Shape and Size Controlled Synthesis of MOF Nanocrystals with the Assistance of Ionic Liquid Mircoemulsions

详细信息    查看全文

• 作者：Wenting Shang ; Xinchen Kang ; Hui Ning ; Jianling Zhang ; Xiaogang Zhang ; Zhonghua Wu ; Guang Mo ; Xueqing Xing ; Buxing Han
• 刊名：Langmuir
• 出版年：2013
• 出版时间：October 29, 2013
• 年：2013
• 卷：29
• 期：43
• 页码：13168-13174
• 全文大小：427K
• 年卷期：v.29,no.43(October 29, 2013)
• ISSN：1520-5827

文摘

In this work, the La-metal鈥搊rganic frameworks (La-MOFs) were synthesized using lanthanum(III) nitrate and 1,3,5-benzenetricarboxylic acid (BTC) in H₂O-in-1-butyl-3-methylimidazolium hexafluorophosphate (bmimPF₆), bmimPF₆-in-water, and the bicontinuous microemulsions stabilized by surfactant TX-100. The MOFs prepared were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), powder X-ray diffraction (XRD), thermal gravimetric analysis (TGA), and FT-IR methods, and the microstructures of the microemulsions in the H₂O/bmimPF₆/TX-100 system were studied by small-angle X-ray scattering (SXAS) technique. It was shown that the dispersed droplets in the water-in-bmimPF₆, bicontinuous and bmimPF₆-in-water microemulsions were spherical, lamellar, and cylindrical, respectively. The shapes of the La-MOFs synthesized were similar to that of the droplets in the corresponding microemulsions. This indicated that the morphology of MOFs could be controlled by the microstructures of the microemulsions. On the basis of the systematic experimental results, the mechanism for controlling the morphology of the MOFs was proposed.