiO2 for environmental cleanup hasn been widely reported and has bee promising[13] because of its various merits,low cost,chemical stability and ,the drawbacks for TiO2 photocatalysis in wastewater treatment include the difficulty in removing nanosized catalyst from the treated water and the rapid electronhole pair rebination in TiO2 resulting in low quantum yield. Because of the very small particle size requirement for TiO2 catalysts,the use and recollection of it in environmental applications may cause serious ,immobilizing nanosize TiO2 particles on a porous substrate material,such as silica or ceramic powders is of great interest[4，5].To improve the low quantum yields of photocatalytic processes,attempts have been made to deposit transition or noble metals such as Pd,Pt,Rh,Au,and Ag onto the TiO2 surface to increase the charge separation efficiency and inhibit electron and hole rebination induced by photons[68].In this study,the photosynthesis of Fe,Ag and Pt on TiO2/ceramic posite materials using a photocatalytic reduction method is metal modified TiO2 posites were prepared by first embedding nanosized TiO2 particles onto the surface of porous ceramic powders using the hydrolysis Fe3+,Ag+and Pt4+ on the TiO2 surface were photocatalytically reduced