演講快訊
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- 演講快訊
07.24
Microdroplet Chemistry
張立武 教授
摘要 :
This lecture focuses on microdroplet chemistry, covering the special physicochemical properties of microdroplets, their role in atmospheric aerosols, and their applications in photochemistry and energy systems. Chemical reactions have been found to be significantly accelerated in microdroplet. Aerosol microdroplets act as microreactors for important atmospheric reactions, with pH playing a significant role in regulating these processes. However, the spatial distribution of pH and chemical species within atmospheric microdroplets is still debated. To address this challenge, we present a non-invasive method based on stimulated Raman scattering microscopy to visualize the three-dimensional pH distribution within microdroplets of varying sizes. In the context of photochemistry and photocatalysis, we demonstrate that reducing microdroplet diameter significantly increases reaction rates, highlighting the importance of the air-water interface properties. Finally, we explore the enhanced efficiency of solar-driven CO2 reduction reactions mediated by microdroplets, revealing the role of the gas-liquid interface in promoting ultrafast reaction kinetics. This lecture provides insights into microdroplet chemistry and its implications in atmospheric and energy research.
學經歷 :
Prof. Liwu Zhang received his Ph.D. degree in 2009 from the Department of Chemistry at Tsinghua University, China. From 2009 to 2012, he conducted his postdoctoral research as an Alexander von Humboldt Research Fellow at Leibniz University Hannover, Germany. He further pursued postdoctoral research as a Marie Curie IEF Research Fellow at the Department of Physics, University of Cambridge, from 2012 to 2014. In 2014, he joined the Department of Environmental Science and Engineering at Fudan University as a professor and currently serves as the Associate Chair of the department. His research primarily focuses on the field of environmental chemistry. He has published over 130 scientific papers in renowned journals such as PNAS, Angew Chem, and EES, with more than 9,000 citations by other researchers. He serves as the Associate Editor of the journal "Environmental Science: Advances" by the Royal Society of Chemistry and is a board member of internationally significant journals like "Proceedings of Royal Society A" (established in 1800). He has been consistently listed among the "Top 2% Scientists Worldwide" for lifetime influence, as well as in the "2022 Top 2% Scientists Worldwide" and "Top 100,000 Scientists Worldwide" annual rankings compiled by global scholar databases.