China is currently facing severe atmospheric particulate matter pollution. Atmospheric particulate matter not only affects climate radiation in the troposphere through direct scattering or absorption of sunlight, but also provides an important platform for the non-homogeneous transformation and evolution of gaseous pollutants, making the formation mechanism of regional atmospheric pollution extremely complex, which can change the atmospheric chemical balance and have a significant impact on the distribution, composition, toxicity and even climate change of atmospheric aerosols. As a result, multiphase reactions at their surfaces, especially photochemical reactions, are at the forefront of atmospheric environmental science research. The group has been exploring environmental photochemistry for many years and has achieved a series of results on the photochemical formation mechanism of atmospheric particulate matter, photochemical transformation and degradation of pollutants, which have been published in Angew Chem Int Ed, Cell Rep Phys Sci, EST and other journals. Environmental particulate pollution (aerosols, microplastics, microorganisms, etc.) is a serious risk to human health. Characterisation of micro- and nano-sized particulate matter is crucial. Recent years have seen continued research in the detection and imaging of environmental particulate pollutants, including the implementation of stimulated Raman imaging of the three-dimensional chemical composition and mixing state of single-particle aerosols (Small Methods , 2019, 1900600), surface-enhanced Raman detection of single-particle aerosols (EST, 2017, 51, 6260; Analytical Chemistry, 2019, 91, 21: 13647), and surface-enhanced Raman detection of nanoplastics ( EST, 2020, 54: 15594), etc. Multi-phase and non-homogeneous chemical reactions are one of the main drivers of explosive growth of secondary particulate matter. In the Beijing-Tianjin-Hebei region of China, where pollutant emissions are intense in winter, high concentrations of atmospheric aerosols provide an important medium for multi-phase and and non-homogeneous chemical reactions of atmospheric trace gases, and pollution precursors can further cause serious atmospheric environmental impacts in the region through multi-phase non-homogeneous chemical transformations and mutual coupling. At present, the multiphase and non-homogeneous physicochemical processes of pollutants, the migration and transformation patterns between different phases, and the mechanisms of multiphase and non-homogeneous reactions of pollutants in the formation of haze are still unclear, and revealing the potential and important atmospheric chemical mechanisms can effectively curb the pollution amplification process and provide theoretical reference for precise pollution prevention and control. The atmospheric chemistry of our group is mainly concerned with atmospheric chemical dynamics, aerosol physicochemistry, atmospheric photochemistry, and complex pollution formation mechanisms. The direction is dedicated to making breakthroughs in the deep characterisation of aerosol physicochemical properties and haze pollution formation mechanisms. |