One-step green approach for synthesizing highly ordered pillaring materials via ultrafast transportation
One-step green approach for synthesizing highly ordered pillaring materials via ultrafast transportation
复制标题
通过超快传输合成高度有序支柱材料的一步式绿色方法
DOI：
10.1016/j.clay.2016.02.009
复制
发表时间：
2016
影响因子：
5.6
通讯作者：
Jian Lu
中科院分区：
文献类型：
--
作者：
Qing-Qing Hao;Yong-Hong Song;Bing-Sen Zhang;Huan-Huan Yang;Jian-Gang Chen;Yong-Hua Zhao;Zhao-Tie Liu;Yun-Hang Hu;Zhong-Wen Liu;Wei Wang;Dang-Sheng Su;Jian Lu
在层状材料中嵌入客体分子是开发多功能杂化纳米复合材料和多孔材料的重要策略。金属氧化物插层多孔粘土异质结构（PCH）独特的介孔结构和固有的酸性使其成为一种很有前途的催化材料。针对目前合成PCH工艺复杂、结构控制困难的特点，提出了以超临界CO2（scCO2）为介质，以蒙脱土（Mt）为基质，十六烷基三甲基溴化铵（SDA）为结构导向剂的一步法合成方法。在这种简单而高效的方法中，scCO2的高扩散性确保了阳离子SDA通过离子交换容易进入Mt的层间空间，从而消除了SDA在scCO2中的高溶解度的要求。结果表明，SDA和氧化物前驱体在Mt层间空间的共同组装导致了高有序的PCH。此外，这种独特的方法为合成多功能插层化合物提供了一种通用技术。
The intercalation of guest molecules into layered materials is an important strategy to develop multifunctional hybrid nanocomposites and porous materials. The unique mesoporous structure and the intrinsic acidity of metal oxide intercalated porous clay heterostructure (PCH) make it a promising catalytic material. In contrast to the current synthesis methods of PCH that have complex procedures and structure-controlling difficulties, a novel one-step approach with supercritical CO2(scCO2) as medium was invented using montmorillonite (Mt) as the host matrix and cetyltrimethylammonium bromide as the structure-directing agent (SDA). In this simple and efficient approach, the high diffusivity of scCO2ensures the facile transportation of cationic SDA into the interlayer space of Mt via ion exchange, which eliminates a requirement for the high solubility of a SDA in scCO2. As a result, the co-assembly of the SDA and the oxide precursor controlled in the interlayer space of Mt leads to the highly ordered PCH. Furthermore, this unique approach provides a general technique to synthesize multi-functional intercalation compounds.