1T/2H-MoS2 engineered by in-situ ethylene glycol intercalation for improved toluene sensing response at room temperature

Taufik, Ardiansyah; Kato, Hideki; Kakihana, Masato; Saleh, Rosari; Sekino, Tohru; Yin, Shu

doi:10.1016/j.apt.2020.02.022

Cited by 32 publications

(17 citation statements)

References 65 publications

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“…Several reports have demonstrated the formation of 1 T/2H-MoS 2 for various kinds of applications, such as hydrogen evolution reactions [201,203,204], hydrodesulfurization [205], and gas sensor applications [172]. Yang et al [206] demonstrated the formation of the 1 T/2H-mix phase in the molybdenum tungsten sulfate (MWS 2 ) system for acetone gas detections.…”

Section: T-2h Phase Controlmentioning

confidence: 99%

“…The enhanced acetone detection performance to several folds was achieved with only 10% of 1 T content in the MWS 2 system. Taufik et al [172] have also successfully demonstrated the formation of 1 T/2H-MoS 2 structure via ethylene glycol (EG) intercalation for improved toluene gas detection performance. The EG intercalation process enhanced the ratio 1 T/2H phase from 1.7 to 4.0 and decreased the conductivity of 1 T/2H-MoS 2 due to EG low conductivity.…”

Section: T-2h Phase Controlmentioning

confidence: 99%

“…In 1 T-MoS 2 , the surface-active is located in both edges and activated basal plane [ 170 ]. Therefore, 1 T-MoS 2 is more promising for chemical adsorption technology, such as catalysts and sensors [ 171 , 172 ]. In a typical XRD pattern of MoS 2 , three main peaks emerge.…”

Section: Molybdenum Disulfide (Mos 2 ) Gas Sensing Materialsmentioning

confidence: 99%

Section: Molybdenum Disulfide (Mos 2 ) Gas Sensing Materialsmentioning

confidence: 99%

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Advanced Strategies to Improve Performances of Molybdenum-Based Gas Sensors

et al. 2021

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Molybdenum-based materials have been intensively investigated for high-performance gas sensor applications. Particularly, molybdenum oxides and dichalcogenides nanostructures have been widely examined due to their tunable structural and physicochemical properties that meet sensor requirements. These materials have good durability, are naturally abundant, low cost, and have facile preparation, allowing scalable fabrication to fulfill the growing demand of susceptible sensor devices. Significant advances have been made in recent decades to design and fabricate various molybdenum oxides- and dichalcogenides-based sensing materials, though it is still challenging to achieve high performances. Therefore, many experimental and theoretical investigations have been devoted to exploring suitable approaches which can significantly enhance their gas sensing properties. This review comprehensively examines recent advanced strategies to improve the nanostructured molybdenum-based material performance for detecting harmful pollutants, dangerous gases, or even exhaled breath monitoring. The summary and future challenges to advance their gas sensing performances will also be presented.

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Section: T-2h Phase Controlmentioning

confidence: 99%

Section: T-2h Phase Controlmentioning

confidence: 99%

Section: Molybdenum Disulfide (Mos 2 ) Gas Sensing Materialsmentioning

confidence: 99%

Section: Molybdenum Disulfide (Mos 2 ) Gas Sensing Materialsmentioning

confidence: 99%

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Advanced Strategies to Improve Performances of Molybdenum-Based Gas Sensors

et al. 2021

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“…However, 1T-MoS 2 is more unstable compared with 2H-MoS 2 for use as a sensor material, suggesting that 1T-MoS 2 cannot be directly used for sensor devices. Recently, it was proposed that the composite between 1T and 2H MoS 2 (1T/2H MoS 2 ) simultaneously possessed a large number of active sites for chemical adsorption and high stability. , However, the change of the resistance under different humidity conditions is still small . Therefore, new strategies for improving the sensing properties of 1T/2H MoS 2 are needed.…”

Section: Introductionmentioning

confidence: 99%

Surface Engineering of 1T/2H-MoS₂ Nanoparticles by O₂ Plasma Irradiation as a Potential Humidity Sensor for Breathing and Skin Monitoring Applications

Taufik

Hasegawa

Kato

et al. 2020

ACS Appl. Nano Mater.

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For improving the sensor performance of molybdenum disulfide (MoS2), the modification of surface properties is essential. In this study, the surfaces of MoS2 nanoparticles with a mixture of 1T (metallic) and 2H (semiconductor) (1T/2H-MoS2) prepared solvothermally were modified by O2 plasma irradiation to enhance their humidity-sensing properties. The O2 plasma irradiation of MoS2 induced MoO3 formation on the surfaces. The amount of MoO3 increased with increasing O2 plasma irradiation time. The specific surface area, as well as total pore volume, increased after O2 plasma irradiation from 28 m2/g and 0.089 cm3/g to 185 m2/g and 0.279 cm3/g, respectively. The pore size distribution shifted to a lower value after O2 plasma irradiation. These results suggest that the O2 plasma irradiation can modify the surface nature of 1T/2H-MoS2 nanoparticles. The humidity-sensing properties of the obtained samples were evaluated with various relative humidity (RH) values. When the O2 plasma-irradiated MoS2 sensor was exposed to a higher RH, a higher response was obtained. The sensor response of the O2 plasma-irradiated MoS2 nanoparticles was significantly enhanced to around 100% at 95% RH compared with the sample before the O2 plasma irradiation. As a demonstration of a practical application, the materials were used for the sensing of human breath. The breath testing indicated a good response, and the sensor also distinguished wet and dry hands clearly. These results strongly suggested that the O2 plasma-irradiated MoS2 can be applied for breath testing as well as in skin monitoring devices.

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Tuning surface wettability of MoS₂ to enhance solar‐driven evaporation rates

Emrinaldi

Dwiputra

Fareza

et al. 2023

Env Prog and Sustain Energy

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Molybdenum disulfide (MoS2), a promising two‐dimensional photothermal material, possesses the capability to convert solar irradiation into thermal energy. This conversion is beneficial for processes like wastewater treatment and seawater desalination. Nevertheless, the influence of the surface chemical properties of MoS2, particularly its wettability, on the evaporation rate of water confined to the surface remains unexplored. In our study, we demonstrate that the wettability degree of MoS2 significantly influences its water evaporation rate performance. Interestingly, this parameter can be simply and accurately modulated by altering the synthesis time of MoS2. We synthesized MoS2 via a simple hydrothermal method at three different durations: 16, 20, and 24 h, at 200°C. Subsequently, we impregnated the resultant MoS2 onto air‐laid paper (ALP), forming a solar‐driven evaporator system. We found that the MoS2 nanosheets synthesized within the shortest duration (MoS2‐16 h) exhibited the highest evaporation rate of 1.77 kg m−2 h−1, along with 92% energy efficiency. MoS2‐16 h resulted in MoS2 rich in defects, featuring the largest surface area and the smallest contact angle. The hydrophilic areas of MoS2‐16 h facilitated the continuous diffusion of water molecules through defect sites, treating them as contact lines. Additionally, the expansive surface area introduced a larger region for light absorption, enhancing water‐solid interactions. The presence of molybdenum oxide on the surface of the nanosheet system also contributed to superior wettability behavior. Notably, all the tested MoS2/ALP systems in this study displayed excellent performance in salt rejection and heavy metal ion concentration reduction.

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1T/2H-MoS2 engineered by in-situ ethylene glycol intercalation for improved toluene sensing response at room temperature

Cited by 32 publications

References 65 publications

Advanced Strategies to Improve Performances of Molybdenum-Based Gas Sensors

Advanced Strategies to Improve Performances of Molybdenum-Based Gas Sensors

Surface Engineering of 1T/2H-MoS₂ Nanoparticles by O₂ Plasma Irradiation as a Potential Humidity Sensor for Breathing and Skin Monitoring Applications

Tuning surface wettability of MoS₂ to enhance solar‐driven evaporation rates

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1T/2H-MoS2 engineered by in-situ ethylene glycol intercalation for improved toluene sensing response at room temperature

Cited by 32 publications

References 65 publications

Advanced Strategies to Improve Performances of Molybdenum-Based Gas Sensors

Advanced Strategies to Improve Performances of Molybdenum-Based Gas Sensors

Surface Engineering of 1T/2H-MoS2 Nanoparticles by O2 Plasma Irradiation as a Potential Humidity Sensor for Breathing and Skin Monitoring Applications

Tuning surface wettability of MoS2 to enhance solar‐driven evaporation rates

Contact Info

Product

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Surface Engineering of 1T/2H-MoS₂ Nanoparticles by O₂ Plasma Irradiation as a Potential Humidity Sensor for Breathing and Skin Monitoring Applications

Tuning surface wettability of MoS₂ to enhance solar‐driven evaporation rates