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Citation: WANG Miao, SHEN Xin-Lin, TANG Yan-Feng, JIANG Guo-Qing, SHI Yu-Jun. Glycine-Assisted Hydrothermal Synthesis of CaF2∶Ln3+(Ln=Eu, Tb) Microcrystals with Different Morphologies[J]. Chinese Journal of Inorganic Chemistry, ;2012, 28(12): 2660-2666. shu

Glycine-Assisted Hydrothermal Synthesis of CaF2∶Ln3+(Ln=Eu, Tb) Microcrystals with Different Morphologies

  • 1.

    School of Chemistry and Chemical Engineering, Nantong University, Nantong, Jiangsu 226019, China

  • Corresponding author: SHI Yu-Jun, 
  • Received Date: 27 March 2012
    Available Online: 25 June 2012

    Fund Project: 国家自然科学基金(No.21173122,20906052) (No.21173122,20906052)江苏省自然科学基金(No.BK2010281) (No.BK2010281)南通市应用研究计划项目(BK2011035) (BK2011035)

  • By employing KBF4 or K2SiF6 as fluoride source, a facile glycine-assisted hydrothermal route has been developed to synthesize a series of well-dispersed CaF2∶Ln3+(Ln=Eu, Tb) microcrystals with a variety of morphologies, such as cubes, hollow polyhedra and hollow spheres. X-ray diffraction (XRD), Fourier transform IR (FTIR), scanning electron microscopy (SEM) and photoluminescence (PL) were used to characterize the purity, crystalline phase, morphologies and the photoluminescence properties of the samples. The XRD results show that all the as-prepared CaF2 have cubic structure and high crystallinity. The SEM results indicate that, in the presence of glycine, the as-prepared CaF2 microcrystals present morphologies of highly dispersed hollow polyhedra and hollow spheres obtained from KBF4 and K2SiF6, respectively. Meanwhile, the CaF2 hollow spheres were assembled from numerous nanocubes. In the synthetic process, glycine, fluoride source and reaction time play crucial role in confining the growth of the different morphological CaF2 microcrystals. The growth mechanism for products with diverse microstructures have been proposed based on the experimental results.
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