期刊
CARBON
卷 142, 期 -, 页码 535-546出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2018.10.072
关键词
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资金
- Swedish Research Council FORMAS [2013-453]
- Swedish Research Council VR [2013-5021]
- NanoLund at Lund University
- Danish Center for Nanosafety
The composition and carbon nanostructure of soot are important parameters influencing health and climate effects, and the efficacy of soot mitigation technologies. We used laser-vaporization, electronionization aerosol mass spectrometry (or SP-AMS) to systematically investigate relationships between aerosol mass spectra, carbon nanostructure (HRTEM), and composition (thermal-optical carbon analysis) for soot with varying physicochemical properties. SP-AMS refractory black carbon concentrations (based on C-<= 5(+) clusters) were correlated to elemental carbon (r = 0.98, p < 10(-8)) and equivalent black carbon (aethalometer) concentrations. The SP-AMS large carbon (C->= 6(+), midcarbons and fullerene carbons) fraction was inversely correlated to fringe length (r = -0.97, p = 0.028) and linearly correlated to the fraction of refractory organic carbon that partially pyrolize during heating (r = 0.89, p < 10(-4)). This refractory organic carbon material was incompletely detected with conventional aerosol mass spectrometry (flash vaporization at 600 degrees C). This suggests that (SP-AMS) refractory carbon cluster analysis provides insight to chemical bonding and nanostructures in refractory carbon materials, lowcarbons (C-<= 5(+)) indicate mature soot and large carbons indicate refractory organic carbon and amorphous nanostructures related to C5- components. These results have implications for assessments of soot particle mixing state and brown carbon absorption in the atmosphere and enable novel, on-line analysis of engineered carbon nano-materials and soot characteristics relevant for climate and health. (C) 2018 The Authors. Published by Elsevier Ltd.
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