Room temperature ethanol sensing by chemically reduced graphene oxide film

Tiwary, Punam; Chatterjee, Samiran; Singha, Shib Shankar; Mahapatra, Rajat; Chakraborty, Amit

doi:10.1016/j.flatc.2021.100317

Cited by 25 publications

(13 citation statements)

References 58 publications

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“…Lighter area indicates the presence of thin transparent few layers of T-RGO sheets while darker areas show bulk stacking of multiple T-RGO layers and they appear lumped together. 53 In the HRTEM image (Fig. 7e) well aligned T-RGO sheets are observed.…”

Section: Resultsmentioning

confidence: 90%

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Highly Responsive and Room-Temperature Operable Ethanol Gas Sensor Based on Thermally Reduced Graphene Oxide

Tripathi¹,

Chauhan²

2022

ECS J. Solid State Sci. Technol.

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We report the successful detection of ethanol among a variety of volatile organic compounds (VOCs), including isopropanol, toluene, and acetone at room temperature (RT) via a thermally reduced graphene oxide (T-RGO) based sensor. T-RGO material was prepared by thermal reduction of graphene oxide (GO) at 250°C for 20 min. The properties of as-synthesized T-RGO were elucidated by X-ray diffraction, Raman spectroscopy, FT-IR spectroscopy, scanning electron microscopy, transmission electron microscopy, atomic force microscopy, and Brunauer-Emmett-Teller (BET) techniques. The BET analysis of T-RGO revealed a mesoporous structure with specific surface area of 86.21 m2/g. The proposed T-RGO sensor was exposed to various ethanol concentrations ranging from 5 to 100 ppm and the sensor exhibited maximum response (15%) toward 100 ppm of ethanol at RT. The high sensitivity, fast response (3s)/recovery time (6s), and excellent repeatability of ethanol suggest good selectivity over other tested VOCs. The optimum operating temperature of the sensor was found to be RT (28°C). Upon exposure to different relative humidity (RH) levels, the ethanol sensing response was found to vary by 1.5% from 33% to 83% RH, indicating low dependence of humidity on the sensor performance. In addition, the sensor displayed efficient long-term stability towards ethanol at RT.

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Section: Resultsmentioning

confidence: 90%

“…7c) displayed as a layered transparent sheet with crumple silk wave like pattern. 53 Figures 7d and 7e illustrate TEM micrographs for T-RGO at lower and higher resolution (HRTEM) respectively. One can clearly see in Fig.…”

Section: Resultsmentioning

confidence: 99%

Highly Responsive and Room-Temperature Operable Ethanol Gas Sensor Based on Thermally Reduced Graphene Oxide

Tripathi¹,

Chauhan²

2022

ECS J. Solid State Sci. Technol.

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“…With an increase in humidity, the response and selectivity of the S2 sensor decreased gradually, while the response value and selectivity of the S4 sensor increased steadily, showing the good antihumidity characteristic of the S4 sensor. Tiwary et al [45] prepared a sensor for detecting ethanol at room temperature using chemically reduced graphene oxide (rGO) film. In dry air and 50% relative humidity (RH) humid air, the peak value and base value of the resistance change curve have almost no change, indicating that its moisture resistance is good.…”

Section: Introductionmentioning

confidence: 99%

“…Tiwary et al. [ 45 ] prepared a sensor for detecting ethanol at room temperature using chemically reduced graphene oxide (rGO) film. In dry air and 50% relative humidity (RH) humid air, the peak value and base value of the resistance change curve have almost no change, indicating that its moisture resistance is good.…”

Section: Introductionmentioning

confidence: 99%

Research progress on moisture resistance of gas sensors

Sun,

Shi,

Wang

et al. 2023

CLEAN Soil Air Water

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Sensors used to detect explosive, flammable, toxic, and harmful gases are in focus of research. The gas sensor can be affected by many factors in the process of use, and among the many adverse elements affecting the function of the gas sensor, humidity is the most common. With the rapid development of gas sensors, the influence of humidity on gas sensors has been paid more and more attention. To reduce the impact of humidity, many methods have been proposed. In this review, the specific impact of humidity on the function of metal‐oxide semiconductors and solid electrolyte gas sensors is summarized. Practical techniques are proposed to reduce the effect of humidity on device performance, which is of great help in improving the detection efficiency and quality of gas sensors in high‐humidity environment. The information may be valuable for expanding the application field of gas sensors.

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“…The results of this engagement are turning possible concepts suggested by the vanguard at the beginning of the graphene revolution 4 . For example, it is possible to consider enhanced composite materials [5][6][7] development, electronic devices 8 and sensors 9,10 , medical biosensors 11 , filtration membranes 12,13 , solutions applied for energy generation 14 and energy storage systems (ESS) applications [15][16][17][18] such as batteries and supercapacitors.…”

Section: Introductionmentioning

confidence: 99%

Manufacturing Free-Standing Graphene Oxide/Carbon Nanotube Hybrid Papers and Improving Electrical Conductivity by a Mild Annealing Treatment

et al. 2022

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The present work aims to evaluate the manufacturing processes of free-standing graphene oxide (GO)/reduced graphene oxide(rGO)/carbon nanotube (MWCNT) papers-like and the effect on electrical conductivities after annealing treatment. The pure GO and the hybrid papers were obtained by vacuum filtration and submitted to mild thermal annealing at 400 °C under an argon atmosphere. Analyses comparing the carbon paper-like materials before and after thermal treatment were done by thermogravimetric analysis (TGA), Raman spectroscopy, scanning electron microscopy (SEM), and electrical conductivity measurements. The characterization results show the annealing process effect on the morphology of paper materials. The GO papers and the hybrid (GO/rGO/MWCNT) exhibited good free-standing structure properties. The SEM results suggest the formation of gas void due to the thermal treatment. TGA and Raman results showed the thermal reduction and restoration of the carbon sp 2 network of the graphene oxide induced by thermal treatment. The thermal treatment was responsible for changing the almost insulator characteristic of free-standing pure GO paper, achieving an electrical conductivity of 752 S/m, and improving 45% of the free-standing hybrid carbon nanomaterials papers (GO/rGO/MWCNT) electrical conductivity, achieving the value of 1020 S/m.

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Room temperature ethanol sensing by chemically reduced graphene oxide film

Cited by 25 publications

References 58 publications

Highly Responsive and Room-Temperature Operable Ethanol Gas Sensor Based on Thermally Reduced Graphene Oxide

Highly Responsive and Room-Temperature Operable Ethanol Gas Sensor Based on Thermally Reduced Graphene Oxide

Research progress on moisture resistance of gas sensors

Manufacturing Free-Standing Graphene Oxide/Carbon Nanotube Hybrid Papers and Improving Electrical Conductivity by a Mild Annealing Treatment

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