[1]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(03):28-37.[doi:10.3969/j.issn.2095-0411.2025.03.004]
　ZHU Jiali,KONG Chengrong,YAO Shuiliang.Microstructural and compositional characteristics of soot in diesel exhaust particulate matter[J].Journal of Changzhou University(Natural Science Edition),2025,37(03):28-37.[doi:10.3969/j.issn.2095-0411.2025.03.004]
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柴油机尾气颗粒物中碳烟的微观结构和组成特性()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
第37卷
期数:
2025年03期
页码:
28-37
栏目:
环境科学与工程
出版日期:
2025-05-28

文章信息/Info

Title:
Microstructural and compositional characteristics of soot in diesel exhaust particulate matter
文章编号:
2095-0411(2025)03-0028-10
作者:
朱佳丽; 孔程荣; 姚水良
常州大学 环境科学与工程学院, 江苏 常州 213164; 石油和化工行业先进等离子体催化技术工程实验室(常州大学), 江苏 常州 213164
Author(s):
ZHU Jiali;  KONG Chengrong;  YAO Shuiliang
School of Environmental Science and Technology, Changzhou University, Changzhou 213164, China; Key Laboratory of Advanced Plasma Catalysis Engineering for China Petrochemical Industry, Changzhou University, Changzhou 213164, China
关键词:
柴油机尾气颗粒物;  碳烟颗粒;  微观结构;  含氧官能团
Keywords:
Key words:diesel exhaust particulate matter;  soot particles;  microstructure;  oxygen-containing functional groups
分类号:
X 513
DOI:
10.3969/j.issn.2095-0411.2025.03.004
文献标志码:
A
摘要:
采用多种手段,表征柴油机尾气颗粒物(DPM)中碳烟的微观结构和化学组成特性,并与原始DPM进行比较。结果表明,碳烟的形貌表现为球形碳质颗粒组成的链状团聚体,微结构中同时包含类石墨区域和缺陷区域,这与DPM结构特性保持一致。但相较于原始DPM,碳烟中初级粒子的平均粒径略有减小,微结构中类石墨区域增加,无定形区域减少。从化学组成来看,碳烟表面C元素和O元素的原子数分数分别为81.8%和16.9%,其O元素略高于DPM。碳烟表面化学官能团种类与原始DPM相同,即碳烟同时包含sp2杂化石墨碳和sp3杂化缺陷碳,具有羟基、醚类、羰基和羧基等典型含氧官能团。但是,碳烟和DPM中不同官能团的原子数分数存在差异,碳烟表面羰基和羧基的原子数分数高于DPM,而C—O基团低于DPM。
Abstract:
Abstract:For soot in diesel exhaust particulate matter(DPM), various methods were used to characterize 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. However,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 amorphous region was decreased. In terms of chemical compositions, the atomic fractions of C and O elements 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 different 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.

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备注/Memo

备注/Memo:
收稿日期: 2024-10-20。
基金项目: 江苏省自然科学基金资助项目(BK20220631); 常州大学科研启动基金资助项目(ZMF22020028)。
作者简介: 朱佳丽(1994—), 女, 江苏张家港人, 博士, 讲师。通信联系人: 姚水良(1963—), E-mail: yaos@cczu.edu.cn
更新日期/Last Update: 1900-01-01