Functional nanoporous materials: Synthesis and adsorption behavior

在1- 100nm范围内具有明确孔隙的纳米材料，如纳米孔，在环境修复，清洁工业催化，小型化电子，磁性或光学器件以及生物相容性运输系统中具有广泛的应用前景，因此受到特别关注。特别是有序介孔材料，被定义为包含2至15纳米的大通道或笼的周期性阵列的无机框架。尽管在研究这些固体方面已经进行了大量的研究工作，但在设计合成、定制功能化和表征方面仍需要进一步的改进。该项目的主要目标是设计特定的介孔杂化材料，包括具有适当结构和孔隙度的理想官能团，用于选择性吸附/分离应用，多相催化和生物技术应用。该项目遵循了我们对功能性介孔固体的合成及其吸附方法的详细表征的研究成果。本课题的研究方向是开发由无机和有机组分组成的纳米级介孔材料的制备和功能化方法，并对环境和基团的空间定位进行优化控制。重点还将放在评估特定功能化材料的性能和它们的吸附行为。有序介孔二氧化硅主机提供高稳定性和多样性的框架结构，便于控制客人的处置。根据目标性质，不同的功能化方法将被应用（例如，插入功能聚合物，后接枝与空间定位）。所得到的多孔固体的吸附特性将通过先进的气体吸附分析来研究，使用不同的探针，如氮气、氩气、二氧化碳、水，并辅以液体溶液的吸附研究。除了技术方面，该研究项目还强调对固体基质中主客体相互作用和纳米级吸附现象的基本理解。

Nanomaterials with well-defined pores in the range of 1-100 nm, e.g. nanopores, are of special interest because of wide perspective of applications in environmental remediation, clean industrial catalysis, miniaturized electronic, magnetic or optical devices, and biocompatible transport systems. Ordered mesoporous materials, in particular, are defined as inorganic frameworks containing periodic arrays of large channels or cages comprised between 2 and 15 nm. Although substantial research efforts have been directed on studying these solids, further improvements aiming at designed synthesis, tailored functionalization, and characterization are still much needed. The primary objective of this program is to design specific mesoporous hybrid materials incorporating desirable functional groups with adequate structure and porosity for selective sorption/separation applications, heterogeneous catalysis, and biotechnological applications. This program follows research efforts initiated by us on the synthesis of functional mesoporous solids and their detailed characterization by adsorption methods. The research is oriented towards developing methodologies for the preparation and the functionalization of mesoporous materials comprising inorganic and organic components assembled at the nanoscale with optimal control of environment and spatial positioning of groups. Emphasis will also be put on assessing the performance of given functionalized materials for targeted applications and their adsorption behavior. Ordered mesoporous silica hosts offer high stability and diversity in framework structure, facilitating control of the disposition of guests. Depending on the targeted properties, different functionalization approaches will be applied (e.g. insertion of functional polymers, post-grafting with spatial positioning). Adsorption properties of the resulting porous solids will be studied by advanced gas adsorption analyses using different probes e.g. nitrogen, argon, CO2 , water, supplemented with studies of adsorption from liquid solutions. In addition to the technological aspects, the research program emphasizes fundamental understanding of host-guest interactions within solid matrices and adsorption phenomena at the nanoscale.