57彩票

發布者:袁敏敏發布時間:2019-08-29

報告題目:Multiple Effects of Localised Surface Plasmon Resonance in Visible-light Photocatalysis

報告人:朱怀勇 教授  (澳大利亞昆士蘭科技大學) 

報告時間:2019830  星期五 上午 10:00     

報告地點:蒙民偉樓   706室 

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Abstract

Plasmonic photocatalysts have attracted recent interest due to the strong absorption of visible and ultraviolet light by plasmonic metal nanoparticles. The energy absorbed by the metal conduction electrons and the intense electric fields in proximity, created by the localized surface plasmon resonance effect, makes the crucial contribution of activating the molecules on the metal nanoparticles which facilitates chemical transformation. Alloy nanoparticle catalysts have been developed to expand the application and tune product selectivity of plasmonic catalysis. Recently we found that visible light-illuminated metal nanoparticles generate very strong electromagnetic fields around them which could be several orders stronger than the field of the incident light. The sharp field gradient also makes a force, but the ability of the force to attract molecules to the nanoparticles also depends on the specific molecule. Molecules that absorb light to be excited have a much stronger attracting force than those that do not absorb light. Thus, this provides opportunity for molecule selectivity as a light-induced process of selectively driving molecules to the metal nanoparticles can be used. These findings open up a new gate of opportunities for novel research ideas and development across various fields of work.

報告人簡介:

朱懷勇,澳大利亞昆士蘭科技大學教授。研究領域涉及新型吸附劑、光催化劑、以及陶瓷納米纖維超濾膜等應用基礎研究。2008最先報告金納米顆粒光催化劑,開創一個新領域。曾獲澳大利亞科學院J. G. Russell獎等獎勵。在國際期刊發表文章202篇,其中在國際一流化學和材料科學學術期刊JACSAngew. Chem.ChemAdv. Mater.發表文章17篇,被引用15000多次。H-index 6528次受邀在國際學術會議上做邀請報告,與澳洲,中國,比利時,美國,日本和德國同行有廣泛的科研合作。2007年至今,科研工作因三个領域的研究成果而为人瞩目。这些研究成果包括:

1) 負載的金屬納米顆粒的可見光催化研究

2)用智能吸附劑成功除去水中放射性離子的研究

3) 金屬氧化物納米纖維作爲過濾層的陶瓷膜的研究。

2018年11月被《澳大利亚人报》关于澳洲科研的特别报告列为材料化学領域的最领先者the national leader of the Field Chemical & Material Sciences (general) https://specialreports.theaustralian.com.au/1163512/