Eu2+/Gd3+-codoped nanocrystalline titania catalyst and its photocatalytic activity under natural light
Eu2+/Gd3+-codoped nanocrystalline titania catalysts were prepared by a modified sol-gel method.Powder X-ray diffraction,Transmission electron microscopy and UV-Vis spectra analyse were carried out to characterize the catalysts with different Eu2+/Gd3+contents.The photocatalytic efficiency was evaluated by the photodegradation of methyl orange in an aqueous solution under natural light irradiation.It has been confirmed that Eu2+/Gd3+-codoped titania could be excited by natural light.The higher natural light activity is due to the codoping of Eu2+/Gd3+.An optimum synergetic effect was found for a mass ratio of Eu/TiO2 equal to 1.0％ and Gd/TiO2 equal to 0.5％.The effects induced by Eu2+/Gd3+-codoped on the titania catalysts may be explained in terms of Gd3+→Eu2+ energy transfer to affect the photocatalysis activity of the titania catalysts.
titania catalysts codoping synergetic effect
ZHOU Yi HUANG Ke-long ZHU Zhi-ping XIA Chang-bin
School of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China;School o School of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China; School of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China
国际会议
2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)
长沙
英文
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）