Hydrothermal-assisted exfoliation of Y/Tb/Eu ternary layered rare-earth hydroxides into tens of micron-sized unilamellar nanosheets for highly oriented and color-tunable nano-phosphor films.
Hydrothermal-assisted exfoliation of Y/Tb/Eu ternary layered rare-earth hydroxides into tens of micron-sized unilamellar nanosheets for highly oriented and color-tunable nano-phosphor films.
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水热辅助将 Y/Tb/Eu 三元层状稀土氢氧化物剥离成数十微米尺寸的单层纳米片，用于高度取向和颜色可调的纳米荧光粉薄膜
DOI：
10.1186/s11671-015-0828-0
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发表时间：
2015
影响因子：
--
通讯作者：
Sun X
中科院分区：
文献类型：
--
作者：
Zhu Q;Xu Z;Li JG;Li X;Qi Y;Sun X
通过在120°C下进行水热阴离子交换，将水不溶性的油酸根阴离子（C17 H33 COO −）插入到（Y0.96TbxEu0.04-x）2（OH）5 NO3·nH 2 O（0 ≤ x ≤ 0.04）层状稀土氢氧化物（LRH）的层间，然后在甲苯中分层，成功地将结晶良好的LRH晶体剥离成数十微米级的单层纳米片。油酸根阴离子的插入导致LRH晶体的层间距极大地扩展（高达约5.2 nm），并因此导致ab平面沿着c轴的无序堆叠，并且还削弱了层间相互作用，而没有显著损害ab平面。结果，LRH晶体的厚度从约1 μ m增加到10 μm，表现出与在水中的蒙皂石粘土中观察到的行为相似的行为。通过旋涂法在石英衬底上制备了（Y0.96TbxEu0.04-x）2 O3（0 ≤ x ≤ 0.04）纳米氧化物薄膜，并在800°C下退火，得到了高度[111]取向、厚度约为100 nm的氧化物薄膜。在266 nm的紫外激发下，氧化物透明薄膜表现出明亮的发光，通过将Tb 3+含量从x = 0增加到0.04，颜色可调的发射从红色到橙子、黄色，然后是绿色。本文的在线版本（doi：10.1186/s11671-015-0828-0）包含补充材料，可供授权用户使用。
Efficient exfoliation of well-crystallized (Y0.96TbxEu0.04-x)2(OH)5NO3 · nH2O (0 ≤ x ≤ 0.04) layered rare-earth hydroxide (LRH) crystals into tens of micron-sized unilamellar nanosheets has been successfully achieved by inserting water insoluble oleate anions (C17H33COO−) into the interlayer of the LRH via hydrothermal anion exchange at 120°C, followed by delaminating in toluene. The intercalation of oleate anions led to extremely expanded interlayer distances (up to approximately 5.2 nm) of the LRH crystals and accordingly disordered stacking of the ab planes along the c-axis and also weakened interlayer interactions, without significantly damaging the ab plane. As a consequence, the thickness of the LRH crystals increased from approximately 1 to 10 μm, exhibiting a behavior similar to that observed from the smectite clay in water. Highly [111]-oriented and approximately 100-nm thick oxide films of (Y0.96TbxEu0.04-x)2O3 (0 ≤ x ≤ 0.04) have been obtained through spin-coating of the exfoliated colloidal nanosheets on quartz substrate, followed by annealing at 800°C. Upon UV excitation at 266 nm, the oxide transparent films exhibit bright luminescence, with the color-tunable emission from red to orange, yellow, and then green by increasing the Tb3+ content from x = 0 to 0.04. The online version of this article (doi:10.1186/s11671-015-0828-0) contains supplementary material, which is available to authorized users.
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影响因子：
8.6
作者：
McIntyre, Laura J.;Jackson, Lauren K.;Fogg, Andrew M.
通讯作者：
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影响因子：
1.7
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影响因子：
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作者：
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影响因子：
2.3
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影响因子：
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作者：
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通讯作者：
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