| Ce3+掺杂La2O3的17O固体核磁共振研究 |
| 17O Solid-State NMR Studies of Ce3+ Doped La2O3 |
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| 摘要: 本文用水热共沉淀法制备Ce3+掺杂La2O3的前驱体，随后在H2/N2气氛下用高温煅烧法合成了不同Ce3+浓度的掺杂La2O3。由于Ce3+的掺杂，17O固体核磁共振谱图中在698、650和558处出现了新的共振峰；随着Ce3+掺杂浓度的增加，这些峰的强度也随之增强。根据谱峰位置和强度，对谱图进行了归属：698、650处的共振峰应源自与Ce3+相连的四配位O(OCeLa3)，558处的信号则来自于与Ce3+相连的六配位O(OCeLa5)。通过17O固体核磁共振能够直接观测与Ce3+直接相连的O显示该方法将可能用于研究稀土掺杂氧化物功能材料。 |
| 关键词: 氧化镧 核磁共振 三价铈 密度泛函 氧17 |
| 基金项目: 973计划青年科学专题（No．2013CB934800）资助项目。 |
| Abstract: In this paper, La2O3 doped with varied Ce3+ concentrations were synthesized via hydrothermal co-precipitation followed by high temperature calcined process in H2/N2 atmosphere. Three new peaks show up at 698, 650 and 558 in 17O solid state NMR spectra due to Ce3+ doping. The intensies of these peaks increase with Ce3+ concentration. According to the resonant frequencies and the intensities, the peaks at around 698 and 650, and 558 are assigned to four-coordinated OCeLa3 and six-coordinated OCeLa5 species, respectively. The results show that 17O solid-state NMR spectroscopy can be used to study rare earth doped oxides for applicable functional materials. |
| Keywords: lanthanum oxide NMR Ce3+ density functional theory 17O |
| 投稿时间：2013-05-04 修订日期：2013-07-04 |
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| 赵理,丁维平,彭路明.Ce3+掺杂La2O3的17O固体核磁共振研究[J].无机化学学报,2013,29(12):2509-2513. |
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