Structural Regulation and Electroconductivity Change of Nitrogen-Doping Reduced Graphene Oxide Prepared Using p-Phenylene Diamine as Modifier
Abstract
:1. Introduction
2. Experimental Section
2.1. Raw Materials and Reagents
2.2. Sample Preparation
2.3. Sample Characterization
3. Results and Discussion
3.1. Change of Surface Functional Groups before and after Functionalization
3.2. Layer Structure Changes at Different Ratios of X
3.3. Conjugate Structure, Electrical Conductivity Change, and Morphology
4. Conclusions
- (1)
- PPD was selected as a nitrogen source and modifier. During the reaction, GO can be reduced and doped with N. The reduction of GO as well as the type and extent of N doping can be regulated by changing the mass ratio, X. At X = 2, the N/C atomic ratio can reach 0.26, while the O/C ratio decreased from 0.43 to 0.15.
- (2)
- When X ≤ 2, the changes of relative strengths of different C species were not the same. When X > 2, the relative strength of C species followed the order: C–C/C=C > C–N > C–O–C/C–O > O–C=O > C=O. When X < 6, there were three types of N atomic configurations in NRGO-X, i.e., pyrrole N, pyridine N, and graphite carbon skeleton N. When X ≥ 6, there were only two configuration types, that is, pyridine N and graphite carbon skeleton N existing in the NRGO-X structure. The relative strength of graphite skeleton N reached the highest value only when X = 6. At other mass ratios of X, the relative strength followed the order: pyrrole N > graphite skeleton N > pyridine N.
- (3)
- With the increase of X, the layer spacing D value of NRGO-X first increased and then decreased, generally in a parabolic distribution, while the electrical conductivity increased gradually.
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Peng, T.; Sun, H.; Peng, T.; Liu, B.; Zhao, X. Structural Regulation and Electroconductivity Change of Nitrogen-Doping Reduced Graphene Oxide Prepared Using p-Phenylene Diamine as Modifier. Nanomaterials 2017, 7, 292. https://doi.org/10.3390/nano7100292
Peng T, Sun H, Peng T, Liu B, Zhao X. Structural Regulation and Electroconductivity Change of Nitrogen-Doping Reduced Graphene Oxide Prepared Using p-Phenylene Diamine as Modifier. Nanomaterials. 2017; 7(10):292. https://doi.org/10.3390/nano7100292
Chicago/Turabian StylePeng, Tiefeng, Hongjuan Sun, Tongjiang Peng, Bo Liu, and Xiaolong Zhao. 2017. "Structural Regulation and Electroconductivity Change of Nitrogen-Doping Reduced Graphene Oxide Prepared Using p-Phenylene Diamine as Modifier" Nanomaterials 7, no. 10: 292. https://doi.org/10.3390/nano7100292