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Nanomaterials 2017, 7(1), 12; doi:10.3390/nano7010012

Preparation of g-C3N4/Graphene Composite for Detecting NO2 at Room Temperature

1
Department of Physics, Dongguk University, Seoul 04620, Korea
2
School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China
*
Author to whom correspondence should be addressed.
Academic Editors: Xianghui Hou and Fang Xu
Received: 8 November 2016 / Revised: 18 December 2016 / Accepted: 4 January 2017 / Published: 12 January 2017
(This article belongs to the Special Issue Nanocomposite Coatings)
View Full-Text   |   Download PDF [4195 KB, uploaded 12 January 2017]   |  

Abstract

Graphitic carbon nitride (g-C3N4) nanosheets were exfoliated from bulk g-C3N4 and utilized to improve the sensing performance of a pure graphene sensor for the first time. The role of hydrochloric acid treatment on the exfoliation result was carefully examined. The exfoliated products were characterized by X-ray diffraction (XRD) patterns, scanning electron microscopy (SEM), atomic force microscopy (AFM), and UV-Vis spectroscopy. The exfoliated g-C3N4 nanosheets exhibited a uniform thickness of about 3–5 nm and a lateral size of about 1–2 µm. A g-C3N4/graphene nanocomposite was prepared via a self-assembly process and was demonstrated to be a promising sensing material for detecting nitrogen dioxide gas at room temperature. The nanocomposite sensor exhibited better recovery as well as two-times the response compared to pure graphene sensor. The detailed sensing mechanism was then proposed. View Full-Text
Keywords: graphene; g-C3N4; composite; gas sensor; room temperature graphene; g-C3N4; composite; gas sensor; room temperature
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhang, S.; Hang, N.T.; Zhang, Z.; Yue, H.; Yang, W. Preparation of g-C3N4/Graphene Composite for Detecting NO2 at Room Temperature. Nanomaterials 2017, 7, 12.

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