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Near-edge x-ray absorption fine structure spectroscopy study of nitrogen incorporation in chemically reduced graphene oxide
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10.1116/1.4813058
/content/avs/journal/jvstb/31/4/10.1116/1.4813058
http://aip.metastore.ingenta.com/content/avs/journal/jvstb/31/4/10.1116/1.4813058

Figures

Image of FIG. 1.
FIG. 1.

(Color online) C 1 XPS spectra of GO, RGO samples prepared by hydrazine reduction of GO, a pyrazole standard (1,9-pyrazoloanthrone), and a pyrazoline standard (3-methyl-1-phenyl-2-pyrazoline-5-one).

Image of FIG. 2.
FIG. 2.

(Color online) Schematic depiction of the reduction of GO with hydrazine and subsequent condensation reactions that yield pyrazoline and pyrazole heterocyclic moieties.

Image of FIG. 3.
FIG. 3.

(Color online) Raman spectra of GO and RGO samples.

Image of FIG. 4.
FIG. 4.

(Color online) N 1 XPS spectra measured for GO, RGO samples prepared by hydrazine reduction of GO, a pyrazole standard (1,9-pyrazoloanthrone), and a pyrazoline standard (3-methyl-1-phenyl-2-pyrazoline-5-one).

Image of FIG. 5.
FIG. 5.

(Color online) C K-edge NEXAFS spectra of GO, RGO samples prepared by reduction of GO with hydrazine, and pyrazoline/pyrazole standard samples. The pyrazole standard (1,9-pyrazoloanthrone) is second spectrum from the bottom; whereas the pyrazoline standard (3-methyl-1-phenyl-2-pyrazoline-5-one) is the spectrum at the bottom. The spectra have been acquired at 54.7° incidence of the x-ray beam.

Image of FIG. 6.
FIG. 6.

(Color online) N K-edge NEXAFS spectra of the RGO and pyrazoline/pyrazole standard samples. The pyrazole standard (1,9-pyrazoloanthrone) is the second spectrum from the bottom; while the pyrazoline standard (3-methyl-1-phenyl-2-pyrazoline-5-one) is the spectrum at the bottom. All spectra have been acquired at 54.7° incidence of the x-ray beam.

Image of FIG. 7.
FIG. 7.

(Color online) (a) N K-edge NEXAFS spectra and (b) O K-edge NEXAFS spectra of the GO, RGO samples. Both sets of spectra have only been pre-edge normalized; the temperatures in parentheses refer to the annealing temperatures.

Tables

Generic image for table
TABLE I.

Sheet resistance measurements of GO and RGO samples.

Generic image for table
TABLE II.

XPS relative atomic concentrations of nitrogen and oxygen in GO and RGO samples.

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/content/avs/journal/jvstb/31/4/10.1116/1.4813058
2013-07-10
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Near-edge x-ray absorption fine structure spectroscopy study of nitrogen incorporation in chemically reduced graphene oxide
http://aip.metastore.ingenta.com/content/avs/journal/jvstb/31/4/10.1116/1.4813058
10.1116/1.4813058
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