Nanostructures-based sensing strategies for hydrogen sulfide

El-Shaheny, Rania; Belal, Fathalla; El-Shabrawy, Yasser; El-Maghrabey, Mahmoud

doi:10.1016/j.teac.2021.e00133

Cited by 15 publications

(11 citation statements)

References 84 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The most studied metal oxides are zinc oxide (ZnO), tungsten oxide (WO 3 ), cuprous oxide (Cu 2 O), stannous oxide (SnO 2 ), etc. These metal oxides have a fascinating history in sensing applications because of their excellent chemical stability along with mechanical flexibility, which is ascribed to their large specific surface areas . However, these sensors have an evident drawback because they can be operated at high temperatures, which results in a large power consumption and severely impacts the integration and long-term stability of these sensors.…”

Section: Graphene-based H2s Gas Sensorsmentioning

confidence: 99%

“…However, because of water and oxygen molecules adsorption, graphene and rGO display ambipolar and nearly synchronous activity in the regions of electron and hole doping, but they exhibit p (hole)-dominant conductivity. Notably, the introduction of n-type metal oxides to graphene sheets could lead to a p–n junction between these materials, resulting in a new type of nanohybrid structure that exhibits a better performance than the individual materials …”

Section: Graphene-based H2s Gas Sensorsmentioning

confidence: 99%

See 1 more Smart Citation

Overview of the Recent Advancements in Graphene-Based H₂S Sensors

Tan

Tang

Wang

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Hydrogen sulfide (H2S) gas detection at room temperature is of immense interest because it reduces power consumption, enhances long-term stability, and reduces the risk of explosion in the existence of flammable gases. Graphene-based gas sensors have been widely utilized in H2S sensing because of their atomically thick two-dimensional conjugated structures, huge specific surface areas, and excellent conductivity and mechanical stability. Usually graphene-based sensors exhibit high sensitivity and selectivity toward H2S gas with limits of detection below 100 ppb. In this critical review, we summarize the history and physicochemical properties of graphene. Further, we discuss recent advancements in the fabrication of graphene-based sensors including metal/graphene, metal oxide/graphene, polymers/graphene, and metal–organic frameworks/graphene sensors for applications in H2S gas sensing. Finally, future perspectives on the improvement of graphene-based H2S sensors are discussed.

show abstract

Section: Graphene-based H2s Gas Sensorsmentioning

confidence: 99%

Section: Graphene-based H2s Gas Sensorsmentioning

confidence: 99%

Overview of the Recent Advancements in Graphene-Based H₂S Sensors

Tan

Tang

Wang

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…The H 2 S reacts with ZnO to form a zinc sulphide layer that covers the surface of the sensor, which effectively increases the refractive index of the medium on top of the ZnO coating. Another material used to detect H 2 S is a graphene oxide coating that produces a redox reaction [155]; other strategies can be found elsewhere [156].…”

Section: Other Trace Gasesmentioning

confidence: 99%

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

Allsop

Neal

2021

Sensors

View full text Add to dashboard Cite

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.

show abstract

“…4,5 However, H 2 S-containing industrial wastewater is inevitably pumped into the environment which seriously contaminates water supplies and foodstuffs 6 and causes great damage to human health when contaminated water is unintentionally consumed. 7 Therefore, it is necessary to develop an analytical method for the selective and sensitive recognition of H 2 S in the food industry, 7,8 environmental monitoring [9][10][11] and living organisms. [12][13][14][15] Recent years have witnessed several methods including colorimetry, 16 electrochemical assay, 17 capillary electrophoresis, 18 chromatography, 19 etc.…”

Section: Introductionmentioning

confidence: 99%