Enhanced optical, magnetic and hydrogen evolution reaction properties of Mo1−xNixS2 nanoflakes

Chacko, Levna; Rastogi, Pankaj Kumar; Narayanan, Tharangattu N.; Jayaraj, M. K.; Aneesh, P. M.

doi:10.1039/c9ra01869g

Cited by 14 publications

(4 citation statements)

References 59 publications

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“…In the Raman spectra, the peaks at 207.8, 410.8, and 598.3 cm −1 are assigned to Ti 3 C 2 T x -few. 39 The intensity of Ti 3 C 2 T xmulti decreases compared with that of Ti 3 C 2 T x -few in Raman spectra (Figure 5e) due to surface reconstruction and vibrational softening, 40 which is consistent with the previous results. 39 In the Raman spectra of Ga The photo-to-dark current ratio (PDCR) is a critical parameter for evaluating the amplification rate and partial discharge sensitivity of the photodetector and is determined by eq 2 6…”

Section: Resultssupporting

confidence: 90%

“…In the Raman spectra, the peaks at 207.8, 410.8, and 598.3 cm –1 are assigned to Ti 3 C 2 T x -few . The intensity of Ti 3 C 2 T x -multi decreases compared with that of Ti 3 C 2 T x -few in Raman spectra (Figure e) due to surface reconstruction and vibrational softening, which is consistent with the previous results . In the Raman spectra of Ga 2 O 3 –5Ti 3 C 2 T x , the peaks at 166.1, 200.2, 345.3, 470.4, 644.7, and 758.2 cm –1 are indexed to Ga 2 O 3 , and the peaks at 410.8 cm –1 correspond to Ti 3 C 2 T x -few (Figure f), further verifying the synthesis of the Ga 2 O 3 –5Ti 3 C 2 T x heterostructure.…”

Section: Resultssupporting

confidence: 90%

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Ga₂O₃–MXene Nanowire Networks with Enhanced Responsivity for Deep-UV Photodetection

et al. 2023

ACS Appl. Nano Mater.

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Ga 2 O 3 is a promising semiconductor for solar-blind (200−280 nm) photodetectors. Two-dimensional (2D) MXenes have been widely applied in the optoelectronic area owing to their high conductivity and large specific surface area. The few-layered Ti 3 C 2 T x (Ti 3 C 2 T x -few) exhibits elevated properties compared with multilayered Ti 3 C 2 T x . Herein, we innovatively adopt a hydrothermal method to prepare Ti 3 C 2 T x -few. A Ga 2 O 3 −Ti 3 C 2 T x 3D network heterojunction is fabricated by van der Waals interaction between one-dimensional (1D) nanowires and 2D nanosheets using the light trapping effect at the interface of the heterostructure. The van der Waals force between Ga 2 O 3 and Ti 3 C 2 T x -few enhances the contact for the transfer of photoelectrons. The optimal Ga 2 O 3 −5Ti 3 C 2 T x exhibits enhanced responsivity (140.57 mA W −1 ), defectivity (4.87 × 10 12 Jones), and external quantum efficiency (68.66%), which are 6.67, 3.20, and 6.68 times higher than that of pure Ga 2 O 3 nanowires under deepultraviolet light (254 nm). The improved properties of Ga 2 O 3 −xTi 3 C 2 T x heterostructure are attributed to the high conductivity of Ti 3 C 2 T x -few, enhanced separation of photogenerated electrons and holes, decreased Schottky barrier height, enlarged depletion region, increased UV light absorption, and enhanced contact via van der Waals force between Ga 2 O 3 and Ti 3 C 2 T x . In conclusion, the Ga 2 O 3 −Ti 3 C 2 T x heterojunction extends the application of Ti 3 C 2 T x -few and provides a new tactic to improve the performance of the Ga 2 O 3 -based photodetector.

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Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 90%

Ga₂O₃–MXene Nanowire Networks with Enhanced Responsivity for Deep-UV Photodetection

et al. 2023

ACS Appl. Nano Mater.

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“…The specific surface area and porosity were examined using the Brunauer–Emmett–Teller (BET) method, which involved studying the adsorption and desorption of nitrogen (N 2 ) at various relative pressures ( P / P o ) ranging from 0 to 1, as depicted in Figure a. Under high relative pressure, the nitrogen adsorption/desorption isotherms of both the pristine and Ni-doped samples exhibit a type III hysteresis loop, which is commonly associated with the process of adsorption and desorption . Pristine MoS 2 , 1, 5, 10, and 20% exhibited a surface area of 20.570, 24.771, 27.643, 34.212, and 16.407 m 2 /g, respectively.…”

Section: Resultsmentioning

confidence: 99%

Single-Step Synthesis of Ni-Doped MoS₂ Nanostructures for Symmetrical Supercapacitor Devices

Panghal,

Sahoo,

Deepak

et al. 2024

ACS Appl. Nano Mater.

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As a contemporary and futuristic alternative to batteries, conventional supercapacitors (SCs) offer a potential candidate for renewable energy applications. Nevertheless, research present in this report focuses on the fabrication of highperformance quasi-solid-state supercapacitors (QSSCs) by hydrothermal means of nickel-doped MoS 2 pompom-like nanostructures with varying nickel dopant concentrations (0, 1, 5, 10, and 20%). Optimal nickel concentrations are used to tune electrical conductivity, which affects electrochemical (EC) performance. With an excellent cycling stability of 77.83% after 5000 cycles, the 10% Ni-doped device presents an excellent specific capacitance of 156.8 mF cm −2 at 4 mA cm −2 . The excellent EC properties of Nidoped MoS 2 pompom nanostructures allow them to be used as efficient electrode materials for SC applications and other related areas.

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“…Several reports have already reported the viability of using MoS 2 as a catalyst for hydrogen evolution reaction. [5][6][7] MoS 2 is a hexagonally packed layered structure, with a strong Mo-S covalent bond and weak van der Waals interaction among the individual S-Mo-S layers. The surface of MoS 2 consists of catalytically active edge sites and basal planes which are inert.…”

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confidence: 99%

MoS₂-TiO₂ Nanocomposites for Enhanced Photo-electrocatalytic Hydrogen Evolution

Chacko

Joseph

Tadi

et al. 2023

J. Electrochem. Soc.

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The investigation on the designing and fabrication of highly efficient electrocatalysts for hydrogen evolution reaction (HER) is critical for future applications in renewable sustainable energy. The present work reports the hydrothermal synthesis of two-dimensional MoS2 and MoS2-TiO2 nanostructures. The as-prepared nanostructures were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Raman analysis, UV-Vis-NIR, and photoluminescence spectrophotometry and vibrating sample magnetometer (VSM). Systematic electrochemical measurements for HER were performed and MoS2-TiO2 nanocomposites demonstrated the lowest onset potential in comparison with MoS2. The results suggest that the nanofusion interface between MoS2 nanoflakes and TiO2 nanoparticles induced an efficient charge transfer from the conduction band of MoS2 to TiO2 and favored the reduction of H+ at active sites and in addition witnessed chemical transformation into MoS2-MoO3-TiO2, further initiating enhanced electrocatalytic activity even after stopping the light irradiation. We believe the present work can open up new possibilities that would provide deep insights for the rational design of 2D materials-based catalysts for energy storage and conversion applications.

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Enhanced optical, magnetic and hydrogen evolution reaction properties of Mo_1−xNi_xS₂ nanoflakes

Abstract: Hydrothermal synthesis of Mo1–xNixS2 nanostructures as efficient catalyst for hydrogen evolution reaction.

Cited by 14 publications

References 59 publications

Ga₂O₃–MXene Nanowire Networks with Enhanced Responsivity for Deep-UV Photodetection

Ga₂O₃–MXene Nanowire Networks with Enhanced Responsivity for Deep-UV Photodetection

Single-Step Synthesis of Ni-Doped MoS₂ Nanostructures for Symmetrical Supercapacitor Devices

MoS₂-TiO₂ Nanocomposites for Enhanced Photo-electrocatalytic Hydrogen Evolution

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Enhanced optical, magnetic and hydrogen evolution reaction properties of Mo1−xNixS2 nanoflakes

Abstract: Hydrothermal synthesis of Mo1–xNixS2 nanostructures as efficient catalyst for hydrogen evolution reaction.

Cited by 14 publications

References 59 publications

Ga2O3–MXene Nanowire Networks with Enhanced Responsivity for Deep-UV Photodetection

Ga2O3–MXene Nanowire Networks with Enhanced Responsivity for Deep-UV Photodetection

Single-Step Synthesis of Ni-Doped MoS2 Nanostructures for Symmetrical Supercapacitor Devices

MoS2-TiO2 Nanocomposites for Enhanced Photo-electrocatalytic Hydrogen Evolution

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Enhanced optical, magnetic and hydrogen evolution reaction properties of Mo_1−xNi_xS₂ nanoflakes

Ga₂O₃–MXene Nanowire Networks with Enhanced Responsivity for Deep-UV Photodetection

Ga₂O₃–MXene Nanowire Networks with Enhanced Responsivity for Deep-UV Photodetection

Single-Step Synthesis of Ni-Doped MoS₂ Nanostructures for Symmetrical Supercapacitor Devices

MoS₂-TiO₂ Nanocomposites for Enhanced Photo-electrocatalytic Hydrogen Evolution