【正文】 9H2O,and 40 ml N AgNO3 were added respectively into the water to give a total volume of 50 grams of the asprepared TiO2 /ceramic and 10 ml CH3OH were wellmixed in the solution was exposed to UV light and stirred vigorously for 3 irradiation,the mixtureswere filtrated to obtain the solid phase,calcined at 450℃to obtain samples B,C and D.The posites were analyzed using BET(Quantachrome NOVA 2000),SEM(Hitachi S800),XRD(American Scintag XDS2000)using Cu Kα radiation(λ=)and ICPAES(PEOptima 3000DV),respectively. Photoactivity measurementThe photocatalytic activity of the samples was evaluated using the MB decolorization at room temperature(～25℃)under UV were performed as follows:about g of the posite samples was suspended in a 75 ml MB solution with a concentration of 10 mg/L in a reaction samples were agitated for 1 h in MB solution in the absence of light to attain the equilibrium 400 W UV light (LUXMEN)was used as the external light variation in MB during the experiment was measured using a Shimadzu PharmaSpec UV1601 spectrometer at 665 nm and 220 nm photocatalytic decolorization of the MB solution is considered a pseudofirstorder reaction and its kinetics are expressed as ln(C 0/C)=kt,where k is the apparent rate constant,and C 0 and C are the initial and reaction concentrations of aqueous MB,respectively.3. Results and Discussion Synthesis and characterization of posite samplesThe mesoporous ceramic powder was chosen as a host to immobilize nanophase TiO2 as well as modified is doubtful that the synthesis may alter the surface area and/or pore size of the asprepared 1 lists the BET results for pure ceramic,sample A,B,C and D,respectively. It is shown that TiO2 on ceramic would significantly increase the surface area as well as slightly decrease the pore may indicate that nanophase TiO2 particles are embedded onto the surface of the ceramic substrate and into the porous deposition of Fe,Ag and Pt onto TiO2 would not significantly change the surface area and pore size characteristics.Table 1 BET results for ceramic and photocatalystSample Surface area（m2/g） Pore size(A)Ceramic A B C D It is reasonable that metal ions in the solution can be directly reduced by the photocatalytic reaction of TiO2 with UV irradiation if the reduction potential of metal ions/metal is more positive than the conduction band of TiO2( V).However,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?；?，2001，(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 b