Graphene-Based Hydrogen Gas Sensors: A Review

Ilnicka, Anna; Łukaszewicz, Jerzy P.

doi:10.3390/pr8050633

Cited by 37 publications

(29 citation statements)

References 128 publications

(161 reference statements)

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“…By increasing the CO 2 concentration, the response proportionally increases due to more CO 2 gas molecules adsorbing on the surface, leading to a higher sensing response. This agrees with many previous works [61,62].…”

Section: Dynamic Responsesupporting

confidence: 94%

Fabrication of ZnO/CNTs for Application in CO2 Sensor at Room Temperature

et al. 2021

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Thin films of ZnO and ZnO/carbon nanotubes (CNTs) are prepared and used as CO2 gas sensors. The spray pyrolysis method was used to prepare both ZnO and ZnO/CNTs films, with CNTs first prepared using the chemical vapor deposition method (CVD). The chemical structure and optical analyses for all the prepared nanomaterials were performed using X-ray diffraction (XRD), Fourier transformer infrared spectroscopy (FTIR), and UV/Vis spectrophotometer devices, respectively. According to the XRD analysis, the crystal sizes of ZnO and ZnO/CNTs were approximately 50.4 and 65.2 nm, respectively. CNTs have average inner and outer diameters of about 3 and 13 nm respectively, according to the transmitted electron microscope (TEM), and a wall thickness of about 5 nm. The detection of CO2 is accomplished by passing varying rates of the gas from 30 to 150 sccm over the prepared thin-film electrodes. At 150 sccm, the sensitivities of ZnO and ZnO/CNTs sensors are 6.8% and 22.4%, respectively. The ZnO/CNTs sensor has a very stable sensitivity to CO2 gas for 21 days. Moreover, this sensor has a high selectivity to CO2 in comparison with other gases, in which the ZnO/CNTs sensor has a higher sensitivity to CO2 compared to H2 and C2H2.

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Section: Dynamic Responsesupporting

confidence: 94%

Fabrication of ZnO/CNTs for Application in CO2 Sensor at Room Temperature

et al. 2021

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“…Over the past decade research on graphene increased dramatically because of new methods to produce and study it. Graphene and functionalized graphene (FG) have been successfully used in many applications including in smart phones, ultra-thin flexible displays [ 31 ], hydrogen storage [ 32 ], transparent touch-screens [ 33 ], chemical sensors effective at detecting explosives [ 34 , 35 ], biosensors, super-fast transistors [ 36 , 37 , 38 ], and so on. Graphene has been investigated for tissue engineering [ 39 ].…”

Section: Graphenementioning

confidence: 99%

“…Graphene is quite a robust material in hydrogen sensors due to a possible improvement of its surface area and susceptibility of its electronic properties to the changes caused by adsorbing atoms and molecules including hydrogen. However, the pristine graphene sensitiveness to hydrogen is limited [ 34 ]. Sharma et al, developed a dual FET hydrogen gas sensor using graphene decorated Pd-Ag alloy nanoparticles for H 2 detection [ 165 ].…”

Section: Characterization Of Graphene and Graphene Nanoplatelets (Xgnps)mentioning

confidence: 99%

Graphene-Based Nanocomposites: Synthesis, Mechanical Properties, and Characterizations

et al. 2021

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Graphene-based nanocomposites possess excellent mechanical, electrical, thermal, optical, and chemical properties. These materials have potential applications in high-performance transistors, biomedical systems, sensors, and solar cells. This paper presents a critical review of the recent developments in graphene-based nanocomposite research, exploring synthesis methods, characterizations, mechanical properties, and thermal properties. Emphasis is placed on characterization techniques and mechanical properties with detailed examples from recent literature. The importance of characterization techniques including Raman spectroscopy, X-ray diffraction (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HRTEM) for the characterization of graphene flakes and their composites were thoroughly discussed. Finally, the effect of graphene even at very low loadings on the mechanical properties of the composite matrix was extensively reviewed.

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“…Although 3D graphene has broad prospects in the field of gas sensors with the super high sensitivity, the selectivity is not satisfactory. Different gas molecules may adsorb on the same 3D graphene sheets and lead to the total change of the resistance [ 50 , 51 ]. It is difficult to quantitatively distinguish one target gas from a gas mixture.…”

Section: Introductionmentioning

confidence: 99%

“…They concluded a variety of logical strategies to design the 3D nanohybrids of RGO and MOx. In 2020, Ilnicka et al [ 51 ] summarized the graphene-based hydrogen gas sensors, a special case of gas sensitivity to H 2 . However, the above reviews did not reflect the whole progress of graphene gas sensors, especially for the air pollution monitoring applications.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress of Toxic Gas Sensors Based on 3D Graphene Frameworks

Dong

Xiao

Chu

et al. 2021

Sensors

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Air pollution is becoming an increasingly important global issue. Toxic gases such as ammonia, nitrogen dioxide, and volatile organic compounds (VOCs) like phenol are very common air pollutants. To date, various sensing methods have been proposed to detect these toxic gases. Researchers are trying their best to build sensors with the lowest detection limit, the highest sensitivity, and the best selectivity. As a 2D material, graphene is very sensitive to many gases and so can be used for gas sensors. Recent studies have shown that graphene with a 3D structure can increase the gas sensitivity of the sensors. The limit of detection (LOD) of the sensors can be upgraded from ppm level to several ppb level. In this review, the recent progress of the gas sensors based on 3D graphene frameworks in the detection of harmful gases is summarized and discussed.

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Graphene-Based Hydrogen Gas Sensors: A Review

Cited by 37 publications

References 128 publications

Fabrication of ZnO/CNTs for Application in CO2 Sensor at Room Temperature

Fabrication of ZnO/CNTs for Application in CO2 Sensor at Room Temperature

Graphene-Based Nanocomposites: Synthesis, Mechanical Properties, and Characterizations

Recent Progress of Toxic Gas Sensors Based on 3D Graphene Frameworks

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