Hydroquinone-modified Mn4+-activated fluoride red phosphors with improved water-resistance
Hydroquinone-modified Mn4+-activated fluoride red phosphors with improved water-resistance
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氢醌修饰的Mn4激活氟化物红色荧光粉具有改进的耐水性
DOI：
10.1016/j.colsurfa.2023.130954
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发表时间：
2023-03
期刊：
影响因子：
--
通讯作者：
Mingmei Wu
中科院分区：
文献类型：
--
作者：
Feilong Liu;Yingyuan Chen;Bojana Milićević;Chunyan Jiang;Senchuan Huang;Lei Zhou;Jianbang Zhou;Mingmei Wu
采用亲水性对苯二酚（HQ）对K2 SiF 6：Mn ~（4+）（KSFM）进行表面改性，可显著提高KSFM的耐水性。结果表明，由于KSFM中的氟与HQ中的氢之间存在氢键，因此KSFM与HQ之间在界面上存在较强的相互作用。经HQ改性的KSFM（记为KSFM HQ）在水中浸泡336 h后，其相对发光强度保持在初始值的99.7%，明显高于KSFM的38.0%。KSFM-HQ的高耐水性可能是通过两种机制实现的：KSFM晶体表面的深棕色锰（由于[MnF 6]2−的水解）原位分解，从而形成更具保护性的无Mn 4+层。该方法有效地结合了浸入水中之前透明有机材料（在此为HQ）的优点和浸入水中之后表面上无机材料（在此为K2 SiF 6）的持久防潮性。通过使用HQ处理的K2 GeF 6：Mn 4+（KGFM）作为另外的实例，进一步证实了HQ负载在湿敏氟化物磷光体上的重要性。这一策略为开发具有高发光稳定性的耐水Mn 4+掺杂氟化物荧光粉提供了一种独特的方法，该荧光粉可用于水性荧光防伪油墨甚至在高湿度下工作的温WLED。
A facile strategy to modify the surface of K2SiF6:Mn4+(KSFM) with commercially available hydrophilic hydroquinone (HQ) has been developed and waterproof stability (moisture resistance) of the KSFM has been significantly improved. It has been demonstrated that there are strong interactions between KSFM and HQ on the interface due to the hydrogen bonds of fluorine in KSFM with hydrogen in HQ. The relative luminous intensity of HQ-modified KSFM (denoted as KSFM-HQ) remained 99.7% of its initial value after immersion in water for 336 h, remarkable higher than that of KSFM which remained only 38.0%. It is proposed that the high water resistance of KSFM-HQ is achievedviatwo possible mechanisms:in situdecomposition of dark brown manganese (owing to the hydrolysis of [MnF6]2−) on the KSFM crystal surface and consequently the formation of a more protective Mn4+-free layer. The process effectively combines the advantages of transparent organic materials (herein HQ) before immersion in water and durable moisture resistance of inorganic materials (herein K2SiF6) on surface after immersion in water. The importance of HQ loading on moisture-sensitive fluoride phosphors has been further confirmed by using HQ-treated K2GeF6:Mn4+(KGFM) as an additional example. This strategy provides a one-of-a-kind way to the development of water-resistant Mn4+-doped fluoride phosphors with high luminous stability for potential applications in water-borne fluorescent anti-counterfeiting ink and even warm WLEDs operating in high humidity.
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影响因子：
--
作者：
Yongjin Wang;Xiao Gong
通讯作者：
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影响因子：
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