| 不同形貌稀土掺杂Gd2O3粉体的制备及光磁性能研究 |
| Synthesis and Optical/Magnetic Properties of Lanthanides Doped Gd2O3 with Different Morphologies |
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| 摘要: 采用水热法,利用不同添加剂:柠檬酸(CA)、油酸(OA)、乙二胺四乙酸(EDTA)制备出了不同形貌前驱物Gd(OH)3,并经退火得到不同形貌的Gd2O3样品(S-CA、S-OA、S-EDTA)。XRD图表明所制得Gd2O3粉末均为立方晶系(空间群为Ia3),并且不同添加剂所得粉晶的晶格常数略有不同:1.082 25 nm(S-CA),1.081 14 nm(S-OA),1.083 20 nm(S-EDTA);SEM图可看出其颗粒大小分别约为63 nm(S-CA),300 nm(S-OA),2 μm(S-EDTA);红外光谱则进一步证明3种产物均为Gd2O3,并且不同添加剂下样品的基团振动吸收强度不一样;利用荧光光谱仪和综合物性测量系统测量研究了经不同添加剂所制备出的稀土(Yb,Er/Ho)掺杂Gd2O3的上转换发光特性及磁学性能,结果表明:样品形貌对稀土掺杂Gd2O3上转换发光强度和顺磁磁化率影响较大,其中由EDTA添加剂所制备出的稀土掺杂Gd2O3粉末的上转换发光强度和顺磁磁化率最佳。 |
| 关键词: 稀土氧化物 添加剂 形貌 发光 磁性 |
| 基金项目: 国家自然科学基金(No.61172027);广东省自然科学基金重点(No.1414050000317)资助项目。 |
| Abstract: Gd2O3 samples (S-CA, S-OA, S-EDTA) with different morphologies are obtained via thermal treatment from the precursors Gd(OH)3, which are hydrothermally prepared using different additives: Citrate acid (CA), Oleic Acid (OA) and Ethylenediaminetetraacetic acid (EDTA). XRD patterns show that the structure of the as-prepared samples are typical cubic phase with Ia3 space group and slight differences in lattice constants: 1.082 25 nm (S-CA), 1.081 14 nm (S-OA), 1.083 20 nm (S-EDTA). SEM images show that the average particle sizes with different additives are 70 nm (S-CA), 300 nm (S-OA), 2 μm (S-EDTA), respectively. IR spectra further prove that all the samples are Gd2O3, and samples derived from different additives are coupled with organic groups which have different vibration absorption intensities. Upconversion(UC) luminescent and magnetic properties of Gd0.78Yb0.20Ln0.02O3(Ln=Er, Ho) were also studied. The results show that morphologies have a great impact on lanthanides doped UC luminescence intensity and paramagnetic susceptibility of Gd2O3 samples. Among them, both UC luminescence intensity and paramagnetic susceptibility of rare-earth doped Gd2O3 powders derived from EDTA reach the optimum values. |
| Keywords: rare-earth oxides additive morphology luminescence magnetic properties |
| 投稿时间：2014-09-01 修订日期：2014-12-11 |
| 摘要点击次数: 1534 |
| 全文下载次数: 1897 |
| 徐德康,刘楚枫,阎佳薇,欧阳红群,张曰理.不同形貌稀土掺杂Gd2O3粉体的制备及光磁性能研究[J].无机化学学报,2015,31(4):689-695. |
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