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讲准字226号:局部表面等离子体共振在可见光光催化中的多重效应

发布时间:2019-08-30|浏览次数:

讲座报告主题:局部表面等离子体共振在可见光光催化中的多重效应
专家姓名:朱怀勇
日期:2019-09-02 时间:10:00
地点:化工楼212报告厅
主办单位:化学化工极速10分彩注册  

主讲简介:朱怀勇,澳大利亚籍华人,1994年获比利时安特卫普大学博士学位,现为昆士兰科技大学教授,中科院“海外评审专家”。曾获澳大利亚科极速10分彩注册J. G. Russell奖等奖励。研究领域涉及新型吸附剂、光催化剂、以及陶瓷纳米纤维超滤膜等应用基础研究。2008年最先报告金纳米颗粒光催化剂,开创了一个新领域。在国际期刊发表文章202篇, 其中在国际一流化学和材料科学学术期刊美国化学会志、德国应用化学、化学(Chem)、先进材料发表文章17篇,被引用15000多次。H-index 65.28次。受邀在国际学术会议上做邀请报告,与澳洲、中国、比利时、美国、日本和德国同行有广泛的科研合作。2018年11月被《澳大利亚人报》PK10技巧关于澳洲科研的特别报告列为材料化学领域的最领先者。

主讲内容: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.


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