稀土-金属共掺杂纳米TiO_2的制备及其光催化性能
Preparation and Photocatalytic PropertiES of RE-metal Co-doped TiO_2 Nanoparticles
查看参考文献13篇
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文摘
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采用溶胶-凝胶法制备了稀土La~(3+)、Ce~(3+)单掺杂及La-Fe、Ce-Fe共掺杂TiO_2光催化剂,利用XRD、FE-SEM等手段对样品的结构、形貌进行了表征.以甲基橙为光催化反应模型化舍物,考察了掺杂对光催化活性的影响.实验结果表明:稀土-金属掺杂抑制了TiO_2锐钛矿相向金红石相的转变,抑制了纳米晶体的生长.掺杂后TiO_2光催化荆的光催化性能有明显提高,共掺杂TiO_2光催化剂产生了协同效应,其光催化性能优于单掺杂样品,以La 0.5%-Fe 0.05%共掺杂效果最佳. |
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其他语种文摘
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The RE single doped and co-doped TiO_2 were prepared by sol-gel method,the structure and shape were characterized by XRD,FE-SEM. The photocatalytic activities were evaluated by degradation of methyl orange. The results show that the co-doping with optimum RE and metal can restrain the transform of anatase structure to rutile structure and the growth of crystal,improve the photocatalytic efficiency. The co-doping of RE and metal show a synergistic effect for photocatalytic activity of TiO_2. The co-doped TiO_2 show higher photocatalytic activity in degradation of methyl orange than that of single doped TiO_2. Titania co-doped with La-Fe for n(La):n(TiO_2)=0.5%,n(Fe):n(TiO_2)=0.05% have the highest photocatalytic efficiency. |
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来源
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世界科技研究与发展
,2008,30(2):122-125 【扩展库】
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关键词
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二氧化钛
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共掺杂
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光催化
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协同效应
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地址
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中南大学物理科学与技术学院, 湖北, 长沙, 410083
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1006-6055 |
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学科
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化学 |
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基金
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中国博士后科学基金
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湖南省博士后基金
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文献收藏号
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CSCD:3311388
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参考文献 共
13
共1页
|
|
1.
乔仁桂. 纳米技术的发展及纳米催化剂在水处理中的应用.
能源与环境,2007,3:90-91
|
CSCD被引
2
次
|
|
|
|
|
2.
Fujishima A. Electrochemical photolysis of water at a semiconductor electrode.
Nature,1972,238:37-38
|
CSCD被引
2954
次
|
|
|
|
|
3.
高濂.
纳米氧化钛光催化材料及应用,2003
|
CSCD被引
8
次
|
|
|
|
|
4.
李振宏. 我国稀土应用的现状与前景.
稀土,1996,17(6):48-53
|
CSCD被引
32
次
|
|
|
|
|
5.
王艳芹. 二氧化钛和三氧化二铁复合纳米晶电极的光电化学性质.
物理化学学报,1999,15(3):222-227
|
CSCD被引
24
次
|
|
|
|
|
6.
Scherrer P. Bestimmung der grosse und der inneren struktur von kolloidteilchen mittels rontgenstrahlen.
Gottinger Nachr Math Phys,1918,2:98-100
|
CSCD被引
7
次
|
|
|
|
|
7.
尹荔松. 纳米TiO_2粉晶的XRD研究.
功能材料,1999,30(5):498-500
|
CSCD被引
41
次
|
|
|
|
|
8.
Rodriguez-Talaveraa R. Modification of the phase transition temperatures in titania doped with various cations.
J Mater Res,1997,12:439-442
|
CSCD被引
35
次
|
|
|
|
|
9.
Ranjite K T. Lanthanide oxide doped titanium dioxide photocatalysts:effective photoeatalysts for the enhanced degradation of salicylic acid and t-cinnamic acid.
J Catal,2001,204:305-313
|
CSCD被引
50
次
|
|
|
|
|
10.
Choi W. The role of metal-ion dopants in quantum-sized TiO2:correlation between photoreactivity and charge carrier recombination dynamics.
J Phys Chem,1994,98(51):13669-13679
|
CSCD被引
649
次
|
|
|
|
|
11.
Ara(n)a J. Maleic acid photocatalytic degradation using Fe-TiO2 catalysts:dependence of the degradation mechanism on the Fe catalysts content.
Applied Catalysis B:Envlronmental,2002,36:113-124
|
CSCD被引
1
次
|
|
|
|
|
12.
Andreozzi R. Removal of benzoic acid in aqueous golution by Fe(Ⅲ)homogeneous photocatalysis.
Water Research,2004,38:1225-1236
|
CSCD被引
6
次
|
|
|
|
|
13.
Franch M I. Enhanced photocatalytic degradation of maleic acid by Fe(Ⅲ)adsorption onto the TiO2 surface.
Catalysis Today,2005,101:245-252
|
CSCD被引
12
次
|
|
|
|
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