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首页> 外文期刊>Applied Surface Science >Encapsulating MAl_2O_4:Eu~(2+), Dy~(3+) (M = Sr, Ca, Ba) phosphors with triethanolamine to enhance water resistance
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Encapsulating MAl_2O_4:Eu~(2+), Dy~(3+) (M = Sr, Ca, Ba) phosphors with triethanolamine to enhance water resistance

机译：用三乙醇胺封装MAl_2O_4：Eu〜（2 +），Dy〜（3+）（M = Sr，Ca，Ba）荧光粉以增强耐水性

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摘要

Traditional aluminates phosphors with persistent luminescence are chemically unstable to water or moisture. Thus, how to improve the water-resistance of these phosphors is becoming a key issue in their practical applications. In this work, a series of alkaline earth aluminate phosphors includingMAl_2O_4:Eu~(2+), Dy~(3+) (M = Sr, Ca, Ba) have been prepared by a co-precipitation synthesis and postannealing approach, using 8-hydroxyquinoline and sodium oxalate as precipitants. The samples before and after encapsulation were well characterized by means of XRPD, FESEM, FT-IR, TGA-DTG and PL techniques as well as water resistance measurements. The precipitants involved can react with Al~(3+) and Sr~(2+) (or Ca~(2+), Ba~(2+) to form complex compounds in aqueous solution, which further convert into porous phosphors by postannealing method under reducing atmosphere. Next, triethanolamine encapsulation at room temperature was conducted onto their surfaces to improve the water resistance. The results reveal that the encapsulation of aluminate phosphors with triethanolamine can effectively enhance the water resistance, and minimally affect on persistent phosphorescence.
机译：具有持续发光的传统铝酸盐磷光体在化学上对水或湿气不稳定。因此，如何提高这些荧光粉的耐水性成为其实际应用中的关键问题。在这项工作中，通过共沉淀合成和后退火方法，使用8制备了一系列碱土金属铝酸盐荧光粉，包括MAl_2O_4：Eu〜（2 +），Dy〜（3 +）（M = Sr，Ca，Ba）。 -羟基喹啉和草酸钠作为沉淀剂。通过XRPD，FESEM，FT-IR，TGA-DTG和PL技术以及耐水性测量，可以很好地表征封装前后的样品。所涉及的沉淀剂可与Al〜（3+）和Sr〜（2+）（或Ca〜（2 +），Ba〜（2+）反应在水溶液中形成络合物，并通过后退火进一步转化为多孔磷光体方法是在还原气氛下进行，然后在室温下对其表面进行三乙醇胺包封，以提高其耐水性，结果表明用三乙醇胺包封铝酸盐荧光粉可以有效增强耐水性，并且对持久性磷光的影响最小。

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  • 来源
    《Applied Surface Science》 |2011年第5期|p.1888-1893|共6页
  • 作者

    Ping Ting Ji; Xiang Ying Chen; Ye Qin Wu;

  • 作者单位

    School of Chemical Engineering, Anhui Key Laboratory of Controllable Chemistry Reaction & Material Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009,PR China;

    School of Chemical Engineering, Anhui Key Laboratory of Controllable Chemistry Reaction & Material Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009,PR China;

    School of Chemical Engineering, Anhui Key Laboratory of Controllable Chemistry Reaction & Material Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009,PR China;

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  • 正文语种 eng
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  • 关键词

    aluminate phosphors; encapsulation; triethanolamine; water resistance; co-precipitation;

    机译：铝酸盐磷光体;封装三乙醇胺耐水性共沉淀;

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