NDLI: The use of heterogeneous chemistry for the characterization of functional groups at the gas/particle interface of soot from a diesel engine at a particular running condition

Content Provider	Springer Nature Link
Author	Tapia, A. Salgado, M. S. Martín, M. P. Sánchez Valdepeñas, J. Rossi, M. J. Cabañas, B.
Copyright Year	2014
Abstract	Two gases, O$_{3}$ and NO$_{2}$, were selected to probe the surface of a diesel fuel combustion aerosol sample, diesel soot, and amorphous carbon nanoparticles (PRINTEX XE2-B) using heterogeneous (i.e., gas-surface reactions). The gas uptake to saturation of the probes was measured under molecular flow conditions using a Knudsen flow reactor in order to quantify and characterize surface functional groups. Specifically, O$_{3}$ and NO$_{2}$ are used for the titration of oxidizable groups. Diesel soot samples interacted with the probe gases to various extents which points to the coexistence of different functional groups on the same aerosol surface such as reduced groups. The carbonaceous particles displayed significant differences: PRINTEX XE2-B amorphous carbon had a significantly lower surface functional group density of both total and strongly reducing groups despite its significantly larger internal surface area, compared to diesel soot. The uptake kinetics of the gas-phase probe molecules (uptake probabilities) were also measured in order to obtain further information on the reactivity of emitted soot aerosols in order to enable the potential prediction of health effects.
Starting Page	4863
Ending Page	4872
Page Count	10
File Format	PDF
ISSN	09441344
Journal	Environmental Science and Pollution Research
Volume Number	22
Issue Number	7
e-ISSN	16147499
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-05-08
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Surface composition Interfacial properties Diesel soot Amorphous carbon PRINTEX XE2-B, O$_{3}$, NO$_{2}$ O$_{3}$ NO$_{2}$ Uptake coefficients Heterogeneous reactions Environment Environmental Chemistry Ecotoxicology Environmental Health Atmospheric Protection/Air Quality Control/Air Pollution Waste Water Technology Water Pollution Control Water Management Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine

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