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美国加州大学Mihri Ozkan教授学术报告
发表时间:2018-11-12 阅读次数:497次

报告题目: Scalable Multifunctional Ultra-Thingraphite Sponge

报告人:Mihri Ozkan教授

报告时间:2018年11月15日 14:00

报告地点:电院群楼3-101

欢迎大家踊跃参加 !

 

SCALABLE MULTIFUNCTIONAL ULTRA-THIN GRAPHITE SPONGE

 

Mihri Ozkan

Climate Action Champion Professor

Professor of Electrical and Computer Engineering

University of California, Riverside

 

Abstract

Over the past decade, alarming consumption of earth’s resources and subsequent environmental pollution has raised major concerns. Frequent oil spills and oil tanker incidents which resulted in catastrophic consequences for marine wild life and ecosystems are evident instances and whistleblowers. To prevent further damage to the environment, novel materials and methods for immediate decontamination and purification of water as well as sustaining the scarce natural resources are most favored. Graphitic sponge materials are developed with superporous and superhydrophobic properties. The hierarchical network material can be used to clean up different types of oil, organic solvents, toxic and corrosive contaminants. I will describe a flexible chemistry scheme capable of synthesizing porous carbon scaffolds embedded with metal particles. An analysis of the growth mechanism of porous carbon structures by esterification of simple polysaccharides at low pH will be discussed. The presence of Fe nitrate during the oxidative process nucleates metal particles when annealed under a reducing atmosphere and produces an embedded Fe nanoparticle within a porous carbon matrix encapsulated by a graphitic layer. The study of these mechanisms was then applied to other metal nitrate systems which produced corresponding metal particles embedded within a porous carbon matrix. A potential mechanism by which graphitic encapsulation takes is suggested by comparison to phase separation during the growth of carbon nanotubes from catalytic metal nanoparticles. This flexible method for synthesizing porous carbon scaffolds with embedding metal nanoparticles is shown to be achievable using cheap, environmentally benign precursors which can be used for future applications toward electrochemical capacitors, oil sorption and spill recovery, and bactericidal coatings.

 

Brief Biography

Prof. Mihri Ozkan is a faculty member in the Department of Electrical and Computer Engineering at UC-Riverside. She received her Ph.D. degree in Electrical and Computer Engineering at UC-San Diego. She is “the Climate Action Champion Professor” of UC-Riverside. She believes that adaptation of electric vehicles by 2040 depends on improvements on affordability, battery storage capacity, and battery durability. In addition, she states that this requires breakthroughs in raw materials, new battery technologies, material processing and battery manufacturing. Ozkan aims to reduce the cost of anode and cathode raw materials, use new robust and safer battery architectures and achieve performance increase in Li-ion batteries by using renewable and recyclable resources. Her research is featured many times in popular news outlets such as Forbes, Guardian, New York Times, Time, BBC, TBS, Discovery News, Popular Science, Huffington Post and more. She published about 300 technical papers, 79 patent disclosures, and has 15 patents licensed by the industry. She received national and international honors including; “the National Medal for Engineering Science Award” from the Society of Engineering Science, “the Frontiers of Engineering Honor” by the National Academy of Engineering, and “the Emerging Scholar Award” by the American Association of University Women.

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