| 稀土纳米介孔固体电子顺磁共振 |
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| 引用本文： | 张世英,魏坤.稀土纳米介孔固体电子顺磁共振[J].化工学报,2005,56(1):163-167. |
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| 作者姓名： | 张世英 魏坤 |
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| 作者单位： | 长沙大学，湖南 长沙 410003;湖南大学材料科学与工程学院，湖南 长沙 410082 |
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| 基金项目： | 湖南省自然科学基金项目 (0 2JJY3 0 47)~~ |
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| 摘 要： | 以RE（NO3）3为先驱物，采用原位掺入技术把稀土离子组装进了稀土纳米in-RE-HMS（RE：Nd,Sm）六方介孔固体中.未焙烧in-RE-HMS样品的EPR谱为直线，没有顺磁特性，然而焙烧后的介孔固体却显示一个各向同心线中心.稀土离子取代Si原子之后，产生了零场分裂常数的分布.纳米in-RE-HMS（RE：Nd，Sm）介孔固体的giso值依次为 2.187、2.163,峰到峰的线宽依次为0.03 T、0.03 T.纳米in-RE-HMS（RE：Nd，Sm）介孔固体的尺寸依次为31 nm、21 nm.平均孔径依次为2.27 nm和2.18 nm.
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| 关 键 词： | 稀土 纳米介孔固体 电子顺磁共振 机理 |
| 文章编号： | 0438-1157(2005)01-0163-05 |
| 收稿时间： | 2003-9-14 |
| 修稿时间： | 2004-3-1
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Rare earth nanoscale mesoporous solid with electron paramagnetic resonance |
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| ZHANG Shiying,WEI Kun.Rare earth nanoscale mesoporous solid with electron paramagnetic resonance[J].Journal of Chemical Industry and Engineering(China),2005,56(1):163-167. |
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| Authors: | ZHANG Shiying WEI Kun |
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| Abstract: | The rare earth ions (RE 3 :Nd 3 ,Sm 3 )were loaded into the HMS by the in situ incorporation technique in which RE(NO 3) 3was used as RE 3 precursor.The EPR spectra of synthesised samples were beeline.The distribution of zero region split parameter arose from substituting silicon atomic with rare earth.The EPR spectra of RE-HMS(RE:Nd,Sm) calcined nanoscale samples showed one isotropic line centered at g iso=2.187,2.163,with peak to peak line width of about 0.03 T and 0.03 T,respectively.The mesoporous solid size of RE-HMS (RE:Nd,Sm) was 31 nm in Nd-HMS and 21 nm in Sm-HMS.The pore size of mesoporous materials RE-HMS (RE:Nd,Sm) from adsorption isotherms was 2.27 nm,2.18 nm,respectively. |
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| Keywords: | rare earth nanoscale mesoporous solid electron paramagnetic resonance mechanism |
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