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讲座速递
单位:环境科学与工程学院
报告嘉宾:Christian George教授
报告题目:Spontaneous production of OH radicals at the air-water interface: a new pathway governing the multiphase oxidation capacity
报告时间:2024年10月25日10:00
报告地点:工学三号馆208报告厅
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嘉宾介绍
Christian George教授是国际知名的大气环境化学领域专家,是国际上享有盛名、欧洲最大的催化与环境研究机构--法国里昂催化与环境研究所(CNRS-IRCELYON)副所长、一级主任研究员,同时也是欧洲科学院院士,英国皇家化学学会会士,法国国家科研中心高级研究员。Christian George教授主要致力于大气化学、界面光化学、空气质量、气溶胶物理化学、对流层多相化学等研究,近年在国际著名学术期刊Science、Nat. Commun.、PNAS、JACS、Angewandte Chemie、Chem. Rev.、Environ. Sci. Technol.等发表论文100余篇,引用3300余次,在大气化学领域拥有卓越的学术成就和广泛的国际影响力。
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报告摘要
Aerosols and clouds are key players in tropospheric chemistry. These tiny particles suspended in the air, with a radius ranging from a few nanometres to tens of micrometres, impact atmospheric composition, represent one of the largest uncertainties in climatic projections and cause millions of deaths worldwide every year. Hence, they have enormous societal and economic consequences. Nonetheless, there is still a knowledge gap preventing us from describing the chemical evolution of aerosols and clouds during their atmospheric lifetime.
Water molecules in bulk liquid are stable and inert under ambient conditions. In sharp contrast, it was very recently shown that the local orientation of water molecules at an air/water interface induces an electric field that generates spontaneous radicals in micron-sized droplets. This production does not involve any catalysts such as light or heat. It is an intrinsic property of the air/water interface, and therefore potentially ubiquitous in the troposphere.
This spontaneous interfacial oxidant formation has never been explored for its atmospheric significance. Therefore, this presentation aims to unravel the atmospheric importance of this interfacial (dark) chemistry. If oxidants (including OH radicals) are in fact spontaneously produced at the air-water interface, under atmospherically relevant concentrations, this would profoundly challenge our understanding and description of atmospheric multiphase chemistry.
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报名链接
报名链接1(博士)
人数:22人
报名时间:2024年10月24日10:00-11:00
报名链接2(硕士)
人数:178人
报名时间:2024年10月24日10:00-11:00
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注意事项
本次讲座学术条发放仅限环境学院研究生。其他参与者,无需报名。
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4-签退事项:
博士及硕士编号1-81的同学在前门排队签退;硕士编号82-178的同学在后门排队签退。
①编号在报名的小程序中查看;
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编辑 | 曾佳敏
复审 | 杨翔 蔡航新
终审 | 谭敬康 姬越蒙