Effects of Precursor Concentration on Morphology of MoS2 Nanosheets by Hydrothermal Synthesis

Min, Lee Chang; Chul, Park Geun; Muk, Lee Seung; Hyuk, Choi Jun; Hyeon, Jeong Sang; Yang, Seo Tae; Jung, Sin‐Ho; Hyung, Lim Jun; Joo, Jin Chul

doi:10.1166/jnn.2016.13549

Cited by 20 publications

(9 citation statements)

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“…These measurements were obtained from over 30 sheets. As noted in our previous study, as the precursor concentration increased, the growth rate increased more rapidly than the nucleation rate, resulting in a larger crystal size at higher concentration. Moreover, the increase in precursor concentration with a constant HCl concentration reduced the ratio of hydrogen ion (H + ) to precursor, and hence decreasing the amount of H + adsorption (capping) on the MoS 2 surface.…”

Section: Resultssupporting

confidence: 74%

“…Hydrothermal method is promising for the synthesis of MoS 2 nanosheets because the morphology, crystallinity, and defect state can be conveniently changed by controlling precursor concentration, pH, and addition of surfactant . Li et al have reported that the sheet size is increased with increasing precursor concentration because the growth rate of MoS 2 is higher than the nucleation rate .…”

Section: Introductionmentioning

confidence: 99%

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Effects of Precursor Concentration on Dimensional Size, Defect State, and Gas Sensing Performance of MoS₂ Sheets Synthesized by Hydrothermal Method

Lee

Park

Ahn

et al. 2018

Physica Status Solidi (a)

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The objective of this study is to investigate effects of precursor concentration on dimensional size, defect state, and gas sensing performance of MoS 2 sheets synthesized by hydrothermal method with various precursor concentrations (0.14-1.4 M) in fixed HCl solution (7 M). The MoS 2 sheets show a defect-rich and strained structure. When precursor concentration is increased, dimensional size of the sheet is increased while the specific surface area of the sheet is decreased. The MoS 2 sensor made with 0.14 M precursor solution exhibits superior sensing performance with high sensitivity (372%) and rapid recovery time (<16 min) at room temperature in a 500 ppm NO 2 gas atmosphere due to enhanced active site resulting from the highest specific surface area. In addition, all MoS 2 samples show a complete recovery after response to NO 2 gas probably related to the defective and strained surface resulting from the use of HCl surfactant.

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Section: Resultssupporting

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Effects of Precursor Concentration on Dimensional Size, Defect State, and Gas Sensing Performance of MoS₂ Sheets Synthesized by Hydrothermal Method

Lee

Park

Ahn

et al. 2018

Physica Status Solidi (a)

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“…But due to the very low concentration, the peaks corresponding to MoS 2 (at 2θ values of 14.5°(002), 34°(102), and 59°(110)) have very low intensity. 22,24 So Raman spectra were analyzed to show the presence of MoS 2 .…”

Section: Structural and Morphological Characterizationsmentioning

confidence: 99%

Interface Induced High-Performance Piezoelectric Nanogenerator Based on a Electrospun Three-Phase Composite Nanofiber for Wearable Applications

Muduli

Veeralingam

Badhulika

2021

ACS Appl. Energy Mater.

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Polymer based composites are the backbone of piezoelectric flexible devices, but the use of toxic compounds or requirement of high voltage poling are the Achilles’ heel of this field. Herein, a lead-free, self-poled, flexible, high performance piezoelectric nanogenerator (PENG) is demonstrated based on a poly(vinylidene fluoride) (PVDF)–ZnSnO3–MoS2 free-standing electrospun nanofiber mat. ZnSnO3 and MoS2 were synthesized by a hydrothermal route, and a composite nanofiber mat was prepared by the electrospinning method. The structural study revealed an enhancement of the electroactive β-phase of PVDF due to inclusion of MoS2. With the optimized concentration of MoS2, the fabricated piezoelectric device can generate open-circuit voltage, short circuit current, and an instantaneous power density of 26 V, 0.5 μA, and 28.9 mW m–2, respectively, with gentle finger tapping. This power density is almost 18 times more than that of PENG made out of pristine PVDF, and the enhancement in the performance is attributed to the synergistic effect of interfacial action due to the piezoceramic (ZnSnO3) and MoS2 in the PVDF matrix. Both ZnSnO3 and MoS2 interact with −CF and −CH dipoles of PVDF to mobilize the bonds to enhance the electroactive phase of PVDF. Biomechanical energy harvesting, sensing of movement of different body parts, and real-time application such as charging capacitors and powering a calculator were demonstrated using the as-fabricated nanogenerator. The device showed reliable performance when tested for 3000 cycles and durability over 50 days of storage. This superior performance and robustness of the device make the PVDF–ZnSnO3–MoS2 based electrospun nanofiber mat an ideal candidate for energy harvesting and sensing applications.

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“…Spherical flower like MoS 2 nanostructure is obtained keeping the stoichiometry of precursors as 1 : 2 (Mo : S), and high sulfur ratio with respect to molybdenum suppresses the growth of flower like MoS 2 . 34,45 The TEM microscale images (Fig. 3(c)) of MoS 2 flowers show that petals are entangled to form flowers.…”

Section: Characterization Of Mos 2 S-mos 2 and Membranesmentioning

confidence: 99%

Sulfonated poly(ether sulfone) based sulfonated molybdenum sulfide composite membranes: proton transport properties and direct methanol fuel cell performance

et al. 2020

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Effects of Precursor Concentration on Morphology of MoS2 Nanosheets by Hydrothermal Synthesis

Cited by 20 publications

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Effects of Precursor Concentration on Dimensional Size, Defect State, and Gas Sensing Performance of MoS₂ Sheets Synthesized by Hydrothermal Method

Effects of Precursor Concentration on Dimensional Size, Defect State, and Gas Sensing Performance of MoS₂ Sheets Synthesized by Hydrothermal Method

Interface Induced High-Performance Piezoelectric Nanogenerator Based on a Electrospun Three-Phase Composite Nanofiber for Wearable Applications

Sulfonated poly(ether sulfone) based sulfonated molybdenum sulfide composite membranes: proton transport properties and direct methanol fuel cell performance

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Effects of Precursor Concentration on Morphology of MoS2 Nanosheets by Hydrothermal Synthesis

Cited by 20 publications

References 0 publications

Effects of Precursor Concentration on Dimensional Size, Defect State, and Gas Sensing Performance of MoS2 Sheets Synthesized by Hydrothermal Method

Effects of Precursor Concentration on Dimensional Size, Defect State, and Gas Sensing Performance of MoS2 Sheets Synthesized by Hydrothermal Method

Interface Induced High-Performance Piezoelectric Nanogenerator Based on a Electrospun Three-Phase Composite Nanofiber for Wearable Applications

Sulfonated poly(ether sulfone) based sulfonated molybdenum sulfide composite membranes: proton transport properties and direct methanol fuel cell performance

Contact Info

Product

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Effects of Precursor Concentration on Dimensional Size, Defect State, and Gas Sensing Performance of MoS₂ Sheets Synthesized by Hydrothermal Method

Effects of Precursor Concentration on Dimensional Size, Defect State, and Gas Sensing Performance of MoS₂ Sheets Synthesized by Hydrothermal Method