报告题目：Plasmon-Mediated Surface Chemistry for Solar Photocatalysis
报告人：W. David Wei 博士 美国佛罗里达大学
报告时间：6月30日（星期二）16:00
报告地点：卢嘉锡楼202
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2015.6.25
Plasmon-Mediated Surface Chemistry for Solar Photocatalysis
W. David Wei, Ph.D.
Department of Chemistry and Center for Nanostructured Electronic Materials,
University of Florida, United States, wei@chem.ufl.edu
Using sunlight to facilitate and promote valuable chemical reactions is an ideal solution to the challenge of meeting future energy demands. Our group aims to address fundamental questions concerning surface plasmon resonance (SPR)-mediated interfacial electron transfer (ET) and photothermal heatingin order to develop new materials and strategies for efficiently converting solar energy to chemical energy. In this talk,I will show how weunambiguously reveal the mechanics of plasmon-mediated electron transfer (PMET) in Au/TiO2 heterostructures under visiblelight (λ > 515 nm) during in situ operation. I will further discuss how we directly probe the relaxation dynamics and energetics of the transferred “effective hot electrons” that participate in photocatalytic reactions.I will explore some strategies for manipulating “hot electrons” for the rational design and construction of a new class of multi-component solar photocatalysts for efficiently producing H2 from water. Finally,I will touch on our recent effort to use SPR-mediated photothermal effectsto synthesize hybrid bimetallic nanomaterials and then use these nanomaterials to oxidize CO in the presence of visible light.
References
(1) B. C. Sweeny, K. Qian, J. S. Duchene, J. Qiu, A. C. Johnston-Peck, D. Su, E. A. Stach and W. D. Wei, “Plasmon-Driven CO Oxidation in Au-SrTiO3 Nanostructures at Room Temperature,”Angewandte Chemie International Edition, in revision, 2015
(2) K. Qian, B. C. Sweeny, A. C. Johnston-Peck, W. Niu, J. O. Graham, Y. Wang, M. H. Engelhard, D. Su, E. A. Stach and W. D. Wei, “Surface Plasmon-Driven Water Reduction: Gold Nanoparticle Size Matters,” JACS, 136 (28), 9842-9845, 2014
(3) J. Qiu, and W. D. Wei, “Plasmon-Mediated Photothermal Chemistry,” Feature Article, Journal of Physical Chemistry, 118(36), 20735-20749, 2014. (Cover, September 11, issue 36)
(4) J. S. Duchene, B. C. Sweeny, A. C. Johnston-Peck, D. Su, E. A. Stach and W. D. Wei, “Prolonged Hot Electron Dynamics in Plasmonic-Metal/Semiconductor (Au/TiO2) Heterostructures,” Angewandte Chemie International Edition, 53 (30), 7887-7991, 2014
(5) J. Qiu, Y. Wu, Y. Wang, M. H. Engelhard, L. McElwee-White, and W. D. Wei, “Surface Plasmon Mediated Chemical Solution Deposition of Gold Nanoparticles on a Nanostructured Silver Surface at Room Temperature,” JACS, 135, 38-41, 2013
