Maximizing the Harvesting of Photogenerated Electron-Hole Pairs in Hybrid Plasmonic Nanosystems

最大化混合等离子体纳米系统中光生电子空穴对的收获

基本信息

批准号：
2304910
负责人：
Prashant Jain
金额：
$ 44.17万
依托单位：
University of Illinois at Urbana-Champaign
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：
2023-06-15 至 2026-05-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2304910&HistoricalAwards=false
关键词：
Maximizing Harvesting Photogenerated Electron Hole

项目摘要

With support from the Macromolecular, Supramolecular and Nanochemistry Program (MSN) in the Division of Chemistry, Professor Prashant Jain of the University of Illinois Urbana-Champaign is developing materials, principles, and strategies for capturing visible light from solar radiation and deploying it in a directed and energy-efficient manner to form high-value chemical bonds. A particular target is the chemical bond between nitrogen and carbon atoms found in many high-value chemicals. Such light harvesting is currently achievable by nanometer-scale particles of coinage metals; however, the conversion of light to chemical energy is inefficient and uncontrolled. Professor Jain is addressing this challenge by using oxide minerals engineered on the nanometer scale to absorb visible light and produce energetic charges that survive long enough to be used productively for chemical energy generation. Furthermore, he is pairing these light-absorbing materials with chemical agents that direct and promote the flow of charge. If successful, the research will lead to technologies for manufacturing energetic reagents, fuels, and fine chemicals using renewable power and producing no carbon emissions. In public outreach activities, Professor Jain is also promoting sustainable technologies and practices through solar energy- and electricity-powered removal of nitrate pollutants from water sources near agriculture-dominated communities. The graduate students engaged in this project are gaining valuable experience in a wide range of chemical syntheses, spectroscopic and chemical kinetic analyses, and catalysis. This project is also providing opportunities for undergraduate researchers interested in sustainable technologies.Plasmonic nanostructures allow the harvesting of light in the form of energetic charge carriers, which can in turn be deployed to accelerate or drive chemical reactions. However, harvesting of light and light-to-chemical energy conversion via this scheme remains well below the thermodynamic efficiency limit. Professor Jain is applying a newer class of plasmonic materials and hybridization strategies for maximizing the separation of photogenerated electron–hole pairs and utilizing them more efficiently and selectively for reactions such as nitrogen–carbon bond formation. Specifically, Professor Jain is employing plasmonic metal oxide nanostructures, which are anticipated to exhibit slower carrier relaxation and recombination. The other strategies involve the hybridization of plasmonic metal oxide nanostructures with polar surfaces, water-oxidation promoters, and homogeneous catalysts. The work is expected to elucidate physicochemical and materials design factors that govern carrier separation and extraction and illustrate chemical architectures and schemes that are ideally suited for the directed and efficient flow of carriers on the nanoscale. These concepts coupled with the use of non-metallic plasmonic oxide nanostructures have the potential to expand the scope and reach of plasmonic chemistry for achieving energy-relevant chemical transformations.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.

在化学系中的大分子，超分子和纳米化学计划（MSN）的支持下，伊利诺伊州Urbana-Champaign大学的Prashant Jain教授正在制定材料，原理和策略，以从太阳能辐射中捕获可见光，并以有指导的和能量的能源化学效率高高的型号来促进它。一个特定的目标是在许多高价值化学物质中发现的氮和碳原子之间的化学键。目前，通过造币金属的纳米尺度颗粒可以实现这种光收集。但是，光转换为化学能是无效且不受控制的。 Jain教授正在通过使用在纳米量表上设计的氧化物矿物来吸收可见光并产生能量充电，以生存的时间足够长，可以有效地用于化学能源，从而解决了这一挑战。此外，他将这些吸收的材料与直接和促进电荷流的化学剂配对。如果成功，这项研究将导致使用可再生能源并没有产生碳排放的技术，用于制造能源试剂，燃料和精细化学物质。在公共宣传活动中，Jain教授还通过太阳能和电动去除硝酸盐污染物从以农业为主的社区附近的水源来促进可持续的技术和实践。从事该项目的研究生正在获得多种化学合成，光谱和化学动力学分析和催化的价值经验。该项目还为对可持续技术感兴趣的本科研究人员提供了机会。质量纳米结构允许以能量荷载体的形式收集光，这又可以部署以加速或驱动化学反应。但是，通过该方案收集光和光到化学能量的转化远低于热力学效率极限。 Jain教授正在应用一类较新的塑料材料和杂交策略，以最大程度地扩展光生的电子孔对分离，并更有效，有选择地利用它们，以进行氮 - 碳键形成等反应。具体而言，Ja那教授正在采用塑料金属氧化物纳米结构，预计这些纳米结构可以用尽较慢的载体放松和重组。其他策略涉及血浆氧化金属氧化物纳米结构与极地，水氧化启动子和均匀催化剂的杂交。预计这项工作将阐明载体分离和提取的物理和材料设计因素，并说明了理想情况下适合纳米级载体的定向和有效流动的化学体系结构和方案。这些概念以及使用非金属塑料氧化物纳米结构具有扩大塑料化学的范围和覆盖范围的潜力，以实现与能源相关的化学转化。该奖项反映了NSF的法定任务，并被认为是通过使用基金会的智力和更广泛影响的评估来审查Criteria来通过评估来获得支持的珍贵的。