PtS-decorated WS2 microflakes based sensors for selective ammonia detection at room temperature

Guang, Qiyilan; Huang, Baoyu; Yu, Jun; Bonyani, Maryam; Moaddeli, Mohammad; Kanani, Mansour; Mirzaei, Ali; Kim, Hyoun Woo; Kim, Sang Sub; Li, Xiaogan

doi:10.1016/j.snb.2023.134399

Cited by 23 publications

(4 citation statements)

References 28 publications

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“…They show that the designed 2D-WS 2 sensor performed well as a very accurate and dependable relative humidity probe for sustainable applications. As per the outcomes of Qiyilan Guang et al [15], the overabundance of Au on the WS 2 's surface of micro-flakes enhanced the gas-sensing properties by means of the synergistic effect of chemical and electrical hypersensitivity between WS 2 and Au. All of the aforementioned literature writings have proven that WS 2 material with doping is a valuable material for gas sensing.…”

Section: Introductionmentioning

confidence: 75%

Industrial zone-based harmful gas sensor using pure WS₂ via doping transition metals (Co, Ni) - a DFT approach

Poornimadevi,

Preferencial Kala,

John Thiruvadigal

2024

Phys. Scr.

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Tungsten disulphide (WS2) has received a lot of interest for its usage in a variety of fields due to its acceptable bandgap and various traits/characteristics. Presently, density functional theory (DFT) has been deployed to thoroughly study the adsorption characteristics of gases (NO, NO2, NH3, BCl3, & SO2) on Y-WS2 (Y= Co, Ni) by determining the adsorption distance, adsorption energy, electron difference density, charge transfer, electron localisation function, recovery time, & work function, also by comparing the band structure, the density of states and the projected density of states. Our results show that Y-WS2 has better conductivity and enormous charge transfer than pure WS2. Additionally, the Y-WS2 exhibits stronger adsorption of more than -0.5eV for the harmful gases NO2, BCl3, and SO2. Subsequently, for Y-WS2, there is electron localisation overlap only for the BCl3 gas adsorbed system, which highlights the chemisorption character of the gases. Due to the high adsorption energy, Y-WS2 takes a longer time to recover NO2, BCl3, and SO2 gases at ambient temperature. However, by raising the temperature to 673K, we can quickly recover these molecules from Y-WS2 in a few microseconds. We came to the conclusion that Y-WS2 is the right approach for NO2, BCl3, and SO2 gas-sensing applications.

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Section: Introductionmentioning

confidence: 75%

Industrial zone-based harmful gas sensor using pure WS₂ via doping transition metals (Co, Ni) - a DFT approach

Poornimadevi,

Preferencial Kala,

John Thiruvadigal

2024

Phys. Scr.

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“…The typical sensing processes are involved with the redox reactions between targeted gas species and the preadsorbed ionized O 2 , typically O 2 – at low temperatures, at surface of the semiconductor sensing materials. The O 2 – would be consumed and discharge its seized electrons backward into the surfaces of sensitive materials leading to a change of electrical resistances of the sensors. − Therefore, the following reactions are likely occurred during the sensing processes to NH 3 O 2 ( a i r ) → O 2 ( a d s ) O 2 ( a d s ) + e − → O 2 − ( a d s ) ( normalb normale normall normalo normalw 100 .25em ° C ) 4 normalN H 3 + 7 O 2 − → 4 normalN O 2 + 6 H 2 normalO + 7 e − When the NiO/WS 2 heterostructure sensing material was exposed to air, O 2 in air would be absorbed at the surfaces of NiO/WS 2 material (reaction ). They would capture the electrons from the CB of the sensitive materials and then be transformed to the ionized oxygen state (O 2 – ) according to reactions (2–3).…”

Section: Resultsmentioning

confidence: 99%

Microjunction-Modulated Selective Ammonia Sensor with P-Type Oxides-Decorated WS₂ Microflakes

Guang,

Sun,

Huang

et al. 2024

ACS Appl. Mater. Interfaces

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In this study, p-type oxides including NiO, Co 3 O 4 , and CuO had been heterostructured with WS 2 microflakes for chemiresistive-type gas sensors at room temperature. Microjunctions formed between p-type oxides and WS 2 microflakes effectively modulated the sensitivities of the sensors to ammonia. In comparison to Co 3 O 4 -or CuO-decorated WS 2 -based sensors in which "deep energy puddles" were formed at the microjunctions between the oxides and WS 2 , the fabricated NiO/WS 2 heterostructurebased sensor without the formed energy puddles exhibited a better sensing performance with improved sensitivity and a faster response to gaseous 1−10 ppm of NH 3 . It also processes a good selectivity to some volatile organic compounds including HCHO, toluene, CH 3 OH, C 2 H 5 OH, CH 3 COCH 3 , and trimethylamine (TMA). The underlying mechanisms for the enhanced responses were examined by employing in situ diffuse reflectance infrared Fourier transform spectroscopy and density functional theory computation. The oxidization of NH 3 on NiO/WS 2 was much more intensified compared to those occurred on Co 3 O 4 /WS 2 and CuO/WS 2 . NiO/WS 2 has a stronger adsorption to NH 3 and gains more effective charges transferred from NH 3 which significantly contributes to the enhanced sensing properties. KEYWORDS: NiO/WS 2 heterostructure, NH 3 sensor, in situ DRIFTS, DFT calculations, room temperature gas sensors

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“…Au-decoration is a feasible technique to enhance the gas sensing features of TMDs owing to catalytic and electronic effects of Au NPs. 144,186 Au-decorated 2D WS 2 NS sensors on PI were used in self-heating mode (1–5 V). The sensor had a response of 1.6 on exposure to 50 ppm of CO gas with 2 V applied voltage.…”

Section: Experimental Investigations Of Ws2-based Gas Sensorsmentioning

confidence: 99%

Strategic review of gas sensing enhancement ways of 2D tungsten disulfide/selenide-based chemiresistive sensors: decoration and composite

Kumar,

Mirzaei,

Lee

et al. 2024

J. Mater. Chem. A

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PtS-decorated WS2 microflakes based sensors for selective ammonia detection at room temperature

Cited by 23 publications

References 28 publications

Industrial zone-based harmful gas sensor using pure WS₂ via doping transition metals (Co, Ni) - a DFT approach

Industrial zone-based harmful gas sensor using pure WS₂ via doping transition metals (Co, Ni) - a DFT approach

Microjunction-Modulated Selective Ammonia Sensor with P-Type Oxides-Decorated WS₂ Microflakes

Strategic review of gas sensing enhancement ways of 2D tungsten disulfide/selenide-based chemiresistive sensors: decoration and composite

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PtS-decorated WS2 microflakes based sensors for selective ammonia detection at room temperature

Cited by 23 publications

References 28 publications

Industrial zone-based harmful gas sensor using pure WS2 via doping transition metals (Co, Ni) - a DFT approach

Industrial zone-based harmful gas sensor using pure WS2 via doping transition metals (Co, Ni) - a DFT approach

Microjunction-Modulated Selective Ammonia Sensor with P-Type Oxides-Decorated WS2 Microflakes

Strategic review of gas sensing enhancement ways of 2D tungsten disulfide/selenide-based chemiresistive sensors: decoration and composite

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Product

Resources

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Industrial zone-based harmful gas sensor using pure WS₂ via doping transition metals (Co, Ni) - a DFT approach

Industrial zone-based harmful gas sensor using pure WS₂ via doping transition metals (Co, Ni) - a DFT approach

Microjunction-Modulated Selective Ammonia Sensor with P-Type Oxides-Decorated WS₂ Microflakes