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J Phys Chem A

Title:		Influence of combustion conditions on hydrophilic properties and microstructure of flame soot
Author(s):		Han C; Liu Y; Liu C; Ma J; He H;
Address:		"Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China"
Journal Title:		J Phys Chem A
Year:		2012
Volume:		20120412
Issue:		16
Page Number:		4129 - 4136
DOI:		10.1021/jp301041w
ISSN/ISBN:		1520-5215 (Electronic) 1089-5639 (Linking)
Abstract:		"Previous studies suggest that structure and reactivity of soot depend on combustion conditions like the fuel/oxygen ratio and nature of fuels. However, the essence of how combustion conditions affect physical and chemical properties of soot is still an open question. In this study, soot samples were prepared by combusting toluene, n-hexane, and decane under controlled conditions, and their hydrophilic properties, morphology, microstructure, content of volatile organic compounds, and functional groups were characterized. The hydrophilicity of n-hexane and decane flame soot increased with decreasing fuel/oxygen ratio, while it almost did not change for toluene flame soot. Fuel/oxygen ratio had little effect on the morphology of aggregates and the graphite crystallite size. The primary particle size and the content of volatile organic compounds on soot decreased with decreasing fuel/oxygen ratio. Less hydrophobic groups (C-H) and more hydrophilic groups (C horizontal lineO) were observed on lean n-hexane and decane flame soot than that on the corresponding rich flame soot. Volatile organic compounds had little effect on the hydrophilicity of soot while the hydrophilicity correlated linearly with the ratio of C horizontal lineO content to C-H content. The hydrophilic functional groups were found to be mainly located at graphene layer edges and on surface graphene layers in soot"
Keywords:
Notes:		"PubMed-not-MEDLINEHan, Chong Liu, Yongchun Liu, Chang Ma, Jinzhu He, Hong eng 2012/03/31 J Phys Chem A. 2012 Apr 26; 116(16):4129-36. doi: 10.1021/jp301041w. Epub 2012 Apr 12"