Synthetic Control over MOF Particle Growth and Surface Chemistry

MOF 颗粒生长和表面化学的综合控制

基本信息

批准号：
2114430
负责人：
Carl Brozek
金额：
$ 45万
依托单位：
University of Oregon Eugene
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-08-01 至 2025-07-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2114430&HistoricalAwards=false
关键词：
Synthetic Control over MOF Particle

项目摘要

Non-technical SummaryMembranes based on metal-organic frameworks (MOFs), which are three-dimensional (3-D) organic/inorganic compounds, attract intense interest for industrial petroleum refining and gas separations due to their exceptional tunability and synthetic diversity. For MOFs to reach widespread attraction and implementation in the industrial sector, however, researchers will be required to go beyond 3-D MOFs and develop new types of MOF nanoparticles, as they exhibit superior separation performance and generate membranes with superior stability. For the past two decades, bulk powders of MOFs occupied the focus of academic MOF research, but very recent attention has turned to preparing MOF nanoparticles and polymer composites with precise control of particle sizes. Despite preliminary demonstrations of the great potential of MOF nanoparticles, key fundamental questions remain for achieving reproducible control over MOF particle composition and for understanding how particle size and composition impact membrane performance. With this project, supported by the Solid State and Materials Chemistry program in the Division of Materials Research at NSF, Prof. Carl Brozek at the University of Oregon and his research group will investigate the chemical principles that control the precise sizes and compositions of MOF nanocrystals. Mechanistic growth models will be developed in the context of growth models established for other classes of materials so that these results inform the broad field of materials chemistry. Similarly, the synthetic techniques pursued in this proposal will influence materials design beyond MOF particles, by outlining fundamental tools for molecular control over materials across multiple size regimes. The proposed research is practically relevant to society because precise control over MOF nanocrystal sizes will open new frontiers in improved gas separation membranes for industry and the opportunity for elevating MOF application performance to becoming practically relevant. Technical Summary This project, supported by the Solid State and Materials Chemistry program in the Division of Materials Research at NSF, will investigate the fundamental growth mechanisms of metal-organic framework (MOF) particles, develop methods to control particle surface chemistry for enhancing their colloidal stability and interfacing with polymer composites, and understand the impact of size and surface composition on molecular- and charge-transport properties. Tackling this goal will require basic investigation into the parameters that dictate particle sizes, defect incorporation, and surface functionalization. Insight into controlling prenucleation crystal growth of materials in general, reproducible synthesis of MOF-based heterostructure composites, and improving the practical relevance of MOF materials will result from this research. Broader impacts of this proposal include 1) integrating these research aims into educational outreach initiatives that communicate the science of carbon capture technology to underserved students, 2) fostering interdisciplinary training programs that pairs chemistry with architecture students to design air-purification modules, 3) sponsoring industry-academia seminar series on MOF-based carbon-capture, and 4) implementing a teaching course on designing outreach initiative offered year-round to University of Oregon (UO) chemistry PhD students.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

非技术摘要基于金属有机框架 (MOF) 的膜是三维 (3-D) 有机/无机化合物，由于其卓越的可调性和合成多样性，引起了工业石油精炼和气体分离的浓厚兴趣。然而，为了使 MOF 在工业领域获得广泛的关注和应用，研究人员将需要超越 3-D MOF 并开发新型 MOF 纳米颗粒，因为它们表现出卓越的分离性能并生成具有卓越稳定性的膜。在过去的二十年里，MOF 的散装粉末占据了学术界 MOF 研究的焦点，但最近的注意力已经转向制备 MOF 纳米颗粒和精确控制粒径的聚合物复合材料。尽管初步证明了 MOF 纳米颗粒的巨大潜力，但实现对 MOF 颗粒成分的可重复控制以及了解颗粒尺寸和成分如何影响膜性能仍然存在关键的基本问题。在美国国家科学基金会材料研究部固态和材料化学项目的支持下，俄勒冈大学 Carl Brozek 教授及其研究小组将通过该项目研究控制 MOF 纳米晶体精确尺寸和成分的化学原理。。机械生长模型将在为其他类别材料建立的生长模型的背景下开发，以便这些结果为广泛的材料化学领域提供信息。同样，该提案所追求的合成技术将通过概述跨多种尺寸范围的材料分子控制的基本工具，影响 MOF 颗粒之外的材料设计。拟议的研究与社会实际相关，因为对 MOF 纳米晶体尺寸的精确控制将为工业气体分离膜的改进开辟新领域，并有机会提高 MOF 应用性能，使其变得具有实际意义。技术摘要该项目得到了 NSF 材料研究部固态和材料化学项目的支持，将研究金属有机骨架 (MOF) 颗粒的基本生长机制，开发控制颗粒表面化学以增强其胶体性能的方法。稳定性和与聚合物复合材料的界面，并了解尺寸和表面组成对分子和电荷传输特性的影响。实现这一目标需要对决定颗粒尺寸、缺陷合并和表面功能化的参数进行基本研究。这项研究将深入了解控制材料的成核前晶体生长、基于 MOF 的异质结构复合材料的可重复合成以及提高 MOF 材料的实际相关性。该提案的更广泛影响包括 1) 将这些研究目标纳入教育推广计划，向服务不足的学生传播碳捕获技术的科学知识，2) 促进跨学科培训计划，将化学与建筑系的学生配对，设计空气净化模块，3) 赞助关于基于 MOF 的碳捕获的行业-学术界研讨会系列，以及 4) 实施全年向俄勒冈大学 (UO) 化学博士生提供的设计推广计划教学课程。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

期刊论文数量（4）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Giant Redox Entropy in the Intercalation vs Surface Chemistry of Nanocrystal Frameworks with Confined Pores

有限孔纳米晶体框架插层与表面化学中的巨大氧化还原熵

DOI：
10.1021/jacs.2c12846
发表时间：
2023
期刊：
Journal of the American Chemical Society
影响因子：
15
作者：
Huang, Jiawei;Marshall, Checkers R.;Ojha, Kasinath;Shen, Meikun;Golledge, Stephen;Kadota, Kentaro;McKenzie, Jacob;Fabrizio, Kevin;Mitchell, James B.;Khaliq, Faiqa
通讯作者：
Khaliq, Faiqa

Size-Dependent Properties of Solution-Processable Conductive MOF Nanocrystals