Highly selective sub–10 ppm H2S gas sensors based on Ag-doped CaCu3Ti4O12 films

Natkaeo, Aukrit; Phokharatkul, Ditsayut; Hodak, José H.; Wisitsoraat, Anurat; Hodak, Satreerat K.

doi:10.1016/j.snb.2017.12.134

Cited by 47 publications

(7 citation statements)

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“…The corresponding adsorption energies are -0.156eV and -0.147eV for P and P1 configurations, respectively. The computed adsorption energy for H 2 S molecule is higher than MoS 2 (-0.12eV) 9 but less than WS 2 monolayer (-0.18eV) 52 monolayer. Fig.…”

Section: Hydrogen Sulfide (H 2 S)mentioning

confidence: 79%

Defect engineered MoSSe Janus monolayer as a promising two dimensional material for NO2 and NO gas sensing

Chaurasiya

Dixit

2019

Applied Surface Science

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Gas sensing mechanism of H 2 S, NH 3 , NO 2 and NO toxic gases on transition metal dichalcogenides based Janus MoSSe monolayers are investigated using the density functional theory. The pristine and defect included MoSSe layers are considered as a host material for adsorption study. Three types of defects (i) molybdenum vacancy, (ii) selenium vacancy, and (iii) sulfur/selenium vacancy are studied to understand their impact on electronic properties and sensing of these gas molecules. The formation energy is computed to predict the stability of these defects and noticed that selenium vacancy is the most stable among other defects. The adsorption of gas molecules is evaluated in terms of adsorption energy, vertical height, charge difference density, Bader charge analysis, electronic and magnetic properties. The maximum adsorption energy for H 2 S, NH 3 , NO 2 and NO molecules on pristine Janus MoSSe monolayer are ~ -0.156eV, -0.203eV, -0.252eV, and -0.117eV, respectively. Selenium and sulfur/selenium defects significantly improve the sensing of the gas molecules. NO 2 gas molecule dissociates and forms oxygen doped NO adsorption in selenium and sulfur/selenium defect included MoSSe Janus monolayer. The adsorption energy values are ~ -3.360eV and -3.404eV for Se and S/Se defects included MoSSe layer, respectively. Further, the adsorption of NO 2 molecule induced about 1µ B magnetic moment. In contrast, NO molecule showed chemisorption on the surface of the selenium and sulfur/selenium defect included Janus MoSSe monolayers, whereas H 2 S and NH 3 molecules showed physisorption with their adsorption energies in the range of -0.146 to -0.238 eV and -0.140 to -0.281 eV, respectively. The adsorption of H 2 S, NH 3 , NO 2 and NO molecule on the pristine and defected monolayers suggest that selenium and sulfur/selenium vacancy defects are more prominent for NO 2 and NO gas molecule adsorption.

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Section: Hydrogen Sulfide (H 2 S)mentioning

confidence: 79%

Defect engineered MoSSe Janus monolayer as a promising two dimensional material for NO2 and NO gas sensing

Chaurasiya

Dixit

2019

Applied Surface Science

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“…Meanwhile, the use of transition or noble metal doping to form composites [35][36][37][38][39] is also one of the most effective strategies to improve the performance of metal oxide gas sensors. It is generally accepted that the presence of metallic elements (Ce, Co, Fe, Pt, Pd, Ag, Au, etc.)…”

Section: Introductionmentioning

confidence: 99%

An Au/SnO–SnO₂ nanosheet based composite used for rapid detection of hydrogen sulphide

Zou

Huang

et al. 2023

Anal. Methods

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“…More importantly, the SnO 2 –ZnO–Pt NS sensing materials were synthesized in situ on MEMS devices, which are expected to be high-performance gas sensors with superior sensitivity, great selectivity, good reproducibility, and low power consumption for enhanced H 2 S detection. The gas sensor based on SnO 2 –ZnO–Pt NSs will have great potential in terms of H 2 S detection for sewer monitoring, biogas production monitoring, food decomposition, and construction industries. − …”

Section: Introductionmentioning

confidence: 99%

Pt Nanoparticle-Modified SnO₂–ZnO Core–Shell Nanosheets on Microelectromechanical Systems for Enhanced H₂S Detection

Zhu

Sun

et al. 2022

ACS Appl. Nano Mater.

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Pt nanoparticle (NP)-modified SnO2–ZnO (SnO2–ZnO–Pt) core–shell nanosheets (NSs) for hydrogen sulfide (H2S) gas sensing were successfully synthesized via atomic layer deposition, hydrothermal method, and magnetron sputtering. More importantly, the SnO2–ZnO–Pt NS sensing materials were synthesized in situ on microelectromechanical system (MEMS) devices, which are expected to be high-performance gas sensors with superior sensitivity, great selectivity, good reproducibility, and low power consumption. To be specific, the SnO2–ZnO–Pt NSs displayed a high sensitivity (R a/R g) of 30.43 and an excellent selectivity when detecting 5 ppm H2S at an operating temperature of 375 °C. Their rate of resistance change was 29.43, which was about 24 and 9 times those of the pristine SnO2 NS (∼1.25) and SnO2–ZnO core–shell NS (∼3.43) sensors, respectively. These substantially improved sensing properties could be mainly attributed to the formation of heterojunctions, catalytic sensitization effect, and increased specific surface area of Pt NP modification. Thus, the proposed SnO2–ZnO–Pt NS gas sensors demonstrate great potential as a high-performance sensing material for application in H2S gas sensors.

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Highly selective sub–10 ppm H2S gas sensors based on Ag-doped CaCu3Ti4O12 films

Cited by 47 publications

References 50 publications

Defect engineered MoSSe Janus monolayer as a promising two dimensional material for NO2 and NO gas sensing

Defect engineered MoSSe Janus monolayer as a promising two dimensional material for NO2 and NO gas sensing

An Au/SnO–SnO₂ nanosheet based composite used for rapid detection of hydrogen sulphide

Pt Nanoparticle-Modified SnO₂–ZnO Core–Shell Nanosheets on Microelectromechanical Systems for Enhanced H₂S Detection

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Highly selective sub–10 ppm H2S gas sensors based on Ag-doped CaCu3Ti4O12 films

Cited by 47 publications

References 50 publications

Defect engineered MoSSe Janus monolayer as a promising two dimensional material for NO2 and NO gas sensing

Defect engineered MoSSe Janus monolayer as a promising two dimensional material for NO2 and NO gas sensing

An Au/SnO–SnO2 nanosheet based composite used for rapid detection of hydrogen sulphide

Pt Nanoparticle-Modified SnO2–ZnO Core–Shell Nanosheets on Microelectromechanical Systems for Enhanced H2S Detection

Contact Info

Product

Resources

About

Highly selective sub–10 ppm H2S gas sensors based on Ag-doped CaCu3Ti4O12 films

An Au/SnO–SnO₂ nanosheet based composite used for rapid detection of hydrogen sulphide

Pt Nanoparticle-Modified SnO₂–ZnO Core–Shell Nanosheets on Microelectromechanical Systems for Enhanced H₂S Detection