Citation: XU De-Kang, LIU Chu-Feng, YAN Jia-Wei, OUYANG Hong-Qun, ZHANG Yue-Li. Synthesis and Optical/Magnetic Properties of Lanthanides Doped Gd2O3 with Different Morphologies[J]. Chinese Journal of Inorganic Chemistry, ;2015, (4): 689-695. doi: 10.11862/CJIC.2015.076
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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.
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