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酸催化溶胶-凝胶法Eu2+、Gd3+共掺杂TiO2的制备及光催化活性
引用本文:周 艺,黄可龙,朱志平,杨 波,夏畅斌,肖汉宁.酸催化溶胶-凝胶法Eu2+、Gd3+共掺杂TiO2的制备及光催化活性[J].无机材料学报,2008,23(5):1085-1088.
作者姓名:周 艺  黄可龙  朱志平  杨 波  夏畅斌  肖汉宁
作者单位:1.中南大学化学化工学院,长沙410083;2.长沙理工大学化学与环境工程学院,长沙410077
摘    要:采用酸催化溶胶-凝胶法制备了Gd3+、Eu2+两种稀土金属离子混合掺杂的复合TiO2光催化剂, 通过TEM、XRD、UV-Vis等分析手段对产物进 行了表征, 结果表明: 样品均呈锐钛矿型结构, 颗粒尺寸的变化只与掺杂离子总量有关, 掺杂量为1.0%时达最小值; 一定比例Eu2+、Gd3+的混合掺杂, 能增强可见光范围内光响应. 以甲基橙为目标降解物研究了不同比例Eu2+、Gd3+混合掺杂对纳米二氧化钛光催化活性的影响, Gd3+、Eu2+适合掺杂量范围分别为0.1%~1.0%和0.5%~1.5%. Eu2+、Gd3+混和掺入TiO2光催化剂中产生协同效应, 探讨了Eu2+和Gd3+与TiO2之间的相互作用, 讨论了光催化活性与催化剂性质的关系.

关 键 词:稀土  共掺杂  协同效应  光催化
收稿时间:2008-1-3
修稿时间:2008-5-29

Preparation and Photocatalysis Activity of Eu2+/Gd3+ codoped Nano-TiO2 Multiplex Photocatalyst from Sol-Gel Process Catalyzed with Acid
ZHOU Yi,HUANG Ke-Long,ZHU Zhi-Ping,YANG Bo,XIA Chang-BinXIAO Han-Ning.Preparation and Photocatalysis Activity of Eu2+/Gd3+ codoped Nano-TiO2 Multiplex Photocatalyst from Sol-Gel Process Catalyzed with Acid[J].Journal of Inorganic Materials,2008,23(5):1085-1088.
Authors:ZHOU Yi  HUANG Ke-Long  ZHU Zhi-Ping  YANG Bo  XIA Chang-BinXIAO Han-Ning
Affiliation:1.CollegeofChemistryandChemicalEngineering,CentralSouthUniversity,Changsha410083,China;2.CollegeofChemistryandEnvironmentEngineering,ChangshaUniversityofScienceandTechnology,Changsha410076,China
Abstract:A new nano-TiO2 multiplex photocatalyst codoped with Eu2+ and Gd3+ was prepared by a modified acidic sol-gel process. TEM and XRD results demonstrate that as-produced samples are anatase structure, and the crystallite size has relationship only with total doped Eu2+/Gd3+ content and the minimum size appeares at 1% doped content. UV-Vis absorption spectra show that Eu3+/Gd3+ codoping can enhance the visible light response of the TiO2. The photocatalyst activity of Eu2+/Gd3+ codoped TiO2 is evaluated by photodegradation of methyl orange in an aqueous solution under natural light irradiation, A synergetic effect is observed due to Eu2+/Gd3+ codoping, and the optimal doping concentration for Gd3+ and Eu2+ are in the range from 0.1% to 1.0% and 0.5% to 1.5% respectively. The relationship and function between Eu2+, Gd3+ and TiO2 are also discussed.
Keywords:rare earth  codoping  synergetic effect  photocatalysis
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