Flower-like MoS2 on graphitic carbon nitride for enhanced photocatalytic and electrochemical hydrogen evolutions

Liu, Yazi; Xu, Xinyuan; Zhang, Jinqiang; Zhang, Huayang; Tian, Wenjie; Li, Xiaojie; Tade, Moses O.; Sun, Hongqi; Wang, Shaobin

doi:10.1016/j.apcatb.2018.08.028

Cited by 171 publications

(60 citation statements)

References 67 publications

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“…The optical absorption intensity in visible-light region increased with a rise in Ru loading. According to similar reports from other researchers [28,29] and the low Ru loadings in xRu/3DOM BiVO 4 , it is reasonably deduced that the bandgap energies listed in Table 2 could represent those of the xRu/ 3DOM BiVO 4 composite samples. Bandgap energies (E g ) of the samples estimated according to the Kubelka-Munk equation (Figure S2(B)) are listed in Table 2.…”

Section: Resultssupporting

confidence: 70%

Ru Nanoparticles Supported on Oxygen‐Deficient 3DOM BiVO₄: High‐Performance Catalysts for the Visible‐Light‐Driven Selective Oxidation of Benzyl Alcohol

et al. 2019

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Developing novel photocatalysts for green synthesis of important organic intermediates under mild conditions is of great significance in industry. In this work, we synthesized the oxygen-deficient three-dimensionally ordered macroporous (3DOM) BiVO 4 -supported nanosized Ru (xRu/3DOM BiVO 4 , x = 0.24-2.16 wt %) catalysts by the polymethyl methacrylatetemplating, ethylene glycol reduction, and post-thermal treatment methods. Physicochemical properties of the materials were characterized using the various techniques, and their catalytic activities for the visible-light-driven selective oxidation of benzyl alcohol to benzaldehyde were measured. It is found that the Ru nanoparticles (NPs) with a size of 1.2-1.5 nm were uniformly dispersed on the surface of 3DOM BiVO 4 , which gave rise to a significant enhancement in photocatalytic activity.Benzyl alcohol conversion first went up and then dropped down with the rise in loading of Ru NPs. The 0.95Ru/3DOM BiVO 4 À Ar-300 sample was thermally treated in an Ar flow at 300°C for 4 h showed the highest benzyl alcohol conversion (78 %) with a benzaldehyde selectivity of 100 % (benzaldehyde formation rate was 1380 μmol/(g h) after 6 h of illumination) and good photocatalytic stability. The high dispersion of Ru NPs and formation of oxygen vacancies in 3DOM BiVO 4 improved separation and transfer efficiency of the photogenerated electrons/holes and increased the superoxide radical concentration. In addition, the possible mechanism of benzyl alcohol oxidation over 0.95Ru/3DOM BiVO 4 À Ar-300 was also discussed.

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Section: Resultssupporting

confidence: 70%

Ru Nanoparticles Supported on Oxygen‐Deficient 3DOM BiVO₄: High‐Performance Catalysts for the Visible‐Light‐Driven Selective Oxidation of Benzyl Alcohol

et al. 2019

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“…[10][11][12] However, the inherent large band gap of MoS 2 leads to poor electron transport, thus resulting al arge HER overpotential. With cost-effectiveness and high electrocatalytic performance, non-noblem etal molybdenum disulfide (MoS 2 )n anosheets have been extensively investigated as an efficient catalyst in HER.…”

Section: Introductionmentioning

confidence: 99%

Pore Surface Engineering of Covalent Triazine Frameworks@MoS₂ Electrocatalyst for the Hydrogen Evolution Reaction

Qiao

Zhang

et al. 2019

ChemSusChem

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Electrochemical water splitting is an important strategy for the mass production of hydrogen. Development of synthesizable catalysts has always been one of the biggest obstacles to replace platinum‐group catalysts. In this work, a high quality crystal polymer covalent triazine framework [CTF; Brunauer–Emmett–Teller (BET) surface area of 1562.6 m2 g−1] is synthesized and MoS2 nanoparticles are grown in situ into/onto the 1 D channel arrays or the external surface for electrocatalysis [hydrogen evolution reaction (HER)] . The state‐of‐the‐art CTFs@MoS2 structure exhibits superior catalytic kinetics with an overpotential of 93 mV and Tafel slope of 43 mV dec−1, which is improved over most other reported analogous catalysts. The inherent π‐conjugated crystal channels in CTFs provides a multifunctional support for electron transmission and mass diffusion during the hydrogen evolution process. Catalytic kinetics analysis shows that the HER performance is closely correlated to the hierarchical pore parameters and aggregated thickness of MoS2 nanoparticles. This work provides an attractive and durable alternative to synthesize high activity and stable catalysts for HER.

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“…Figure shows the XRD patterns of the single MoS 2 , g‐C 3 N 4 , binary GO/MoS 2 and ternary GO/MoS 2 /g‐C 3 N 4 samples, and all diffraction peaks could be indexed as “★” of g‐C 3 N 4 and “•” of MoS 2 . The distinct diffraction peaks of MoS 2 could be found at 32.8° and 58.0° corresponding to (100) and (110) planes of MoS 2 (JCPDS 37–1492), respectively . By comparison, the peak at 13.1° and 27.8° of g‐C 3 N 4 and GO/MoS 2 /g‐C 3 N 4 could be indexed as (100) and (002) diffraction planes (JCPDS 87–1526) .…”

Section: Resultsmentioning

confidence: 99%

Construction of 3D Hierarchical GO/MoS₂/g‐C₃N₄ Ternary Nanocomposites with Enhanced Visible‐Light Photocatalytic Degradation Performance

Song

Wang

et al. 2019

ChemistrySelect

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Hierarchical graphene oxide/molybdenum sulphide/carbon nitride (GO/MoS2/g‐C3N4) ternary nanostructure with visible‐light‐driven photocatalytic property are prepared employing a simple and facile solvothermal method. Systematical characterizations like transmission electron microscopy (TEM), X‐ray diffraction (XRD), Fourier transform infrared spectra (FTIR), UV‐vis diffuse reflectance spectra (DRS), and photoluminescence spectra, have been carried out to figure out composition, structure and optical properties of the ternary composites, accompanied with their physical and chemical interface state among GO, MoS2 and g‐C3N4. The GO/MoS2/g‐C3N4 ternary photocatalyst exhibits excellent visible‐light‐induced photocatalytic activity for Rhodamine B (RhB) degradation reaching up to 96.7%. More significantly, the hierarchical nanostructured ternary system shows good photostability and reusability with a minor degradation of 1.5%. The enhanced visible‐light photodegradation properties would be owing to the synergetic effects of GO, MoS2 and g‐C3N4 in the hierarchical ternary GO/MoS2/g‐C3N4 nanocomposites favourable for the photogenerated electrons‐holes separation and transfer. In addition, the surface reaction species is also confirmed by the trapping experiments and a reaction mechanism is proposed.

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Flower-like MoS2 on graphitic carbon nitride for enhanced photocatalytic and electrochemical hydrogen evolutions

Cited by 171 publications

References 67 publications

Ru Nanoparticles Supported on Oxygen‐Deficient 3DOM BiVO₄: High‐Performance Catalysts for the Visible‐Light‐Driven Selective Oxidation of Benzyl Alcohol

Ru Nanoparticles Supported on Oxygen‐Deficient 3DOM BiVO₄: High‐Performance Catalysts for the Visible‐Light‐Driven Selective Oxidation of Benzyl Alcohol

Pore Surface Engineering of Covalent Triazine Frameworks@MoS₂ Electrocatalyst for the Hydrogen Evolution Reaction

Construction of 3D Hierarchical GO/MoS₂/g‐C₃N₄ Ternary Nanocomposites with Enhanced Visible‐Light Photocatalytic Degradation Performance

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Flower-like MoS2 on graphitic carbon nitride for enhanced photocatalytic and electrochemical hydrogen evolutions

Cited by 171 publications

References 67 publications

Ru Nanoparticles Supported on Oxygen‐Deficient 3DOM BiVO4: High‐Performance Catalysts for the Visible‐Light‐Driven Selective Oxidation of Benzyl Alcohol

Ru Nanoparticles Supported on Oxygen‐Deficient 3DOM BiVO4: High‐Performance Catalysts for the Visible‐Light‐Driven Selective Oxidation of Benzyl Alcohol

Pore Surface Engineering of Covalent Triazine Frameworks@MoS2 Electrocatalyst for the Hydrogen Evolution Reaction

Construction of 3D Hierarchical GO/MoS2/g‐C3N4 Ternary Nanocomposites with Enhanced Visible‐Light Photocatalytic Degradation Performance

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Ru Nanoparticles Supported on Oxygen‐Deficient 3DOM BiVO₄: High‐Performance Catalysts for the Visible‐Light‐Driven Selective Oxidation of Benzyl Alcohol

Ru Nanoparticles Supported on Oxygen‐Deficient 3DOM BiVO₄: High‐Performance Catalysts for the Visible‐Light‐Driven Selective Oxidation of Benzyl Alcohol

Pore Surface Engineering of Covalent Triazine Frameworks@MoS₂ Electrocatalyst for the Hydrogen Evolution Reaction

Construction of 3D Hierarchical GO/MoS₂/g‐C₃N₄ Ternary Nanocomposites with Enhanced Visible‐Light Photocatalytic Degradation Performance