Synergistic Chemical Synthesis and Self-Assembly Lead to Three-Dimensional b-Oriented MFI Superstructures with Selective Adsorption and Luminescence Properties
Synergistic Chemical Synthesis and Self-Assembly Lead to Three-Dimensional b-Oriented MFI Superstructures with Selective Adsorption and Luminescence Properties
复制标题
协同化学合成和自组装形成具有选择性吸附和发光特性的三维b取向MFI超结构
DOI：
10.1002/chem.201705329
复制
发表时间：
2018-02-26
影响因子：
4.3
通讯作者：
Xu, Yan
中科院分区：
文献类型：
--
作者：
Ma, Xiaoting;Li, Guannan;Xu, Yan
具有分层结构和定制功能的无机纳米颗粒的高阶组织对于先进材料的纳米制造至关重要。在这里，我们证明了三维 b 向 MFI 超结构可以通过协同化学合成和自组装来组织。该组织是通过对四丙基氢氧化铵 (TPAOH) 涂层的无机/细菌纤维素支架进行蒸汽处理来实现的。 TPA(+) 的作用是直接成核并介导晶体形态，导致 MFI 晶体沿晶体学 b 轴定向组装，而细菌纤维素将定向组装保持在一起，形成具有大孔隙的三维超结构。大孔 MFI 的自支撑整体材料对对二甲苯具有出色的选择性吸附能力，对挥发性有机化合物具有较高的吸附能力。掺入发光分子赋予大孔整体材料吸附可调发光的新特性，可以充当指示吸附水平的光学传感器。目前的工作为具有定制架构和多功能性的分层材料的合理组织开辟了新的空间。
Higher-order organization of inorganic nanoparticles with hierarchical architectures and tailored functionality is crucial in the nanofabrication of advanced materials. Here we demonstrate that three-dimensional b-oriented MFI superstructures can be organized by synergistic chemical synthesis and self-assembly. The organization is accomplished by vapor treatment of tetrapropylammonium hydroxide (TPAOH)-coated inorganic/bacterial cellulose scaffolds. TPA(+) acts to direct nucleation and to mediate crystal morphology leading to oriented assembly of MFI crystals along crystallographic b-axis, whereas bacterial cellulose holds the oriented assembly together forming three-dimensional superstructures with macroporosity. Self-supporting monoliths of the macroporous MFI show outstanding selective adsorption for para-xylene and high adsorption capacity for volatile organic compounds. Incorporating luminescent molecules imparts the macroporous monoliths the new property of adsorption tunable luminescence that may act as an optical sensor indicating the level of adsorption. The current work opens a novel space for rational organization of hierarchical materials with tailored architectures and multifunctionality.