| Yb-TiO2光催化剂的制备及性能研究 |
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| 引用本文： | 徐刘君,燕宁宁,朱忠其,柳清菊. Yb-TiO2光催化剂的制备及性能研究[J]. 功能材料, 2012, 0(6): 771-774 |
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| 作者姓名： | 徐刘君 燕宁宁 朱忠其 柳清菊 |
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| 作者单位： | 云南大学云南省高校纳米材料与技术重点实验室 |
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| 基金项目： | 国家自然科学基金资助项目(50862009,51062017) |
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| 摘 要： | 采用溶胶-凝胶法制备了稀土Yb掺杂纳米TiO2光催化剂(Yb-TiO2),采用XRD、UV-Vis、FT-IR等方法对其进行表征和分析,并以亚甲基蓝(MB)作为目标降解物,考察了热处理温度以及Yb掺杂量对样品性能的影响。实验结果表明,Yb掺杂样品均为金红石相和锐钛矿相的混晶相,Yb的掺入拓展了TiO2对可见光的吸收范围,有效地抑制了光生电子-空穴对的复合,提高了TiO2的光催化活性。当pH值=2.5、n(Yb)∶n(Ti)=0.005、热处理温度为650℃时,制备的样品其光催化活性明显优于Degussa P25。
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| 关 键 词： | 纳米TiO2 Yb掺杂 光催化 |
Preparation and properties of Yb-TiO2 photocatalysts |
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| XU Liu-jun,YAN Ning-ning,ZHU Zhong-qi,LIU Qing-ju. Preparation and properties of Yb-TiO2 photocatalysts[J]. Journal of Functional Materials, 2012, 0(6): 771-774 |
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| Authors: | XU Liu-jun YAN Ning-ning ZHU Zhong-qi LIU Qing-ju |
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| Affiliation: | (Yunnan Key Laboratory of Nanomaterials & Technology,Yunnan University,Kunming 650091,China) |
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| Abstract: | Yb-doping TiO2 photocatalysts were synthesized by sol-gel method and characterized by XRD,UV-Vis,FT-IR et al.Meanwhile,the degradation of methyl blue(MB) was investigated under fluorescent lamp to test the influence of different Yb-doping concentration and sintered temperature on the photocatalytic activity of the prepared samples.The results show that all the prepared samples consist of anatase and rutile phases.Yb-doping can extend the absorption spectrum of TiO2 to the visible light region and increase the separation of the photoelectron-hole pairs.Thus,the photocatalytic activity is improved.The best preparation condition is as follows: sintered temperature T=650℃,Yb-doping concentration: n(Yb)∶n(Ti)= 0.005 and pH value=2.5. |
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| Keywords: | nano TiO2 photocatalysts Yb-doping photocatalytic activity |
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