A facile microwave route for fabrication of NiO/rGO hybrid sensor with efficient CO2 and acetone gas sensing performance using clad modified fiber optic method

Shanavas, S.; Ahamad, Tansir; Alshehri, Saad M.; Acevedo, R.; Anbarasan, P. M.

doi:10.1016/j.ijleo.2020.165970

Cited by 36 publications

(16 citation statements)

References 37 publications

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“…The peak around 1070 cm -1 observed due to alkoxy and epoxy carbon-oxygen stretching vibration indicates binary nanocomposite formation of NiO@rGO [13] .…”

Section: Williamson and Hall Equationmentioning

confidence: 97%

“…XRD patterns of rGO, NiO, and NiO@rGO nanocomposite shown in Fig1(b). the broad peak absorbed at 26.1 o indicates (002) plane of bare rGO [13] shown in having cubic face structure with JC-PDS card no.78-0429 [5] . The representation of the rGO peak in NiO @rGO The crystallite size is predicting by Peak width, which is perpendicular to planes.…”

Section: Introductionmentioning

confidence: 99%

“…D is average Crystallite size, k is Scherrer constant, is a wavelength,  is FWHM,  is diffraction angle. [13] . The peak around 1628 cm -1 is due to -H2O bending vibration of the water molecule absorbed by material [15] .…”

Section: Introductionmentioning

confidence: 99%

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Microwave-irradiated novel mesoporous nickel oxide carbon nanocomposite electrodes for supercapacitor application

Kumar

Chidurala

Madhuri

et al. 2021

J Mater Sci: Mater Electron

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The present work accentuates the aspects of electrochemical analysis determined by Cyclic Voltammeter(CV), especially enhancement in Supercapacitor's specific capacitance and energy density. In this work, Nickel Oxide (NiO) and Nickel Oxide @ reduced Graphene Oxide (NiO@rGO) nanocomposite materials using as electrodes synthesized by the Microwave irradiation method. Performance of the synthesized material further characterized using X-Ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Field-Emission Scanning Electron Microscope (FE-SEM), BET(Brunauer-Emmett-Teller) specific surface-area, Thermo Gravimetric Analysis (TGA), and CV. Electrochemical performance of active material at three different molarities (2M, 4M & 6M) of potassium hydroxide (KOH) as an electrolyte is analyzed and observed decline in specific capacitance for synthesized nanocomposite materials in a lower state of electrolyte concentration. Accordingly, Specific capacitances at 1A/g are 270F/g, 395 F/g at 1A/g current density, and Energy densities of 10.2Wh/Kg, 17.55Wh/Kg are observed for NiO and NiO@rGO respectively at 6M KOH.

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“…The peak around 1070 cm -1 observed due to alkoxy and epoxy carbon-oxygen stretching vibration indicates binary nanocomposite formation of NiO@rGO [13] .…”

Section: Williamson and Hall Equationmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microwave-irradiated novel mesoporous nickel oxide carbon nanocomposite electrodes for supercapacitor application

Kumar

Chidurala

Madhuri

et al. 2021

J Mater Sci: Mater Electron

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“…The reactionary wavelengths are 670 nm and 771 nm, and it is the combination of the nanostructured material and its chemical composition in the presence of CO 2 that triggers the reaction, altering the distribution of the O-, O 2− and O 2-radicals within the materials, changing the electron density and hence the permittivity. The result is a small but significant change in the emission wavelengths [116]. A redox reaction using single-wall carbon nanotubes (CNTs) has been used for CO 2 detection [117], the chemical selectivity is discussed in terms of the activation energy, which has been lowered to allow for room temperature operation.…”

Section: Carbon Dioxidementioning

confidence: 99%

“…A number of MOS devices have LODs from 0.02% to 0.1%, but require 100 s of degrees centigrade to operate [183], which is an issue for sustained periods of standalone remote sensing. Recent published data on MOS sensors suggest ~0.2% to 1%, though still requiring elevated temperatures [112,113,116,123,181]. All optical fibre devices operate at room temperature.…”

Section: Comparison Of Performancesmentioning

confidence: 99%

A Review: Application and Implementation of Optic Fibre Sensors for Gas Detection

Allsop

Neal

2021

Sensors

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At the present time, there are major concerns regarding global warming and the possible catastrophic influence of greenhouse gases on climate change has spurred the research community to investigate and develop new gas-sensing methods and devices for remote and continuous sensing. Furthermore, there are a myriad of workplaces, such as petrochemical and pharmacological industries, where reliable remote gas tests are needed so that operatives have a safe working environment. The authors have concentrated their efforts on optical fibre sensing of gases, as we became aware of their increasing range of applications. Optical fibre gas sensors are capable of remote sensing, working in various environments, and have the potential to outperform conventional metal oxide semiconductor (MOS) gas sensors. Researchers are studying a number of configurations and mechanisms to detect specific gases and ways to enhance their performances. Evidence is growing that optical fibre gas sensors are superior in a number of ways, and are likely to replace MOS gas sensors in some application areas. All sensors use a transducer to produce chemical selectivity by means of an overlay coating material that yields a binding reaction. A number of different structural designs have been, and are, under investigation. Examples include tilted Bragg gratings and long period gratings embedded in optical fibres, as well as surface plasmon resonance and intra-cavity absorption. The authors believe that a review of optical fibre gas sensing is now timely and appropriate, as it will assist current researchers and encourage research into new photonic methods and techniques.

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Porous ZnO/rGO Nanosheet‐Based NO₂ Gas Sensor with High Sensitivity and ppb‐Level Detection Limit at Room Temperature

Chen

Guo

Zhang

et al. 2021

Adv Materials Inter

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High‐performance gas sensors are highly desirable for environmental monitoring, clinical medicine, and industrial production. Herein, a gas sensor with excellent sensing response at room temperature is presented based on zinc oxide/reduced graphene oxide (ZnO/rGO) composites. The ZnO/rGO composites with various contents of rGO and the pure ZnO are successfully fabricated by a facile hydrothermal method. Particularly, the ZnO/rGO sensor with 1.5 mL of the rGO exhibits highest sensing response in a wide range from 5 ppb to 10 ppm NO2 concentration and its response arrives at 13.46 when exposed to 2 ppm NO2 at room temperature. Furthermore, ZnO/rGO sensors show short response time (2 ppm, 26 s) and recovery time (2 ppm, 164 s) at room temperature. The proposed ZnO/rGO sensors present high sensitivity, excellent reproducibility, and stability. In addition, the density functional theory (DFT) calculations show that the increased electrical conductivity under exposure of NO2 gas are attributed to the numerous reactive sites and carrier mobility of rGO. These results demonstrate that ZnO/rGO gas sensor has huge potential for applications in industrial and environmental monitoring.

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A facile microwave route for fabrication of NiO/rGO hybrid sensor with efficient CO2 and acetone gas sensing performance using clad modified fiber optic method

Cited by 36 publications

References 37 publications

Microwave-irradiated novel mesoporous nickel oxide carbon nanocomposite electrodes for supercapacitor application

Microwave-irradiated novel mesoporous nickel oxide carbon nanocomposite electrodes for supercapacitor application

A Review: Application and Implementation of Optic Fibre Sensors for Gas Detection

Porous ZnO/rGO Nanosheet‐Based NO₂ Gas Sensor with High Sensitivity and ppb‐Level Detection Limit at Room Temperature

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A facile microwave route for fabrication of NiO/rGO hybrid sensor with efficient CO2 and acetone gas sensing performance using clad modified fiber optic method

Cited by 36 publications

References 37 publications

Microwave-irradiated novel mesoporous nickel oxide carbon nanocomposite electrodes for supercapacitor application

Microwave-irradiated novel mesoporous nickel oxide carbon nanocomposite electrodes for supercapacitor application

A Review: Application and Implementation of Optic Fibre Sensors for Gas Detection

Porous ZnO/rGO Nanosheet‐Based NO2 Gas Sensor with High Sensitivity and ppb‐Level Detection Limit at Room Temperature

Contact Info

Product

Resources

About

Porous ZnO/rGO Nanosheet‐Based NO₂ Gas Sensor with High Sensitivity and ppb‐Level Detection Limit at Room Temperature