In situ synthesis of a MoS<sub>2</sub>/CoOOH hybrid by a facile wet chemical method and the catalytic oxidation of CO in epoxy resin during decomposition

Feng, Xiaming; Xing, Weiyi; Song, Lei; Hu, Yuan

doi:10.1039/c4ta01885k

Cited by 134 publications

(69 citation statements)

References 46 publications

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“…From Table , compared to pristine PU, the initial degradation of PU composites clearly decreased and this trend becomes stronger with increasing M‐MoS 2 content in the PU matrix. This is in agreement with a previous report, because MoS 2 and M‐MoS 2 act as catalysts to accelerate the early‐stage thermal degradation of polymer to form a thermally insulating char. Moreover, MoS 2 nanosheets in the polymer matrix increase the viscosity and rapidly increase the surface temperature during heating, while the physical barrier effect of MoS 2 nanosheets allows quick polymer decomposition .…”

Section: Resultssupporting

confidence: 93%

“…During thermal degradation, the released NCO compound was captured by melamine to form the cross‐linked char; hence, it is possible to reduce the degradation toxicity with decreasing NCO evolution. Another possibility is the distribution of intercalated and agglomerated M‐MoS 2 nanosheets in the composite, which could act as a strong physical barrier to lower the transfer of combustible pyrolysis components and oxygen . Hence, the M‐MoS 2 nanosheets may have a positive impact on the FR performance of polymer composites.…”

Section: Resultsmentioning

confidence: 99%

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Enhanced Thermo‐Mechanical Stiffness, Thermal Stability, and Fire Retardant Performance of Surface‐Modified 2D MoS₂Nanosheet‐Reinforced Polyurethane Composites

Malkappa

Ray

Kumar

2018

Macro Materials & Eng

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This article reports new‐generation 2D‐MoS2 nanosheet‐containing polyurethane (PU) composite materials with improved thermo‐mechanical stiffness, thermal stability, and fire retardation properties. The surface of 2D‐MoS2 nanosheets is modified with melamine (M‐MoS2), and then PU composites with varying M‐MoS2 loadings are synthesized using an in situ polymerization method. During polymerization, 3‐amino‐propyl‐trimethoxy silane is introduced to create silicate functionality on the PU chains, which further improves the compatibility between PU and M‐MoS2. Microscopy studies confirm the distribution of highly intercalated and agglomerated M‐MoS2 nanosheets in the PU matrix. The PU composite containing 5 wt% M‐MoS2 shows a 65% higher storage modulus (at 30 °C) than that of pure PU. The thermal stability of pure PU is significantly improved (62 °C) after composite formation. Thermogravimetric analysis in combination with FTIR spectroscopy shows that the PU/M‐MoS2 composites release less toxic gases during thermal degradation compared to pure PU. Moreover, the composite containing 5 wt% M‐MoS2 shows improved fire retardation properties, with 45% and 67.5% decrease in the peak heat and total heat release rates, respectively, as compared with those of pure PU. In summary, 2D‐MoS2 is shown to have potential as an advanced nano‐filler to obtain stiffer PU composite with improved fire retardant property for structural application.

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Enhanced Thermo‐Mechanical Stiffness, Thermal Stability, and Fire Retardant Performance of Surface‐Modified 2D MoS₂Nanosheet‐Reinforced Polyurethane Composites

Malkappa

Ray

Kumar

2018

Macro Materials & Eng

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“…[19] The absorption peaks located at 1170 and 1107 cm À1 confirmt he formation of complex sulfur with the actives ites in the MoS 2 . [20] In addition, the absorption band in the range of 430-490 cm À1 for MZ can be indexedt ot he stretching bendingo fZ n ÀO, which is blueshifted from 410 cm À1 of ZnÀOi nu rchin-like ZnO. Furthermore, the degree of blueshift was influenced by the molar ratios of Mo and Zn.…”

Section: Resultsmentioning

confidence: 98%

“…The weak peak at 853 cm −1 corresponds to Zn−O stretching vibration and the peaks at 412 and 1387 cm −1 are derived from the ZnO formation . The absorption peaks located at 1170 and 1107 cm −1 confirm the formation of complex sulfur with the active sites in the MoS 2 . In addition, the absorption band in the range of 430–490 cm −1 for MZ can be indexed to the stretching bending of Zn−O, which is blueshifted from 410 cm −1 of Zn−O in urchin‐like ZnO.…”

Section: Resultsmentioning

confidence: 99%

Dual II Heterojunctions Metallic Phase MoS₂/ZnS/ZnO Ternary Composite with Superior Photocatalytic Performance for Removing Contaminants

Zhao

2019

Chemistry A European J

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Fabricating a high‐performance photocatalyst to efficiently solve serious environmental problems is an urgent affair. Herein, a series of MoS2/ZnO composites were successfully fabricated through a facile hydrothermal route using Na2MoO4, (NH2)2CS and urchin‐like ZnO as precursors. According to the results of XRD and XPS, it was found that ZnS appeared in MoS2/ZnO composite; meanwhile, the content was positively correlated with the weight of the precursor (NH2)2CS. It should be noted that the morphology and the metallic phase content of MoS2 grown in situ on the surface of ZnO were affected by the molar ratio of Na2MoO4 and ZnO. Benefiting from the special dual II heterojunctions of MoS2/ZnS/ZnO ternary composite, the material exhibited excellent charge separation and transfer performances. In the photocatalytic measurements, the MoS2/ZnS/ZnO (Na2MoO4:ZnO 1:2 MZ2) composite not only exhibits excellent photocatalytic CrVI reduction activity of 42.3×10−3 min−1, but also displays remarkable adsorption performance (nearly 32.1 %) for Cr2O2-7 . In addition, the ternary composite shows dominant photocatalytic CrVI reduction activities compared to other photocatalysts. This work provides a high‐efficient MoS2/ZnS/ZnO ternary photocatalyst for environmental treatment.

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“…The formation procedure and possible mechanism of the CuS/MoS 2 composite were discussed as follows (Feng et al 2014). First, Li ?…”

Section: Resultsmentioning

confidence: 99%

CuS/MoS2 nanocomposite with high solar photocatalytic activity

et al. 2015

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Two-dimensional CuS/MoS 2 heterostructure with high photocatalytic activity had been successfully obtained by a simple combination of wet chemical method and hydrothermal process. CuS nanosheets had been successfully grown on the twodimensional MoS 2 nanosheets uniformly and tightly. The obtained heterostructures were well characterized through X-ray diffraction patterns, transmission electron microscopy, Fourier transform infrared spectra, ultraviolet-visible diffuse-reflectance spectra, and Zeta potential measurement. Photocatalytic performance of the CuS/MoS 2 nanocomposite was evaluated toward the decomposition of methylene blue solution under natural light. The as-prepared nanocomposite showed remarkably enhanced photocatalytic activity compared with pure CuS and MoS 2 . This could be attributed to the enhanced dyestuff absorption and charge transport after the conjugation between CuS and MoS 2 .

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In situ synthesis of a MoS₂/CoOOH hybrid by a facile wet chemical method and the catalytic oxidation of CO in epoxy resin during decomposition

Cited by 134 publications

References 46 publications

Enhanced Thermo‐Mechanical Stiffness, Thermal Stability, and Fire Retardant Performance of Surface‐Modified 2D MoS₂Nanosheet‐Reinforced Polyurethane Composites

Enhanced Thermo‐Mechanical Stiffness, Thermal Stability, and Fire Retardant Performance of Surface‐Modified 2D MoS₂Nanosheet‐Reinforced Polyurethane Composites

Dual II Heterojunctions Metallic Phase MoS₂/ZnS/ZnO Ternary Composite with Superior Photocatalytic Performance for Removing Contaminants

CuS/MoS2 nanocomposite with high solar photocatalytic activity

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In situ synthesis of a MoS2/CoOOH hybrid by a facile wet chemical method and the catalytic oxidation of CO in epoxy resin during decomposition

Cited by 134 publications

References 46 publications

Enhanced Thermo‐Mechanical Stiffness, Thermal Stability, and Fire Retardant Performance of Surface‐Modified 2D MoS2Nanosheet‐Reinforced Polyurethane Composites

Enhanced Thermo‐Mechanical Stiffness, Thermal Stability, and Fire Retardant Performance of Surface‐Modified 2D MoS2Nanosheet‐Reinforced Polyurethane Composites

Dual II Heterojunctions Metallic Phase MoS2/ZnS/ZnO Ternary Composite with Superior Photocatalytic Performance for Removing Contaminants

CuS/MoS2 nanocomposite with high solar photocatalytic activity

Contact Info

Product

Resources

About

In situ synthesis of a MoS₂/CoOOH hybrid by a facile wet chemical method and the catalytic oxidation of CO in epoxy resin during decomposition

Enhanced Thermo‐Mechanical Stiffness, Thermal Stability, and Fire Retardant Performance of Surface‐Modified 2D MoS₂Nanosheet‐Reinforced Polyurethane Composites

Enhanced Thermo‐Mechanical Stiffness, Thermal Stability, and Fire Retardant Performance of Surface‐Modified 2D MoS₂Nanosheet‐Reinforced Polyurethane Composites

Dual II Heterojunctions Metallic Phase MoS₂/ZnS/ZnO Ternary Composite with Superior Photocatalytic Performance for Removing Contaminants