CAS: Template Directed Synthesis of Earth Abundant Metal Oxide and Chalcogenide Nanoshells

CAS：地球丰富的金属氧化物和硫属化物纳米壳的模板定向合成

• 批准号: 2304999
• 负责人: Jingyi Chen
• 金额: $ 49.36万
• 依托单位: University of Arkansas
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2026-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2304999&HistoricalAwards=false
• 关键词: CAS; Template; Directed; Synthesis; Earth

With support from the Macromolecular, Supramolecular and Nanochemistry (MSN) Program in the Division of Chemistry (CHE) and the Established Program to Stimulate Competitive Research (EPSCoR), Professor Jingyi Chen of the University of Arkansas will study synthetic approaches to new nanostructures made of non-precious metals, and their oxides or chalcogenides. These studies aim to offer accessibility to multifunctional nanocomposite materials of earth abundant metals as alternatives to costly noble metals in various applications. The targeted nanostructures composed of earth abundant elements have the potential to be deployed in key technologies related to energy conversion, energy storage, chemical sensing, and water treatment. As part of this project, Professor Chen and her research team will provide opportunities to research students from underrepresented groups, to contribute to the training of a diverse, globally-competitive future workforce. The results from this project will be converted to educational videos for educational outreach through the “Chemistry_Rules” YouTube channel, the “Nanochemistry 101 Boot Camp,” and the annual “Science Day” event at the local Scott Family Amazeum.Hollow nanostructures have become an emerging topic of study because they outperform their solid counterparts in various applications. Their superior physicochemical properties stem from their low mass density, high porosity and large reaction surface-to-volume ratio. The proposed research aims to bridge the gap in the template-directed synthesis of earth abundant metal oxide and chalcogenide nanoshells by developing approaches to precisely control their morphology and composition at the nanoscale. The template-directed synthesis being conducted here involves a deposition-etching process using Cu nanostructures with well-defined morphology as templates. The conformational deposition of non-precious metal oxide/chalcogenide shells of 3d transition metals will be achieved through reduction-oxidation/chalcogenidation steps under temperature modulation. The control of shell composition will be accomplished by using molecular bimetallic single-source precursors. The use of Cu as templates allows it to be removed by selective etching, leaving the well-defined metal oxide/chalcogenide nanoshells. Such templated directed synthesis offers a facile means to control the thickness, shape, and composition of the nanoshells of earth abundant metal oxides and chalcogenides. In the longer term, the resulting hollow structures obtained have the potential for use in energy conversion/storage, sensing, and environmental remediation applications.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.

在化学系（CHE）的大分子，超分子和纳米化学（MSN）计划和刺激竞争研究的既定计划（EPSCoR）的支持下，阿肯色州大学的Jingyi Chen教授将研究由非贵金属及其氧化物或硫属化物制成的新纳米结构的合成方法。 这些研究旨在提供地球丰富的金属作为替代昂贵的贵金属在各种应用中的多功能纳米复合材料的可访问性。由地球丰富元素组成的目标纳米结构具有在与能量转换、能量存储、化学传感和水处理相关的关键技术中部署的潜力。作为该项目的一部分，陈教授和她的研究团队将为来自代表性不足群体的学生提供研究机会，为培养多元化，具有全球竞争力的未来劳动力做出贡献。该项目的成果将被转化为教育视频，通过“Chemistry_Rules”YouTube频道、“Nanochemistry 101靴子Camp”和当地Scott Family Amazeum的年度“Science Day”活动进行教育推广。中空纳米结构已经成为一个新兴的研究课题，因为它们在各种应用中优于固体纳米结构。它们的上级物理化学性质源于它们的低质量密度、高孔隙率和大的反应表面积与体积比。拟议的研究旨在弥合差距差距在模板导向合成地球丰富的金属氧化物和硫属化物纳米壳的开发方法，以精确控制其形态和组成在纳米尺度。在这里进行的模板定向合成涉及使用具有明确形态的Cu纳米结构作为模板的沉积-蚀刻过程。3d过渡金属的非贵金属氧化物/硫属化物壳的构象沉积将通过在温度调制下的还原-氧化/硫属化物步骤来实现。壳层成分的控制将通过使用分子筛单源前驱体来完成。使用Cu作为模板允许通过选择性蚀刻将其去除，留下良好限定的金属氧化物/硫属化物纳米壳。这种模板定向合成提供了一种控制富含地球的金属氧化物和硫属化物的纳米壳的厚度、形状和组成的简便方法。从长远来看，所获得的中空结构具有用于能量转换/存储、传感和环境修复应用的潜力。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。