TY - JOUR
T1 - HRTEM Study of diesel soot collected from diesel particulate filters
AU - Vander Wal, Randy L.
AU - Yezerets, Aleksey
AU - Currier, Neal W.
AU - Kim, Do Heui
AU - Wang, Chong Min
N1 - Funding Information:
RVW gratefully acknowledges support through the Universities Space Research Association (USRA) at the NASA-Glenn Research Center. Appreciation is extended to Dave Hull (NASA-Glenn) for the HRTEM imaging.
Funding Information:
A portion of the research described in the paper was performed in the Environmental Molecular Sciences Laboratory (EMSL) at the Pacific Northwest National Laboratory (PNNL). The EMSL is a national scientific user facility and supported by the US DOE’s Office of Biological and Environmental Research. PNNL is a multi-program national laboratory operated for the US Department of Energy by Battelle Memorial Institute under contract number DE-AC06-76RLO 1830. Also, DHK gratefully acknowledges the guidance and advice of Dr. Charles Peden at PNNL.
PY - 2007/1
Y1 - 2007/1
N2 - HRTEM study of several soot samples collected on Diesel Particulate Filters (DPF) under conditions relevant to practical applications of DPF technology, revealed nano-structure, to our knowledge, not reported previously for diesel soot. In particular, some of the primary particles were found to have hollow interior, and the outer shell exhibiting evidence of graphitization, with a higher crystallinity compared to the non-hollowed particles. The percentage of such particles varied between different soot samples and tentatively appeared to be related to the oxidation history of the sample. Remarkably, similar effect was not reproduced for a carbon black sample, Printex-U, suggesting that propensity to such oxidation-induced graphitization is related to the original nano-structure of the particle. These initial observations were independently confirmed for the same set of soot samples by two different HRTEM facilities, at NASA-Glenn and PNNL.
AB - HRTEM study of several soot samples collected on Diesel Particulate Filters (DPF) under conditions relevant to practical applications of DPF technology, revealed nano-structure, to our knowledge, not reported previously for diesel soot. In particular, some of the primary particles were found to have hollow interior, and the outer shell exhibiting evidence of graphitization, with a higher crystallinity compared to the non-hollowed particles. The percentage of such particles varied between different soot samples and tentatively appeared to be related to the oxidation history of the sample. Remarkably, similar effect was not reproduced for a carbon black sample, Printex-U, suggesting that propensity to such oxidation-induced graphitization is related to the original nano-structure of the particle. These initial observations were independently confirmed for the same set of soot samples by two different HRTEM facilities, at NASA-Glenn and PNNL.
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U2 - 10.1016/j.carbon.2006.08.005
DO - 10.1016/j.carbon.2006.08.005
M3 - Article
AN - SCOPUS:34248657803
SN - 0008-6223
VL - 45
SP - 70
EP - 77
JO - Carbon
JF - Carbon
IS - 1
ER -