scholarly journals Synthesis of Cu2O-Modified Reduced Graphene Oxide for NO2 Sensors

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 1958
Author(s):  
Manman Huang ◽  
Yanyan Wang ◽  
Shuyang Ying ◽  
Zhekun Wu ◽  
Weixiao Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gas Sensing ◽  
Thermal Reduction ◽  
Oxide Semiconductors ◽  
Research Attention ◽  
Sensing Applications ◽  
Reduced Graphene ◽  
Significant Research ◽  
P Type

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.

Reduced Graphene Oxide–TiO2 Nanotube Composite: Comprehensive Study for Gas-Sensing Applications

2018 ◽  
Vol 1 (12) ◽  
pp. 7098-7105 ◽  
Author(s):  
Vardan Galstyan ◽  
Andrea Ponzoni ◽  
Iskandar Kholmanov ◽  
Marta M. Natile ◽  
Elisabetta Comini ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gas Sensing ◽  
Tio2 Nanotube ◽  
Sensing Applications ◽  
Reduced Graphene ◽  
Comprehensive Study

scholarly journals N-doped reduced graphene oxide for room-temperature NO gas sensors

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yu-Sung Chang ◽  
Feng-Kuan Chen ◽  
Du-Cheng Tsai ◽  
Bing-Hau Kuo ◽  
Fuh-Sheng Shieu
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Room Temperature ◽  
Gas Sensing ◽  
Ambient Conditions ◽  
Gas Sensitivity ◽  
Nitrogen Doped ◽  
Low Concentrations ◽  
Reduced Graphene ◽  
P Type

AbstractIn this study, we use nitrogen-doped to improving the gas-sensing properties of reduced graphene oxide. Graphene oxide was prepared according to a modified Hummers’ method and then nitrogen-doped reduced graphene oxide (N-rGO) was synthesized by a hydrothermal method using graphene oxide and NH4OH as precursors. The rGO is flat and smooth with a sheet-like morphology while the N-rGO exhibits folded morphology. This type of folding of the surface morphology can increase the gas sensitivity. The N-rGO and the rGO sensors showed n-type and p-type semiconducting behaviors in ambient conditions, respectively, and were responsive to low concentrations of NO gases (< 1000 ppb) at room temperature. The gas-sensing results showed that the N-rGO sensors could detect NO gas at concentrations as low as 400 ppb. The sensitivity of the N-rGO sensor to 1000 ppb NO (1.7) is much better than that of the rGO sensor (0.012). Compared with pure rGO, N-rGO exhibited a higher sensitivity and excellent reproducibility.

Impact of further thermal reduction on few-layer reduced graphene oxide film and its n-p transition for gas sensing

2016 ◽  
Vol 235 ◽  
pp. 241-250 ◽  
Author(s):  
Yong Zhou ◽  
Xiaogang Lin ◽  
Yukun Huang ◽  
Yongcai Guo ◽  
Chao Gao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Oxide Film ◽  
Reduced Graphene Oxide ◽  
Gas Sensing ◽  
Thermal Reduction ◽  
Reduced Graphene

scholarly journals Reduced Graphene Oxide (rGO)-Loaded Metal-Oxide Nanofiber Gas Sensors: An Overview

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1352
Author(s):  
Sanjit Manohar Majhi ◽  
Ali Mirzaei ◽  
Hyoun Woo Kim ◽  
Sang Sub Kim
Keyword(s):  
Graphene Oxide ◽  
Metal Oxide ◽  
Metal Oxides ◽  
Reduced Graphene Oxide ◽  
Gas Sensors ◽  
Gas Sensing ◽  
Reduced Form ◽  
Sensing Applications ◽  
Reduced Graphene ◽  
Electrospinning Method

Reduced graphene oxide (rGO) is a reduced form of graphene oxide used extensively in gas sensing applications. On the other hand, in its pristine form, graphene has shortages and is generally utilized in combination with other metal oxides to improve gas sensing capabilities. There are different ways of adding rGO to different metal oxides with various morphologies. This study focuses on rGO-loaded metal oxide nanofiber (NF) synthesized using an electrospinning method. Different amounts of rGO were added to the metal oxide precursors, and after electrospinning, the gas response is enhanced through different sensing mechanisms. This review paper discusses rGO-loaded metal oxide NFs gas sensors.

Enhanced gas sensing and photocatalytic activity of reduced graphene oxide loaded TiO2 nanoparticles

2021 ◽  
pp. 138897
Author(s):  
Suresh Sagadevan ◽  
J. Anita Lett ◽  
Getu Kassegn Weldegebrieal ◽  
Md Rokon ud Dowla Biswas ◽  
Won Chun Oh ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Tio2 Nanoparticles ◽  
Reduced Graphene Oxide ◽  
Gas Sensing ◽  
Reduced Graphene

scholarly journals Reduced graphene oxide for fiber-optic toluene gas sensing

2016 ◽  
Vol 24 (25) ◽  
pp. 28290 ◽  
Author(s):  
Yi Xiao ◽  
Jianhui Yu ◽  
Long Shun ◽  
Shaozao Tan ◽  
Xiang Cai ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Fiber Optic ◽  
Gas Sensing ◽  
Reduced Graphene

Thermal reduction to control the spacing in graphene oxide membranes: effect on ion diffusion and electrical conduction

RSC Advances ◽  
2016 ◽  
Vol 6 (74) ◽  
pp. 70012-70017 ◽  
Author(s):  
A. Alhadhrami ◽  
S. Salgado ◽  
V. Maheshwari
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electrical Conduction ◽  
Thermal Reduction ◽  
Electrochemical Characteristics ◽  
Ion Diffusion ◽  
Layer Spacing ◽  
Reduced Graphene ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes

Inter-layer spacing in reduced graphene-oxide membranes which modulates their ion-diffusion electrical and electrochemical characteristics is controlled by temperature of thermal reduction.

Polymer Foam-Supported Chemically Reduced Graphene Oxide Conductive Networks for Gas Sensing

2018 ◽  
Vol 18 (4) ◽  
pp. 2965-2970 ◽  
Author(s):  
Jiajia Song ◽  
Yanyan Wang ◽  
Feng Zhang ◽  
Yan Ye ◽  
Yanhua Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gas Sensing ◽  
Polymer Foam ◽  
Reduced Graphene ◽  
Chemically Reduced Graphene Oxide
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