Journal
APPLIED SURFACE SCIENCE
Volume 257, Issue 21, Pages 9193-9198Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2011.05.131
Keywords
Graphene; Nitrogen doping; Defects; Structure
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Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Ballard Power Systems Inc.
- Canada Research Chair (CRC) Program
- Canada Foundation for Innovation (CFI)
- Ontario Research Fund (ORF)
- Ontario Early Researcher Award (ERA)
- University of Western Ontario
- CFI
- NRC
- CIHR
- University of Saskatchewan
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Graphene and nitrogen doped graphene have been prepared by modified Hummers' method and the following ammonia heat-treatment process, respectively. The effects of N-doping on the structure of graphene have been systematically investigated by various characterization techniques. SEM, TEM, BET, Raman and XRD analysis were used to distinguish the difference of the microstructures; and FT-IR, XPS, especially XANES were performed to elucidate the bonding information such as C-N. The effect of nitrogen doping on the structure of graphene has been obtained. More defects are present on nitrogen doped graphene as elucidated by BET, XRD, Raman, and XANES characterizations. XANES analysis also indicates that the N-doping decreases the surface oxygen-containing groups. (C) 2011 Published by Elsevier B. V.
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