常州大学学报（自然科学版）2025，Vol.37Issue(3)：28-37,10.DOI:10.3969/j.issn.2095-0411.2025.03.004
柴油机尾气颗粒物中碳烟的微观结构和组成特性
Microstructural and compositional characteristics of soot in diesel exhaust particulate matter
摘要
Abstract
For soot in diesel exhaust particulate matter(DPM),various methods were used to charac-terize its intrinsic microstructure and chemical compositions.The characterization data of both DPM and soot were compared.The results showed that the morphology of soot was a chain-like aggregate composed of many spherical carbonaceous particles,whose microstructure contained both graphite-like and defective structures.This feature was consistent with the structural feature of DPM.How-ever,compared with pristine DPM,the average particle size of primary particles in soot was slightly reduced.What's more,the graphitic-like region in its microstructure was increased,while the amor-phous region was decreased.In terms of chemical compositions,the atomic fractions of C and O ele-ments on soot surface were approximately 81.8％and 16.9％,respectively.Soot's oxygen atomic fraction was slightly higher than that of DPM.In addition,the types of chemical functional groups on soot surface were the same as those of DPM.Namely,soot contained both sp2-hybridized graphitic carbon and sp3-hybridized defective carbon,as well as some typical oxygen-containing functional groups,such as hydroxyl,ether,carbonyl and carboxyl groups.However,the atomic fractions of dif-ferent functional groups of these two samples were different.The atomic fractions of carbonyl and carboxyl groups on soot surfaces were higher than those on DPM,but the atomic fraction of C—O groups on soot was lower than that on DPM.关键词
柴油机尾气颗粒物/碳烟颗粒/微观结构/含氧官能团Key words
diesel exhaust particulate matter/soot particles/microstructure/oxygen-containing func-tional groups分类
环境科学引用本文复制引用
朱佳丽,孔程荣,姚水良..柴油机尾气颗粒物中碳烟的微观结构和组成特性[J].常州大学学报（自然科学版）,2025,37(3):28-37,10.基金项目
江苏省自然科学基金资助项目(BK20220631) （BK20220631）
常州大学科研启动基金资助项目(ZMF22020028). （ZMF22020028）
