TY - JOUR
T1 - Nanosecond Laser-Assisted Nitrogen Doping of Graphene Oxide Dispersions
AU - Kepić, Dejan
AU - Sandoval, Stefania
AU - Pino, Ángel Pérez del
AU - György, Enikö
AU - Cabana, Laura
AU - Ballesteros, Belén
AU - Tobias, Gerard
PY - 2017/4/19
Y1 - 2017/4/19
N2 - © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim N-doped reduced graphene oxide (RGO) has been prepared in bulk form by laser irradiation of graphene oxide (GO) dispersed in an aqueous solution of ammonia. A pulsed Nd:YAG laser with emission wavelengths in the infrared (IR) 1064 nm, visible (Vis) 532 nm, and ultraviolet (UV) 266 nm spectral regions was employed for the preparation of the N-doped RGO samples. Regardless of the laser energy employed, the resulting material presents a higher fraction of pyrrolic nitrogen compared to nitrogen atoms in pyridinic and graphitic coordination. Noticeably, whereas increasing the laser fluence of UV and Vis wavelengths results in an increase in the total amount of nitrogen, up to 4.9 at. % (UV wavelength at 60 mJ cm−2 fluence), the opposite trend is observed when the GO is irradiated in ammonia solution through IR processing. The proposed laser-based methodology allows the bulk synthesis of N-doped reduced graphene oxide in a simple, fast, and cost efficient manner.
AB - © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim N-doped reduced graphene oxide (RGO) has been prepared in bulk form by laser irradiation of graphene oxide (GO) dispersed in an aqueous solution of ammonia. A pulsed Nd:YAG laser with emission wavelengths in the infrared (IR) 1064 nm, visible (Vis) 532 nm, and ultraviolet (UV) 266 nm spectral regions was employed for the preparation of the N-doped RGO samples. Regardless of the laser energy employed, the resulting material presents a higher fraction of pyrrolic nitrogen compared to nitrogen atoms in pyridinic and graphitic coordination. Noticeably, whereas increasing the laser fluence of UV and Vis wavelengths results in an increase in the total amount of nitrogen, up to 4.9 at. % (UV wavelength at 60 mJ cm−2 fluence), the opposite trend is observed when the GO is irradiated in ammonia solution through IR processing. The proposed laser-based methodology allows the bulk synthesis of N-doped reduced graphene oxide in a simple, fast, and cost efficient manner.
KW - N-doping
KW - ammonia
KW - graphene
KW - lasers
KW - reduced graphene oxide
U2 - https://doi.org/10.1002/cphc.201601256
DO - https://doi.org/10.1002/cphc.201601256
M3 - Article
VL - 18
SP - 935
EP - 941
IS - 8
ER -