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首页> 外文期刊>RSC Advances >Controllable synthesis of uniform CaMoO4:Eu3+, M+ (M = Li, Na, K) microspheres and optimum luminescence properties
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Controllable synthesis of uniform CaMoO4:Eu3+, M+ (M = Li, Na, K) microspheres and optimum luminescence properties

机译：可控合成均匀Camoo4：Eu3 +，M +（M = Li，Na，K）微球和最佳发光性能

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摘要

High-quality and monodisperse CaMoO4:Eu3+, M+ (M = Li, Na, K) microspheres have been synthesized with the assistance of poly-(diallyldimethylammonium chloride) (PDDA) via a facile coprecipitation hydrothermal route. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), as well as photoluminescence (PL) spectroscopy are used to characterize the resulting samples. The results show that the CaMoO4:Eu3+, M+ (M = Li, Na, K) can be directly indexed to a tetragonal CaMoO4 phase with high purity. A series of controlled experiments indicate that PDDA as a shape modifier introduced into the reaction system plays a critical role in the morphology of the final products. Furthermore, the shape and size of the products can be further manipulated by adjusting the concentration of PDDA and pH values in the initial solution. The prepared microspheres are stable at a suitable annealing temperature. The possible formation mechanism for these microspheres is presented. Additionally, the PL properties of CaMoO4:Eu3+, M+ (M = Li, Na, K) were investigated in detail. The results reveal that the red emission peak intensities of CaMoO4:Eu3+, Li+ and CaMoO4:Eu3+, Na+ are higher than that of CaMoO4:Eu3+, K+. The particle size and shape have a remarkable effect on the photoluminescence properties of the phosphor. The luminescence intensity is observably enhanced with increasing of the annealing temperature due to eliminating PDDA and/or H2O present in the samples and to the improved crystal quality.
机译：通过容易共沉淀的水热途径，通过助长（二烯丙基二甲基氯化铵）（PDDA）来合成高质量和单分散Camoo4：Eu3 +，M +（M = Li，Na，K）微球。 X射线衍射（XRD），扫描电子显微镜（SEM），能量分散X射线光谱（EDS），透射电子显微镜（TEM），热重分析（TGA），X射线光电子谱（XPS）以及光致发光（PL）光谱用于表征所得样品。结果表明，Camoo4：Eu3 +，M +（M = Li，Na，K）可以直接分为高纯度的四方Camoo4相。一系列受控实验表明，作为引入反应系统的形状改性的PDDA在最终产品的形态中起着关键作用。此外，可以通过调节初始溶液中的PDDA和pH值的浓度来进一步操纵产品的形状和尺寸。制备的微球在合适的退火温度下是稳定的。提出了这些微球的可能形成机制。另外，详细研究了Camoo4：Eu3 +，M +（M = Li，Na，K）的Pl性能。结果表明，Camoo4：Eu3 +，Li +和Camoo4：Eu3 +，Na +的红色发射峰强度高于Camoo4：Eu3 +，K +。粒径和形状对磷光体的光致发光性质具有显着影响。由于消除样品中存在的PDDA和/或H2O和改善的晶体质量，随着退火温度的增加，可以显着增强发光强度。

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  • 来源
    《RSC Advances》 |2015年第13期|共14页
  • 作者

    Liu Xiaoguang; Li Ling; Noh Hyeon Mi; Jeong Jung Hyun; Jang Kiwan; Shin Dong Soo;

  • 作者单位

    Hubei Univ Hubei Collaborat Innovat Ctr Adv Organochem Mat Minist Of Educ Key Lab Synth &

    Applicat Organ Funct Mol Wuhan 430062 Peoples R China;

    Hubei Univ Hubei Collaborat Innovat Ctr Adv Organochem Mat Minist Of Educ Key Lab Synth &

    Applicat Organ Funct Mol Wuhan 430062 Peoples R China;

    Pukyong Natl Univ Dept Phys Pusan 608737 South Korea;

    Pukyong Natl Univ Dept Phys Pusan 608737 South Korea;

    Changwon Natl Univ Dept Phys Chang Won 641773 South Korea;

    Changwon Natl Univ Dept Phys Chang Won 641773 South Korea;

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  • 正文语种 eng
  • 中图分类 化学;
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