Fine particles associated with haze pollution threaten the health of over 400 million people in China.Owing to excellent non-destructive fingerprint recognition characteristics,Raman and surface-enhanced Raman scattering(SERS)are often used to analyze the composition of fine particles to determine their physical and chemical properties as well as reaction mech-anisms.However,there is no comprehensive Raman spectral library of fine particles.Fur-thermore,various studies that used SERS for fine-particle composition analysis showed that the uniqueness of the SERS substrates and different excitation wavelengths can produce a different spectrum for the same fine-particle component.To overcome this limitation,we conducted SERS experiments with a portable Raman spectrometer using two common SERS substrates(silver(Ag)foil and gold nanoparticles(Au NPs))and a 785 nm laser.Herein,we introduced three main particle component types(sulfate-nitrate-ammonium(SNA),organic material,and soot)with a total of 39 chemical substances.We scanned the solid Raman,liq-uid Raman,and SERS spectra of these substances and constructed a fine-particle reference library containing 105 spectra.Spectral results indicated that for soot and SNA,the differ-ences in characteristic peaks mainly originated from the solid-liquid phase transition;Ag foil had little effect on this difference,while the Au NPs caused a significant red shift in the peak positions of polycyclic aromatic hydrocarbons.Moreover,with various character-istic peak positions in the three types of spectra,we could quickly and correctly distinguish substances.We hope that this spectral library will aid in the future identification of fine particles.

Hui Chen;Fengkui Duan;Kebin He;Jingjing Du;Zhenli Sun;Suhua Wang

Key Laboratory of Resources and Environmental System Optimization of Ministry of Education,College of Environmental Science and Engineering,North China Electric Power University,Beijing 102206,China;State Key Joint Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084,China;State Key Laboratory of Environmental Chemistry and Ecotoxicology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;Guangdong Provincial Key Laboratory of Petrochemcial Pollution Processes and Control,School of Environmental Science and Engineering,Guangdong University of Petrochemical Technology,Maoming 525000 China

环境科学学报（英文版）

[1]Hui Chen;Fengkui Duan;Kebin He;Jingjing Du;Zhenli Sun;Suhua Wang-.Constructing a Raman and surface-enhanced Raman scattering spectral reference library for fine-particle analysis)[J].环境科学学报（英文版）,2022(08):1-13

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