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Volume 21
Issue 6
10.3390/s21061958
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Article

Synthesis of Cu2O-Modified Reduced Graphene Oxide for NO2 Sensors

by
Manman Huang
1,2,
Yanyan Wang
1,2,*,
Shuyang Ying
1,2,
Zhekun Wu
1,2,
Weixiao Liu
1,2,
Da Chen
3 and
Changsi Peng
1,2
1
School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China
2
Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006, China
3
College of Electronics, Communications, and Physics, Shandong University of Science and Technology, Qingdao 266590, China
*
Author to whom correspondence should be addressed.
Sensors 2021, 21(6), 1958; https://doi.org/10.3390/s21061958
Submission received: 20 January 2021 / Revised: 22 February 2021 / Accepted: 2 March 2021 / Published: 11 March 2021
(This article belongs to the Special Issue Nanomaterials for Sensing Applications)
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Abstract

Nowadays, metal oxide semiconductors (MOS)-reduced graphene oxide (rGO) nanocomposites have attracted significant research attention for gas sensing applications. Herein, a novel composite material is synthesized by combining two p-type semiconductors, i.e., Cu2O and rGO, and a p-p-type gas sensor is assembled for NO2 detection. Briefly, polypyrrole-coated cuprous oxide nanowires (PPy/Cu2O) are prepared via hydrothermal method and combined with graphene oxide (GO). Then, the nanocomposite (rGO/PPy/Cu2O) is obtained by using high-temperature thermal reduction under Ar atmosphere. The results reveal that the as-prepared rGO/PPy/Cu2O nanocomposite exhibits a maximum NO2 response of 42.5% and is capable of detecting NO2 at a low concentration of 200 ppb. Overall, the as-prepared rGO/PPy/Cu2O nanocomposite demonstrates excellent sensitivity, reversibility, repeatability, and selectivity for NO2 sensing applications.
Keywords: reduced graphene oxide (rGO); cuprous oxide nanowires; polypyrrole; gas sensors; NO2 sensing; p-type semiconductor reduced graphene oxide (rGO); cuprous oxide nanowires; polypyrrole; gas sensors; NO2 sensing; p-type semiconductor

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MDPI and ACS Style

Huang, M.; Wang, Y.; Ying, S.; Wu, Z.; Liu, W.; Chen, D.; Peng, C. Synthesis of Cu2O-Modified Reduced Graphene Oxide for NO2 Sensors. Sensors 2021, 21, 1958. https://doi.org/10.3390/s21061958

AMA Style

Huang M, Wang Y, Ying S, Wu Z, Liu W, Chen D, Peng C. Synthesis of Cu2O-Modified Reduced Graphene Oxide for NO2 Sensors. Sensors. 2021; 21(6):1958. https://doi.org/10.3390/s21061958

Chicago/Turabian Style

Huang, Manman, Yanyan Wang, Shuyang Ying, Zhekun Wu, Weixiao Liu, Da Chen, and Changsi Peng. 2021. "Synthesis of Cu2O-Modified Reduced Graphene Oxide for NO2 Sensors" Sensors 21, no. 6: 1958. https://doi.org/10.3390/s21061958

APA Style

Huang, M., Wang, Y., Ying, S., Wu, Z., Liu, W., Chen, D., & Peng, C. (2021). Synthesis of Cu2O-Modified Reduced Graphene Oxide for NO2 Sensors. Sensors, 21(6), 1958. https://doi.org/10.3390/s21061958

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