Humidity sensing properties of the hydrothermally synthesized WS2-modified SnO2 hybrid nanocomposite

Chen, Yunpeng; Pei, Yongyong; Jiang, Zhipeng; Shi, Zhifeng; Xu, Junmin; Wu, Di; Xu, Tingting; Tian, Yongtao; Wang, Xinchang; Li, Xinjian

doi:10.1016/j.apsusc.2018.03.154

Cited by 49 publications

(21 citation statements)

References 20 publications

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“…7a-h). Moreover, the hydrothermal/solvothermal reactions also enable the preparation of different WS 2 -based composites with carbon materials [111,112], TMDs [113,114], metal oxides [115][116][117] and hydroxides [118] through the liquid-phase routes (morphologies of the representative hybrids are shown in Fig. 7i-l).…”

Section: Liquid-phase Synthesismentioning

confidence: 99%

Tungsten disulfide: synthesis and applications in electrochemical energy storage and conversion

et al. 2020

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Recently, two-dimensional transition metal dichalcogenides, particularly WS 2 , raised extensive interest due to its extraordinary physicochemical properties. With the merits of low costs and prominent properties such as high anisotropy and distinct crystal structure, WS 2 is regarded as a competent substitute in the construction of next-generation environmentally benign energy storage and conversion devices. In this review, we begin with the fundamental studies of the structure, properties and preparation of WS 2 , followed by detailed discussions on the development of various WS 2 and WS 2-based composites for electrochemical energy storage and conversion applications. In the end, some prospective prospects and promising developments of WS 2 in these fields are proposed.

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Section: Liquid-phase Synthesismentioning

confidence: 99%

Tungsten disulfide: synthesis and applications in electrochemical energy storage and conversion

et al. 2020

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“…Hydrothermal method provides a unique path for developing self assembled nanostructures of zirconia in combination with other metals. Highly ordered nanomaterials can give better and stable electrochemical performance due to synergistic effect of that arise in the bimetallic materials [29,30] …”

Section: Introductionmentioning

confidence: 99%

“…Highly ordered nanomaterials can give better and stable electrochemical performance due to synergistic effect of that arise in the bimetallic materials. [29,30] Herein, we report preparation of manganese doped zirconia (Mn 3 + /4 + : ZrO 2 nanoganitrus) self assembly by facile hydrothermal process. Mn 3 + /4 + : ZrO 2 nanoganitrus porous hierarchical nanostructures composed of tiny particles.…”

Section: Introductionmentioning

confidence: 99%

Elaeocarpus Ganitrus Structured Mesoporous Hybrid Mn^3+/4+ loaded Zirconia Self Assembly as a Versatile Amperometric Probe for the Electrochemical Detection of Nitrite

Gangadharappa

Raghu²,

Kumar

et al. 2021

ChemistrySelect

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Selective and highly sensitive detection of nitrite is always a challenge for electrochemist for the administration of nitrite in water and food samples. In this regard nanostructured materials are crown choice. In the present investigation, we have prepared uniformly ordered hybrid Mn 3 + /4 + : ZrO 2 nanoganitrus via hydrothermal method, characterized by XRD, BET, SEM, TEM and XPS to understand the structural and morphological features of the material and used for the electrocatalytic determination of nitrite. The preparation process resulted in the formation of nanoganitrus heterostructures with honeycomb arrangement. High surface area, ganitrus structure and hybrid Mn 3 + /4 + in the material was correlated to its robust electrochemical performance. Thus, prepared sensor showed highly selective and sensitive determination of nitrite with a good linear range of 250 μM to 10,000 μM with correlation coefficient of 0.998 and a sensitivity of 38.8 μAmM À 1 cm À 2. The limit of Detection of nitrite sensing system was 93 μM at a signal to noise ratio of 3. Also, the sensor showed prominent reproducibility, good stability, anti-interference performance and also the prepared sensor was successfully used for the detection of nitrite in real samples.

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“…Among these TMDCs is WS2 with a tunable band gap of 1.35 − 2.1 eV [1], higher phonon-limited electron mobility and stronger thermal stability than other TMDCs [2]. Consequently, the sensing properties of various WS2 materials (pristine and modified) to gases such as acetone, NO2 [3,4], NH3 [2], humidity [5], H2S [6], H2 [4,5], ethanol [7] and O2 [7], CO [6], NO [6] have been reported. Among these gases is NH3 which has found application in the chemical and fertilizer industries, explosives and medical diagnostics [2].…”

Section: Introductionmentioning

confidence: 99%

“…Different morphologies of WS2 nanostructures such as nanorods, nanoflakes, nanoflowers and nanosheets have been fabricated through these synthetic methods for application in gas sensing. The gas sensing performance of nanosheets and nanoflakes of pristine and functionalized WS2 is well documented [2][3][4][5][6]. However, the unusual geometry and robust structure of the nanoflower morphology is generating a considerable amount of curiosity.…”

Section: Introductionmentioning

confidence: 99%

Limiting the Oxidation of WS2 Nanostructures by Oleylamine Surface Passivation for Room Temperature NH3 Sensing

Gqoba¹,

Rodrigues²,

Mphahlele³

et al. 2020

Preprint

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Oleylamine capped WS2 nanostructures were successfully formed at 320 °C via a relatively simple colloidal route. SEM and TEM analyses showed that the 3D nanoflowers that were initially formed disintegrated into 2D nanosheets after prolonged incubation. XPS and XRD analyses confirmed oxidation of WS2 into WO3. Sensors based on these oleylamine capped WS2 nanoflowers and nanosheets still showed a change in electrical response towards various concentrations of NH3 vapour at room temperature in a 25% relative humidity background despite the oxidation. The nanoflowers exhibited n-type response while the nanosheets displayed a p-type response towards NH3 exposure. The nanoflower based sensors showed better response to NH3 vapour exposure than the nanosheets. The sensors showed a good selectivity towards NH3 relative to acetone, ethanol, chloroform and toluene. Meanwhile, a strong interference of humidity to the NH3 response was displayed at high relative humidity levels. The results demonstrated that oleylamine limited the extent of oxidation of WS2 nanostructures. The superior sensing performance of the nanoflowers can be attributed to their hierarchical morphology which enhances the surface area and diffusion of the analyte.

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Humidity sensing properties of the hydrothermally synthesized WS2-modified SnO2 hybrid nanocomposite

Cited by 49 publications

References 20 publications

Tungsten disulfide: synthesis and applications in electrochemical energy storage and conversion

Tungsten disulfide: synthesis and applications in electrochemical energy storage and conversion

Elaeocarpus Ganitrus Structured Mesoporous Hybrid Mn^3+/4+ loaded Zirconia Self Assembly as a Versatile Amperometric Probe for the Electrochemical Detection of Nitrite

Limiting the Oxidation of WS2 Nanostructures by Oleylamine Surface Passivation for Room Temperature NH3 Sensing

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Humidity sensing properties of the hydrothermally synthesized WS2-modified SnO2 hybrid nanocomposite

Cited by 49 publications

References 20 publications

Tungsten disulfide: synthesis and applications in electrochemical energy storage and conversion

Tungsten disulfide: synthesis and applications in electrochemical energy storage and conversion

Elaeocarpus Ganitrus Structured Mesoporous Hybrid Mn3+/4+ loaded Zirconia Self Assembly as a Versatile Amperometric Probe for the Electrochemical Detection of Nitrite

Limiting the Oxidation of WS2 Nanostructures by Oleylamine Surface Passivation for Room Temperature NH3 Sensing

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Elaeocarpus Ganitrus Structured Mesoporous Hybrid Mn^3+/4+ loaded Zirconia Self Assembly as a Versatile Amperometric Probe for the Electrochemical Detection of Nitrite