| La掺杂TiO2介孔微球的超声水热合成和光催化性能 |
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| 引用本文： | 刘国聪,李海斌,董辉.La掺杂TiO2介孔微球的超声水热合成和光催化性能[J].无机材料学报,2011(7):739-746. |
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| 作者姓名： | 刘国聪 李海斌 董辉 |
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| 作者单位： | 玉林师范学院新材料研发与化学生物传感技术所;中南大学化学化工学院;长沙理工大学物理与电子技术学院; |
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| 基金项目： | 广西自然科学青年基金(2010GXNSFB013018,2011GXNSFA018049); 广西高校优秀人才资助项目(G2009033,G2009045); 广西科学技术研究和开发项目(桂科攻10100003-2,10124008-9); 国家自然科学基金(21061006)~~ |
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| 摘 要： | 以钛酸四丁酯为钛源、硝酸镧为镧源、十二胺为模板剂,采用超声?水热法合成了La3+掺杂介孔TiO2微球,并利用XRD、XPS、TEM、BET、UV-Vis、IR、FL等手段表征了材料的结构、形貌、比表面积、孔径分布及光学性能.研究结果表明,适量La3+离子掺杂不仅能使介孔TiO2晶粒细化,比表面积增大,荧光强度减弱.La3+/TiO2的光吸收边红移,并具有比商业P25更好的光催化活性,其中介孔La3+/TiO2(2.0at%)的比表面积和平均孔径分别为132.7 m2/g和8.67 nm,光催化降解初始浓度为40 mg/L的亚甲基蓝溶液120 min时,其降解率达到98.5%,表现出最强的光降解能力.
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| 关 键 词： | 介孔TiO2 镧掺杂 亚甲基蓝 光催化剂 |
Ultrasonic-hydrothermal Synthesis and Photocatalytic Activities of La-doped Mesoporous TiO_2 Microspheres |
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| LIU Guo-Cong,LI Hai-Bin,DONG Hui.Ultrasonic-hydrothermal Synthesis and Photocatalytic Activities of La-doped Mesoporous TiO_2 Microspheres[J].Journal of Inorganic Materials,2011(7):739-746. |
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| Authors: | LIU Guo-Cong LI Hai-Bin DONG Hui |
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| Affiliation: | LIU Guo-Cong1,3,LI Hai-Bin2,DONG Hui1(1.Institute of advanced materials & Chembiosensing Technology,Yulin Normal University,Yulin 537000,China,2.Institute of Inorganic Materials,School of Physics and Electronics,Changsha University of Science and Tchnology,Changsha 410114,3.College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China) |
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| Abstract: | With tetrabutyl orthotitanate(TBOT) as Ti source,La(NO3)3.6H2O as La source and octadecylamine as a template,La-doped mesoporous TiO2 microspheres were prepared by ultrasonic-hydrothermal method.The ob-tained samples were characterized by XRD,XPS,TEM,BET,UV-Vis,IR and FL.The results revealed that the ap-propriate molar fraction of La dopant could decrease crystalline size,increase specific surface area and weaken fluorescence intensity of mesoporous TiO2.Compared with P25,the gap adsorption edge of mesoporo... |
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| Keywords: | mesoporous TiO2 La-doping methylene blue photocatalys |
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