Process Intensified Synthesis of Rare-Earth Doped beta-NaYF4 Nanorods toward Gram-Scale Production
Process Intensified Synthesis of Rare-Earth Doped beta-NaYF4 Nanorods toward Gram-Scale Production
复制标题
稀土掺杂 β-NaYF4 纳米棒的工艺强化合成迈向克级生产
DOI：
10.1021/acs.iecr.9b05412
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发表时间：
2019
影响因子：
4.2
通讯作者：
Chen Jian-Feng
中科院分区：
文献类型：
--
作者：
Jiao Yiran;Pu Yuan;Wang Jie-Xin;Wang Dan;Chen Jian-Feng
本文报道了在传统水热法基础上强化合成β- nayf4纳米棒的工艺。采用高重力旋转填充床（RPB）反应器加强临界核前驱体的传质和微混合。所提出的高重力RPB辅助策略易于扩展。探讨了反应条件的影响，并讨论了β- nayf4纳米棒形成的可能机理。在此基础上，通过一次批次反应制备了形貌和结构清晰的纯β相NaYF4:Gd3+/Yb3+/Er3+纳米棒。在近红外（NIR）光照射下，稀土掺杂的β- nayf4纳米棒在有机溶剂中具有高分散性和强上转换发光。在此基础上，制备了聚甲基丙烯酸甲酯纳米复合材料的半透明近红外探测卡。光敏区也可以通过照亮卡片的背面来激活，这在对齐两束光束重叠时很有用。
We reported the process intensified synthesis of β-NaYF4nanorods based on the traditional hydrothermal methods. A high-gravity rotating packed bed (RPB) reactor was used to intensify the mass transfer and micromixing of the precursors for critical nuclei. The proposed high gravity RPB assisted strategy is easy-to-perform for scale-up. The influence of reaction conditions was explored and the possible mechanism of the formative of β-NaYF4nanorods was discussed. Accordingly, over 1 g of pure β-phase NaYF4:Gd3+/Yb3+/Er3+nanorods with well-defined morphology and structure were prepared via one batch reaction. The rare-earth doped β-NaYF4nanorods are highly dispersible in organic solvents with intense upconversion luminescence under near-infrared (NIR) light irradiation. The translucent NIR detector card of nanocomposites of poly(methyl-methacrylate) and the nanoroads was fabricated accordingly. The photosensitive region can also be activated by illuminating the back of the card, which is useful when aligning two beams to overlap.