【20th.Sept.】光催化纳米材料体系中的超快空穴动力学
日期：2018-09-20
阅读：682
题目：光催化纳米材料体系中的超快空穴动力学
报告人： 张群教授，中国科学技术大学化学物理系
时间： 9月20日 (周四) 上午10:00
地点： 化学楼A五楼518报告厅
邀请人：任吉存 教授
报告人简介：
Qun Zhang（张群教授） earned a PhD degree of chemical physics from the Univ. of Sci. & Tech. of China (USTC) in 1999. After a seven-year stint as a postdoctoral fellow and research associate at the Weizmann Institute of Science (2000–2003) and the University of British Columbia (2003–2007), he joined the USTC and Hefei National Laboratory for Physical Sciences at the Microscale (HFNL), working initially on gas-phase molecular spectroscopy & reaction dynamics (2007–2012).
Since 2012 he has been devoted to establishing from scratch an ultrafast laser laboratory and then working on condensed-phase spectroscopy & dynamics (2012–now). At present he holds a position of full professor in chemical physics at the USTC/HFNL.
In the fields of spectroscopy/dynamics & photophysics/photochemistry, he has authored 110+ research papers in peer-reviewed journals, including Nature Commun. (1), Phys. Rev. Lett. (1), J. Phys. Chem. Lett. (3), J. Am. Chem. Soc. (8), Angew. Chem. (8), and Adv. Mater. (6).
He is currently the PI of the project “Ultrafast Dynamics Characterizations of Nanostructures” (2016–2021) under the National Key R&D Program on Nano Sci. & Tech. (Gr. 2016YFA0200602) funded by the Ministry of Sci. & Tech. of China.
报告内容简介：
In this talk I will report our recent progress in the experimental investigations of photoexcited hole dynamics in photocatalytic nanomaterial systems by means of ultrafast spectroscopy.
First, we revealed the photoexcited hole transfer in a unique semiconductor–metal–graphene stack structure, which allows for efficiently harnessing charge flow for photocatalysis [1].
Second, we demonstrated a molecular co-catalysis strategy to accelerate hole transfer for enhanced photocatalytic hydrogen evolution [2].
Third, we identified the ultrafast reverse hole transfer at the interface of photoexcited methanol/g-C3N4 system, deciphering from the ultrafast dynamics perspective the fundamental reason why methanol functions as an efficient hole scavenger in photocatalytic applications [3].
References
[1] S. Bai et al., Adv. Mater. 26, 5689 (2014).
[2] W. Bi et al., Nat. Commun. 6, 8647 (2015).
[3] Z. Chen et al., Angew. Chem. Int. Ed. 57, 5320 (2018).
