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Structure-Property Relationship in Graphene Nanoparticle Compounds

石墨烯纳米颗粒化合物的结构-性能关系

基本信息

批准号：
2003302
负责人：
Alexander Star
金额：
$ 42万
依托单位：
University of Pittsburgh
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-08-01 至 2024-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2003302&HistoricalAwards=false
关键词：
Structure Property Relationship Graphene Nanoparticle

项目摘要

Professor Alexander Star at the University of Pittsburgh is supported by the Macromolecular, Supramolecular and Nanochemistry Program in the Division of Chemistry to synthesize graphene metal nanoparticle composites and evaluate their properties and potential applications in sensing and catalysis. Graphene (sheets of carbon atoms arranged in a rigid structure that resembles chicken wire) is perforated to form an ordered array of holes. These holes then act as handles to accommodate nanoparticles. The goal behind the synthesis of this nanoparticle construction is that the decoration of holey graphene with select metallic nanoparticle dopants may act to tune the graphene electronic properties to enhance their sensing and catalytic properties. Success in achieving this objective may impact the fields of energy and environmental remediation as the research may open the way for practical applications, such as in water splitting to form hydrogen fuel and carbon dioxide use in useful chemical products. A diverse group of graduate, undergraduate, and high school students are trained as they conduct this research. The concepts of sensors and energy are incorporated in instructional videos and practical demonstrations communicated to the general public. Professor Star and his research team are working on the synthesis of holey graphene metal nanoparticle composites (GNCs) and the evaluation of their properties and potential applications in sensing and catalysis. The formation of holey graphene is accomplished with oriented covalent organic framework growth as a template followed by reactive ion etching. It is hypothesized that graphene’s band potential can be doped with a versatile range of nanoparticles to match the redox potential of specific analytes. This precise matching may enhance sensing and catalytic behavior. The holey graphene edges-nanoparticles interfaces are manipulated by varying the size and the activity of the holes and the chemical nature of the nanoparticles to tune the graphene work function. The idea is to match the work function to the redox potential of the molecular probes in both gas and aqueous environments to enhance the sensing of these probes and establish a link between sensing and catalytic behavior. Different GNCs are being synthesized and evaluated to facilitate the electrocatalytic splitting of water and to control the electrocatalytic product formation resulting from carbon dioxide reduction. Structural characterization of the composite materials is accomplished using a suite of analytical tools and electrochemical methods.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.

匹兹堡大学的Alexander Star教授在化学系大分子、超分子和纳米化学计划的支持下，合成了石墨烯金属纳米颗粒复合材料，并评估了其性能和在传感和催化方面的潜在应用。石墨烯(碳原子片排列在坚硬的结构中，类似于铁丝网)被穿孔，形成有序的孔阵列。然后，这些孔充当手柄，以容纳纳米颗粒。这种纳米颗粒结构的合成背后的目标是，用精选的金属纳米颗粒掺杂剂装饰多孔石墨烯，可以调节石墨烯的电子性质，以增强其传感和催化性能。实现这一目标的成功可能会影响能源和环境补救领域，因为这项研究可能会为实际应用开辟道路，例如在水分离形成氢燃料和二氧化碳在有用的化学产品中的使用方面。在进行这项研究时，对不同的研究生、本科生和高中生进行了培训。传感器和能源的概念被纳入教学视频和向公众传达的实际演示中。Star教授和他的研究团队正在致力于合成多孔石墨烯金属纳米颗粒复合材料(GNCs)，并对其性能进行评估，以及在传感和催化方面的潜在应用。孔道石墨烯的形成是以定向共价有机骨架生长为模板，然后进行反应离子刻蚀。据推测，石墨烯的带电势可以掺入多种纳米颗粒，以匹配特定分析物的氧化还原电势。这种精确的匹配可能会增强传感和催化行为。通过改变空穴的大小和活性以及纳米颗粒的化学性质来调节石墨烯的功函数，从而控制石墨烯边缘-纳米颗粒的界面。这个想法是将功函数与分子探针在气体和水环境中的氧化还原电位相匹配，以增强这些探针的传感，并在传感和催化行为之间建立联系。人们正在合成和评估不同的GNCs，以促进水的电催化分解，并控制二氧化碳还原产生的电催化产物的形成。复合材料的结构表征是使用一套分析工具和电化学方法完成的。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势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（11）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Photoluminescence Response in Carbon Nanomaterials to Enzymatic Degradation

DOI：
10.1021/acs.analchem.0c01380
发表时间：
2020-10-06
期刊：
ANALYTICAL CHEMISTRY
影响因子：
7.4
作者：
He, Xiaoyun;White, David L.;Star, Alexander
通讯作者：
Star, Alexander

A Carbon Nanotube Sensor Array for the Label-Free Discrimination of Live and Dead Cells with Machine Learning

DOI：
10.1021/acs.analchem.1c04661
发表时间：
2022-02-15
期刊：
ANALYTICAL CHEMISTRY
影响因子：
7.4
作者：
Liu, Zhengru;V. Shurin, Galina;Star, Alexander
通讯作者：
Star, Alexander

Heterogeneous Growth of UiO-66-NH 2 on Oxidized Single-Walled Carbon Nanotubes to Form “Beads-on-a-String” Composites

UiO-66-NH 2 在氧化单壁碳纳米管上的异质生长形成“串珠”复合材料

DOI：
10.1021/acsami.0c21509
发表时间：
2021
期刊：
ACS Applied Materials & Interfaces
影响因子：
9.5
作者：
Zeng, Zidao;Sorescu, Dan C.;White, David L.;Hwang, Sean I.;Shao, Wenting;He, Xiaoyun;Schulte, Zachary M.;Rosi, Nathaniel L.;Star, Alexander
通讯作者：
Star, Alexander

Composition and Structure of Fluorescent Graphene Quantum Dots Generated by Enzymatic Degradation of Graphene Oxide