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《Journal of the Chinese Ceramic Society》 2007-06
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PHOTOCATALYTIC ACTIVITY OF SILVER AND PRASEODYMIUM CO-DOPED TITANIUM OXIDE NANAMETER PARTICLES

YUAN Changlai 1,DONG Faqin 2(1.Guilin University of Electronic Technology,Guilin 541004,Guangxi;2.Southwest University of Science and Technology,Mianyang 621010,Sichuan,China)  
Silver and praseodymium co-doped titanium oxide[(Ag,Pr)/TiO2]nanometer materials were prepared by the dipping method using Pr(NO3)3.5H2O and AgNO3 as precursors.The phases and photocatalytic activity of(Ag,Pr)/TiO2 nanometer materials were characterized by X-ray diffraction(XRD),ultraviolet-visual spectrometry,and electron spin resonance(ESR).The results of the XRD show that the crystalline particle size of(Ag,Pr)/TiO2 nanometer materials is enlarged gradually with the increase of calcining temperatures from 300℃to 800℃but the crystalline particle size under calcination at 400℃is relatively lower than at 300℃.The rutile phase of crystalline particles began to appear at 600℃and increased slightly with the increase of calcination temperatures.The light response region of(Ag,Pr)/TiO2 nanometer materials is within the range of 200—230 nm wavelength,where its absorption of light is very sharp.The(Ag,Pr)/TiO2 nanometer materials could bring far higher intensity of.OH(reaching 120 000)than nano-TiO2 and Pr/TiO2 nanometer materials with ultraviolet illumination according to the ESR spectrum.However,the.OH intensity of the(Ag,Pr)/TiO2 is very low in the absence of illumination.
【Fund】: 生态功能基元材料与复合建材集成技术开发(2001AA322070)资助项目
【CateGory Index】: TB383.1;O644.1
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