Collaborative Research: Scalable Production of Metal-Organic Molecular Sieves with Optimized Gas Transport Properties

合作研究：具有优化气体传输性能的金属有机分子筛的规模化生产

• 批准号: 1561347
• 负责人: Sergey Vasenkov
• 金额: $ 13.3万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-09-01 至 2020-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1561347&HistoricalAwards=false
• 关键词: Collaborative; Research; Scalable; Production; Metal

Metal-organic molecular sieves are advanced sponge-like materials that possess internal cavities on the molecular scale and exhibit large total pore volume and surface area. The precisely defined pore sizes and surface openings in these molecular sponges only allow molecules of specific size, which is tunable, to be transported through them. It is these unique properties of metal-organic molecular sieves that find their uses in a wide range of applications including separations, catalysis, sensors, drug delivery, and sustainable energy technologies. Currently, these molecular sponges are made using precipitation from a solution. These methods are too expensive for wide commercial uses, primarily because they are not readily scalable. Here, the work aims to develop a new, large-scale production technology based on a scalable spray-drying technique to drastically reduce the fabrication costs and to improve transport properties of these materials. The spray-drying technique will allow controlling and optimizing the pore aperture sizes and pore architecture of nanoporous molecular sponges for such advanced applications. A novel measurement technique will be used to study microscale gas transport in these materials. These studies will be performed to guide the design of molecular sieves optimized with respect to their transport properties. The interdisciplinary nature of the project, spanning material design/synthesis in combination with the advanced transport studies, provide a rich research experience for high school, undergraduate and graduate students involved in the work.The main goal of the researched work is the development of an advanced scalable process for the designed construction of multi-functional/multi-structured nanoporous hybrid metal-organic framework materials and their composites exhibiting the desired transport properties. This goal will be achieved by completing the following three main objectives: 1) to develop aerosol-assisted (i.e., spray-drying) soft chemistry as a new paradigm for the large-scale synthesis of metal-organic frameworks by gaining a fundamental understanding of physico-chemical processes involved in aerosol-assisted soft chemistry, 2) to design and engineer MOF particles with unique microstructures and functionalities, and 3) to establish the relationship between structural and transport properties as well as the related catalytic performance of the resulting new materials through detailed studies of microscopic transport by a recently developed nuclear magnetic resonance technique. This fundamental research will lead to a set of design rules for the commercially-viable synthesis of multi-functional metal-organic framework materials and their composites with unique microstructures optimized for molecular transport and related catalytic performance.

金属有机分子筛是一种先进的海绵状材料，具有分子尺度上的内部空腔，并表现出大的总孔体积和表面积。这些分子海绵中精确定义的孔径和表面开口仅允许特定尺寸（可调）的分子通过它们传输。正是金属有机分子筛的这些独特性质使其在广泛的应用中得到应用，包括分离、催化、传感器、药物输送和可持续能源技术。目前，这些分子海绵是使用从溶液中沉淀而成的。这些方法对于广泛的商业用途来说过于昂贵，主要是因为它们不容易扩展。在这里，这项工作旨在开发一种基于可扩展喷雾干燥技术的新的大规模生产技术，以大幅降低制造成本并改善这些材料的运输性能。喷雾干燥技术将允许控制和优化纳米多孔分子海绵的孔径大小和孔结构，用于这种先进的应用。一种新的测量技术将被用来研究这些材料中的微尺度气体输运。进行这些研究是为了指导分子筛的设计，以优化其传输性能。该项目的跨学科性质，跨越材料设计/合成与先进的运输研究相结合，为高中提供了丰富的研究经验，本科生和研究生参与了这项工作。研究工作的主要目标是开发一种先进的可扩展的过程，用于设计构建多功能/多结构的纳米多孔混合金属-有机骨架材料及其复合材料表现出所需的传输性能。这一目标将通过完成以下三个主要目标来实现：1）开发气溶胶辅助（即，喷雾干燥）软化学作为大规模合成金属有机框架的新范例，通过获得对气溶胶辅助软化学中涉及的物理化学过程的基本理解，2）设计和工程化具有独特微结构和功能的MOF颗粒，和3）建立结构和传输性能之间的关系以及所得新材料的相关催化性能，最近开发的核磁共振技术的微观运输的详细研究。这项基础研究将为商业上可行的多功能金属有机框架材料及其复合材料的合成提供一套设计规则，这些材料具有独特的微观结构，可优化分子传输和相关催化性能。

项目成果

Potentials and challenges of high-field PFG NMR diffusion studies with sorbates in nanoporous media

• DOI: 10.1007/s10450-020-00255-y
• 发表时间: 2020-08
• 期刊: Adsorption
• 作者: Amineh Baniani;Samuel Berens;Matthew P. Rivera;Ryan P. Lively;S. Vasenkov