Application of HF etching in a HRTEM study of supported MoS2 catalysts

Li, Yanpeng; Li, Aiting; Li, Feifei; Liu, Dapeng; Chai, Yong‐Ming; Liu, Chenguang

doi:10.1016/j.jcat.2014.06.007

Cited by 39 publications

(20 citation statements)

References 47 publications

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“…The connection between MgFe 2 O 4 and MoS 2 was very tight, and the unique structure would be advantageous to reduce the defects of the interface and increase the separation of the photogenerated charges. The MoS 2 nanosheet was further identified through HRTEM (Figure f), where the lattice fringes were 0.27 nm, corresponding to the MoS 2 (101) crystal face. − …”

Section: Resultsmentioning

confidence: 99%

Fabrication of MgFe₂O₄/MoS₂ Heterostructure Nanowires for Photoelectrochemical Catalysis

Fan

Bai

et al. 2016

Langmuir

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A novel one-dimensional MgFe2O4/MoS2 heterostructure has been successfully designed and fabricated. The bare MgFe2O4 was obtained as uniform nanowires through electrospinning, and MoS2 thin film appeared on the surface of MgFe2O4 after further chemical vapor deposition. The structure of the MgFe2O4/MoS2 heterostructure was systematic investigated by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectrometry (XPS), and Raman spectra. According to electrochemical impedance spectroscopy (EIS) results, the MgFe2O4/MoS2 heterostructure showed a lower charge-transfer resistance compared with bare MgFe2O4, which indicated that the MoS2 played an important role in the enhancement of electron/hole mobility. MgFe2O4/MoS2 heterostructure can efficiently degrade tetracycline (TC), since the superoxide free-radical can be produced by sample under illumination due to the active species trapping and electron spin resonance (ESR) measurement, and the optimal photoelectrochemical degradation rate of TC can be achieved up to 92% (radiation intensity: 47 mW/cm(2), 2 h). Taking account of its unique semiconductor band gap structure, MgFe2O4/MoS2 can also be used as an photoelectrochemical anode for hydrogen production by water splitting, and the hydrogen production rate of MgFe2O4/MoS2 was 5.8 mmol/h·m(2) (radiation intensity: 47 mW/cm(2)), which is about 1.7 times that of MgFe2O4.

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Section: Resultsmentioning

confidence: 99%

Fabrication of MgFe₂O₄/MoS₂ Heterostructure Nanowires for Photoelectrochemical Catalysis

Fan

Bai

et al. 2016

Langmuir

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“…Because of the p-π conjugate effect, the organics intercalated into the MoS 2 layers and widen the layer spacing. The curved structure is caused by the formation of coordinated structure between the organics and the MoS 2 [36][37][38][39]. With increasing the synthesis temperature (170 -200 °C), the layers length for samples (Solvo-IV-2, Solvo-III-2, and Solvo-II-2) maintained around 6-7 nm and the average stacking number ranged from 1 to 1.4 respectively (Figure 6c, d).…”

Section: Characterization Of Intercalated and Multilayer Mos 2 Samplesmentioning

confidence: 96%

Design of an intercalated Nano-MoS2 hydrophobic catalyst with high rim sites to improve the hydrogenation selectivity in hydrodesulfurization reaction

Sun

Guo

Jiao

et al. 2021

Applied Catalysis B: Environmental

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The preparation of the intercalated lamellar hydrophobic nano-MoS 2 (size: 60-100 nm, interlayer spacing: 0.7-1.2 nm) through the substitution of organic amine for inorganic ammonium salt and the subsequent catalytic reaction as a hydrodesulfurization catalyst is presented. The intercalated amine groups broadened the interspacing of the lamellar nano-MoS 2 and promoted the formation of hydrophobic stacking structure consisting of stable monolayers. The high hydrophobicity of the nano-MoS 2 monolayer catalyst was confirmed. The as-synthesized intercalated hydrophobic nano-MoS 2 catalyst with lower steric hindrance and higher number of rim sites showed better hydrodesulfurization performance and higher hydrogenation route selectivity than the traditional MoS 2 catalyst. The conversion of dibenzothiophene using the intercalated hydrophobic nano-MoS 2 catalyst was 86% in comparison to 23% for the traditional MoS 2 catalyst. The intercalated hydrophobic nano-MoS 2 catalyst was stable in five subsequent catalytic cycles.

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“…The orientation of MoS 2 slabs on alumina has also been debated for a long time and the question is still not entirely resolved. Model supports are essential for elucidating this issue because the porous structure of conventional γ‐Al 2 O 3 supports as well as the poor contrast in conventional TEM applied to powders (which limits the use of the latter techniques to the observation of MoS 2 slabs parallel to the electron beam) hampers a clear distinction between basal or edge bonded MoS 2 slabs.…”

Section: Contribution Of Model Planar Supports To the Description Ofmentioning

confidence: 99%

Surface Science Approaches for the Preparation of Alumina‐Supported Hydrotreating Catalysts

et al. 2015

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Application of HF etching in a HRTEM study of supported MoS2 catalysts

Cited by 39 publications

References 47 publications

Fabrication of MgFe₂O₄/MoS₂ Heterostructure Nanowires for Photoelectrochemical Catalysis

Fabrication of MgFe₂O₄/MoS₂ Heterostructure Nanowires for Photoelectrochemical Catalysis

Design of an intercalated Nano-MoS2 hydrophobic catalyst with high rim sites to improve the hydrogenation selectivity in hydrodesulfurization reaction

Surface Science Approaches for the Preparation of Alumina‐Supported Hydrotreating Catalysts

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Application of HF etching in a HRTEM study of supported MoS2 catalysts

Cited by 39 publications

References 47 publications

Fabrication of MgFe2O4/MoS2 Heterostructure Nanowires for Photoelectrochemical Catalysis

Fabrication of MgFe2O4/MoS2 Heterostructure Nanowires for Photoelectrochemical Catalysis

Design of an intercalated Nano-MoS2 hydrophobic catalyst with high rim sites to improve the hydrogenation selectivity in hydrodesulfurization reaction

Surface Science Approaches for the Preparation of Alumina‐Supported Hydrotreating Catalysts

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Product

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Fabrication of MgFe₂O₄/MoS₂ Heterostructure Nanowires for Photoelectrochemical Catalysis

Fabrication of MgFe₂O₄/MoS₂ Heterostructure Nanowires for Photoelectrochemical Catalysis