CAREER: Cationic Microporous and Layered Metal Oxides for Anion-Based Applications

该奖项旨在开发一种新型的微孔无机材料，其中材料的电荷是正的。微孔材料（例如，见http://www.bza.org/zeolites.html）在工业上极为重要，每年的全球市场为几百万吨。它们主要用于将重油转化为燃料，或软化或净化水。例如，在水软化过程中，孔隙中的钠或钾与“硬”镁或钙交换。尽管它们具有巨大的意义，但迄今为止已知的所有这些材料都是带负电荷的，而孔隙中的物质只能是阳离子。在科学上和工业上，获得一个新的类别的发现将会带来基于存在于孔隙中的阴离子的新应用。例如，阴离子污染物可以被这种材料捕获，在这个过程中释放出一种对环境无害的物质。阴离子混合物的分离，用于制造新化合物的交换，以及模板的大小和形状与材料的大小和形状互补的新催化剂。初步工作已经成功地完成了转换。我们的阳离子材料可以高容量地交换多种其他阴离子。有可能“回收”这些阴离子交换剂或吸收优先阴离子污染物，如砷酸盐。研究计划与教学计划相结合。我们将开发一系列实验室实验和讲座课程模块，研究表征这些材料的先进物理技术。目标课程范围从大一到研究生。该项目是一个高度跨学科的项目，涵盖化学、物理、材料科学和工程，将为研究生和本科生提供良好的培训。该奖项旨在开发一种合成阳离子无机微孔载体的新方法。层状和微孔金属氧化物是一类广泛应用于工业和环境过程的核心材料，但目前所有的宿主都是阴离子或中性的。本项目的重点是利用阴离子结构定向剂（SDAs）创建一类新的阳离子宿主。SDA的大小和形状将允许我们调整阳离子主体的通道大小和孔隙度。科学和工业回报的潜力是可观的，开辟了一系列可能的阴离子基应用，包括污染物的环境捕获，阴离子交换，分离和催化。阴离子SDAs的初步工作已经成功地获得了我们的第一种阳离子层状材料，这种材料高度稳定，可以高容量地交换各种其他阴离子。有可能通过反转插层来“回收”这些阴离子交换剂，或吸收其他优先阴离子污染物，如砷酸盐。根据PI过去和现在在微孔材料方面的经验，在研究计划中获得的专业知识和经验将被纳入教育计划。一系列的实验室实验和讲座课程模块，从大一到研究生的水平，将开发基于开放框架和先进的表征技术。该项目是一个高度跨学科的项目，涵盖化学、物理、材料科学和工程，将为研究生和本科生提供良好的培训。该项目将使PI在其职业生涯中对材料化学、研究和教育做出重大贡献。

This CAREER award seeks to develop a new class of microporous inorganic materials, where the charge of the material is positive. Microporous materials (see, for example, http://www.bza.org/zeolites.html) are extremely important industrially, with a global market of several million tons per year. They are used primarily to convert heavy petroleum to fuel, or to soften or purify water. In water softening, for example sodium or potassium inside the pores are exchanged with "hard" magnesium or calcium. Despite their enormous significance, all such materials known to date are negative in charge and the species in the pores can only be cationic. They would be considerable scientific and industrial interest in obtaining a new class discovery would lead to new applications based on the anions that reside in the pores. For example, anionic pollutants could be trapped by the material, releasing an environmentally benign species in the process. Separations of anionic mixtures, exchange for making new compounds, as well as new catalytic where the size and shape of the template complements that of the material. Preliminary work has been successful in making the switch. Our cationic material can exchange for a variety of other anions in high capacity. It may be possible to "recycle" these anion-exchangers or absorb priority anionic pollutants, such as arsenates. The research plan is integrated with the educational plan. A series of laboratory experiments and lecture course modules will be developed that study advanced physical techniques for characterizing these materials. The target courses range from freshman to graduate levels. This project is highly interdisciplinary, encompassing chemistry, physics, materials science and engineering, and will give excellent training to graduate and undergraduate students.This CAREER award seeks to develop a new methodology for the synthesis of cationic, inorganic microporous hosts. Layered and microporous metal oxides are a class of materials central to a wide variety of industrial and environmental processes, but currently all hosts are anionic or neutral in charge. This project focuses to create a new class of cationic hosts using anionic structure directing agents (SDAs). The size and shape of the SDA will allow us to tune the channel size and porosity of the cationic host. The potential for scientific and industrial payoff is considerable, opening up a range of possible anion-based applications, including environmental trapping of pollutants, anion-exchange, separation and catalysis. Preliminary work with anionic SDAs has been successful in obtaining our first cationic layered materials, which is highly stable and can exchange for a variety of other anions in high capacity. It may be possible to "recycle" these anion-exchangers by reversing the intercalation, or absorb other priority anionic pollutants, such as arsenates. Expertise and experience gained in the research plan will be incorporated into the educational plan, building upon the PI's past and present experience in microporous materials. A series of laboratory experiments and lecture course modules, ranging from the freshman to graduate levels, will be developed based on open-frameworks and advanced characterization techniques. This project is highly interdisciplinary, encompassing chemistry, physics, materials science and engineering, and will give excellent training to graduate and undergraduate students. The project will allow the PI to make a significant contribution to materials chemistry, research and education over the course of his career.