Large-scale uniform fabrication and morphology control of ultrafine perovskite nanocrystals
Large-scale uniform fabrication and morphology control of ultrafine perovskite nanocrystals
复制标题
超细钙钛矿纳米晶的大规模均匀制备和形貌控制
DOI：
10.1049/mnl.2018.5559
复制
发表时间：
2019
影响因子：
1.3
通讯作者：
Bi Ke
中科院分区：
文献类型：
--
作者：
He Zhengda;Hao Yanan;Bi Meihua;Guo Limin;Bi Ke
纳米材料在现代工业中发挥着越来越重要的作用，而大规模的制造和组装仍然需要解决。本报告探讨了超细钛酸钡（BT）纳米晶体的均匀制造和形态控制使用的“三甘醇溶胶”方法。通过改变反应物浓度，研究了所得溶胶的组成、Ba/Ti比、纳米晶的结构和形貌。结果表明，在低浓度（0.4- 0.8mol/L）下，得到了透明的、具有均匀BT纳米晶的溶胶。当BT浓度大于1.0mol/L时，得到了异常粗大的BT沉淀。此外，Ba/Ti比的变化进一步揭示了表面有机物对晶体尺寸和形貌的控制至关重要。这一研究有可能扩展到各种钙钛矿纳米晶的合成。
Nanomaterials are playing more and more important roles in modern industry, while the large‐scale fabrication and dispersibility still need to be addressed. This report explores the uniform fabrication and morphology control of ultrafine BaTiO3(BT) nanocrystals using a ‘TEG‐sol’ method. By varying the reactant concentration, the obtained product sols, Ba/Ti ratios, structure and morphology of the nanocrystals are investigated. The results reveal that under low concentrations (0.4–0.8 mol/L), transparent sols with uniform BT nanocrystals are obtained. Increasing the concentration to higher than 1.0 mol/L, BT precipitates with abnormal large crystals are obtained. Moreover, the Ba/Ti ratio variation further reveals that the surface organics are critical to the control of crystal size and morphology. This investigation is potential to be extended to the synthesis of various perovskite nanocrystals.