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Synthesis of water-dispersible, plate-like perovskites and their core-shell nanocrystals

机译:合成水分散,板状钙酸盐及其核壳纳米晶体

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摘要

Shape-controlled halide perovskite nanocrystals are attractive as an emerging functional material; however, these nanocrystals are prepared using organic solvents containing alkylamines and there are few reports on the synthesis of water-dispersible halide perovskite nanocrystals. We report a simple method to prepare water-dispersible, plate-like perovskite nanocrystals by mixing a long-chain amidoamine derivative (C18AA) and potassium tetrachloropalladate (K2PdCl4) in water. The obtained nanocrystals have a 2D layered perovskite structure represented by the chemical formula (C18AAH(2))PdCl4. Furthermore, because seed-mediated growth is useful for preparing shape-controlled nanocrystals, such as rods, plates, wires and cubes, we used the water-dispersible (C18AAH(2))PdCl4 nanocrystals as seeds to grow (C18AAH(2))PdCl4@Pt core-shell nanocrystals. The core-shell nanocrystals have rough surfaces due to the deposition of Pt on the (C18AAH(2))PdCl4 seeds. In addition, plate-like (C18AAH(2))PdCl4@Au core-shell nanocrystals were easily obtained using this seed-mediated growth method.
机译:形状控制的卤化物钙钛矿纳米晶体作为新出现的功能材料具有吸引力;然而,这些纳米晶体使用含有烷基胺的有机溶剂制备,并且还有很少有关于水分散性卤化物钙钛矿纳米晶体的合成的报道。我们通过将长链酰胺胺衍生物(C18AA)和四氯钯(K2PDCl4)混合在水中,通过将长链酰胺胺衍生物(C18AA)和四氯酰钾(K2PDCl4)混合来报告一种简单的方法来制备水分散性的板状钙钛矿纳米晶。所得纳米晶体具有由化学式(C18AAH(2))PDCl4表示的2D层状钙钛矿结构。此外,因为种子介导的生长可用于制备形状控制的纳米晶体,例如棒,板,电线和立方体,所以我们使用水分散性(C18AAH(2))PdCl4纳米晶作为种子生长(C18AAH(2)) Pdcl4 @ Pt核心 - 壳纳米晶体。由于PT的沉积(C18AAH(2))PDCl4种子沉积,核 - 壳纳米晶体具有粗糙的表面。另外,使用这种种子介导的生长方法容易获得板状(C18AAH(2))PDCl4 //核 - 壳纳米晶体。

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  • 来源
    《RSC Advances》 |2020年第10期|共6页
  • 作者单位

    Tokyo Univ Sci Dept Ind Chem Shinjuku Ku 1-3 Kagurazaka Tokyo 1628601 Japan;

    Tokyo Univ Sci Dept Ind Chem Shinjuku Ku 1-3 Kagurazaka Tokyo 1628601 Japan;

    Tokyo Univ Sci Dept Ind Chem Shinjuku Ku 1-3 Kagurazaka Tokyo 1628601 Japan;

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  • 正文语种 eng
  • 中图分类 化学;
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