Cesium-Catalyzed Restructuring of Amorphous Nanoporous Carbon into Well-Ordered Fullerene-Like Nanodomains: A Soft Chemical Transition of a Solid from Disorder to Order

铯催化将无定形纳米多孔碳重组为有序的类富勒烯纳米域：固体从无序到有序的软化学转变

• 批准号: 0074649
• 负责人: Henry Foley
• 金额: $ 30万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-15 至 2003-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0074649&HistoricalAwards=false
• 关键词: Cesium; Catalyzed; Restructuring; Amorphous; Nanoporous

AbstractProposal Title: Cesium-Catalyzed Restructuring of Amorphous Nanoporous Carbon into Well-Ordered Fullerene-Like Nanodomains: A Soft Chemical Transition of a Solid from Disorder to OrderProposal Number: CTS-0074649Principal Investigator: Henry FoleyInstitution: Pennsylvania State University The goal of this proposal is to investigate a low temperature process for converting amorphous carbons into more ordered structures. In this work the PIs will continue the investigation of their discovery that elemental cesium catalyzes the conversion of non-graphitizing porous carbon and carbon fibers to forms such as intercalated graphite and tubular, nested polyhedral structures. One objective of the proposal is to understand the reaction through kinetic measurements and electronic structure calculations on model systems. A second objective is to extend this process to other alkali metal catalysts and other forms of carbon. A combination of ultra high vacuum studies and ex situ techniques is proposed; these studies may suggest other routes to carbon ordering. If electron transport is responsible for the transformation, processing with low-energy electrons may provide a similar structural enhancement. The near-edge x-ray absorption spectroscopy experiments are intended to provide the needed insights into the siting of cesium in the structures. The materials to be studied, nanostructured carbons, offer potential applications in a wide range of areas. A low temperature route to such materials would represent a major accomplishment of great potential significance. A selective, controllable route to produce nanotubes might make their widespread application feasible.

摘要提案标题：铯催化无定形纳米多孔碳重组为有序富勒烯样纳米结构：固体从无序到有序的软化学转变提案编号：CTS-0074649主要研究员：亨利福利机构：宾夕法尼亚州立大学本提案的目标是研究将无定形碳转化为更有序结构的低温过程。 在这项工作中，PI将继续研究他们的发现，即元素铯催化非石墨化多孔碳和碳纤维转化为插层石墨和管状嵌套多面体结构等形式。 该提案的一个目标是通过对模型系统的动力学测量和电子结构计算来了解反应。 第二个目的是将该方法扩展到其他碱金属催化剂和其他形式的碳。 超高真空研究和非原位技术的组合，提出了这些研究可能会建议其他途径碳排序。 如果电子传输是造成转变的原因，那么用低能电子处理可以提供类似的结构增强。 近边X射线吸收光谱实验的目的是提供所需的洞察到铯的结构中的位置。 待研究的材料，纳米结构碳，在广泛的领域提供潜在的应用。 低温路线这种材料将是一个重大的成就，具有巨大的潜在意义。 选择性、可控的纳米管生产路线可能使其广泛应用成为可能。