WS2 nanosheets decorated multi-layered MXene based chemiresistive sensor for efficient detection and discrimination of NH3 and NO2

Sardana, Sagar; Debnath, A.K.; Aswal, D. K.; Mahajan, Aman

doi:10.1016/j.snb.2023.134352

Cited by 32 publications

(8 citation statements)

References 21 publications

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“…Moreover, the peak (002) of Ti 3 C 2 T x shifts to a lower diffraction angle. Moreover, the XRD pattern of Ti 3 C 2 T x MXene shows no (104) typical peak at 39.00°, indicating that the Al layers have been successfully etched from the Ti 3 AlC 2 Max phase. − By observing the pattern of Ti 3 C 2 T x /SnO 2 , we could see that the characteristic peaks of (110), (200), and (211) crystal faces of SnO 2 are weak and wide, which may be caused by the coating of SnO 2 nanoparticles on Ti 3 C 2 T x. , In short, Ti 3 C 2 T x /SnO 2 has been successfully prepared.…”

Section: Resultsmentioning

confidence: 98%

Design of Ti₃C₂T_x/SnO₂-Selective Ethanolamine Sensor

Xu,

Jiang,

Liu

et al. 2024

ACS Appl. Nano Mater.

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Two-dimensional transition metal carbides/nitrides (MXenes) show great potential in volatile organic compound (VOC) sensors owing to their exceptional electrical properties, numerous active sites, and abundant terminal functional groups. However, pure MXene Ti3C2T x is prone to oxidative degradation under ambient environment, and the insufficient response and poor stability are still grand challenges. Hereby, by deliberately introducing metal oxide semiconductor in multilayer Ti3C2T x , a promising Ti3C2T x /SnO2 sensor with excellent long-term stability and outstanding selectivity is developed for VOC monitoring. The research shows that the Ti3C2T x /SnO2 hybrid sensor implements efficient detection of hydrogen-bonded gases and is especially highly efficient with ethanolamine (EA). The sensitivity of the hybrid sensor to EA is improved by over 10-fold in comparison with pristine Ti3C2T x , besides the good selectivity to over 12 different VOCs. The synergistic effects of n-n nanoheterojunctions, the large specific surface area of 45.186 m2/g and mesoporous-rich hierarchical structure, and the functional terminal groups together facilitate the EA-sensitive properties. In addition, the innovative preparation of the Ti3C2T x /SnO2 sensor, which takes advantage of terpinol, contributes to the close contact of Ti3C2T x /SnO2 on the ceramic tubes, thus improving the sensor sensitivity. The scientific findings of this work may provide valuable ideas for the exploration of innovatively composite gas sensors.

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Section: Resultsmentioning

confidence: 98%

Design of Ti₃C₂T_x/SnO₂-Selective Ethanolamine Sensor

Xu,

Jiang,

Liu

et al. 2024

ACS Appl. Nano Mater.

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“…The appropriate use of the opposite response characteristics of sensors to different flammable gases to achieve gas discrimination in complex atmospheres is of great significance in actual applications. 57 Although many previous efforts have been made to improve the response performance of MOS-based hydrogen sensors, the work of fully distinguishing the response to H 2 from other typical flammable gases at room temperature has not been reported yet. This work provides a feasible method for the detection of H 2 with high selectivity at room temperature, and provides a solid experimental reference for subsequent gas discrimination research in related fields.…”

Section: Resultsmentioning

confidence: 99%

Ultra-effective room temperature gas discrimination based on monolithic Pd@MOF-derived porous nanocomposites: an exclusive scheme with photoexcitation

Duan,

Wang,

Peng

et al. 2024

J. Mater. Chem. A

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“…Such high operating temperatures not only lead to increased power consumption but also pose safety concerns in potentially explosive gas environments. − In this regard, achieving room-temperature detection of NO 2 is a challenging issue that must be addressed. Tungsten disulfide (WS 2 ) nanosheets (NSs), as one of the typical two-dimensional (2D) transition metal dichalcogenides (TMDs), have become ideal candidates for room-temperature gas sensors due to their large surface areas and high carrier mobilities at room temperature. − In addition, WS 2 NSs can be obtained via diverse preparation methods with excellent scalability, leading to wide applications in the fields of flexible and wearable devices. − The 2D structure of the WS 2 nanosheets offers a considerably expanded surface area, which facilitates a greater number of adsorption sites for gas molecules. However, the desorption of these adsorbed gas molecules becomes challenging due to the insufficient activation energy at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Ultraviolet Irradiation Stimulated NO₂ Sensing Using WS₂ Nanosheets Decorated with Au Nanoparticles

Li,

Yang,

Zhai

et al. 2024

ACS Appl. Nano Mater.

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transition metal dichalcogenides (TMDs) have attracted considerable attention in the field of room-temperature gas detection due to their high surface area and intriguing electronic properties. However, due to the insufficient activation energy for gas molecules at room temperature and the increased number of adsorption sites caused by the 2D structure, gas molecule desorption becomes challenging. As a result, TMDs-based gas sensors often exhibit a poor recovery performance. In this study, we developed an efficient nitrogen dioxide (NO 2 ) gas sensor based on gold (Au) nanoparticledecorated tungsten disulfide (WS 2 ) nanosheets. The sensor was prepared by using a straightforward liquid-phase exfoliation method combined with in situ reduction, enabling effective NO 2 detection at room temperature under ultraviolet (UV) activation. Specifically, the Au/WS 2 composite nanomaterial, with 5 mol % Au content, demonstrated a response of 32.1 when exposed to 10 ppm NO 2 under UV activation. The response is 9.44 times higher than that of the bare WS 2 based sensor, highlighting the remarkable enhancement achieved by incorporating Au nanoparticles and UV irradiation. Significantly, the UV-activated Au/WS 2 sensor was able to fully recover to the baseline position within 508 s, demonstrating an excellent recovery performance. Moreover, the sensor achieved a theoretical detection limit of 331 parts per billion (ppb) for NO 2 and exhibited good selectivity and long-term stability. The substantial improvement in sensing performance can be attributed to the synergistic effect of the electronic and chemical sensitization facilitated by the presence of Au nanoparticles, combined with the activation influence of UV irradiation. The energy introduced by UV irradiation further promotes the catalytic performance of Au nanoparticles at room temperature, while the photoinduced electron/hole pairs enhance the gas sensing performance of NO 2 . This study provides a feasible pathway for preparing WS 2 -based composite nanomaterials and enhancing the sensing performance of TMDs-based gas sensors at room temperature.

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WS2 nanosheets decorated multi-layered MXene based chemiresistive sensor for efficient detection and discrimination of NH3 and NO2

Cited by 32 publications

References 21 publications

Design of Ti₃C₂T_x/SnO₂-Selective Ethanolamine Sensor

Design of Ti₃C₂T_x/SnO₂-Selective Ethanolamine Sensor

Ultra-effective room temperature gas discrimination based on monolithic Pd@MOF-derived porous nanocomposites: an exclusive scheme with photoexcitation

Ultraviolet Irradiation Stimulated NO₂ Sensing Using WS₂ Nanosheets Decorated with Au Nanoparticles

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WS2 nanosheets decorated multi-layered MXene based chemiresistive sensor for efficient detection and discrimination of NH3 and NO2

Cited by 32 publications

References 21 publications

Design of Ti3C2Tx/SnO2-Selective Ethanolamine Sensor

Design of Ti3C2Tx/SnO2-Selective Ethanolamine Sensor

Ultra-effective room temperature gas discrimination based on monolithic Pd@MOF-derived porous nanocomposites: an exclusive scheme with photoexcitation

Ultraviolet Irradiation Stimulated NO2 Sensing Using WS2 Nanosheets Decorated with Au Nanoparticles

Contact Info

Product

Resources

About

Design of Ti₃C₂T_x/SnO₂-Selective Ethanolamine Sensor

Design of Ti₃C₂T_x/SnO₂-Selective Ethanolamine Sensor

Ultraviolet Irradiation Stimulated NO₂ Sensing Using WS₂ Nanosheets Decorated with Au Nanoparticles