Effect of processing temperature on structure and photocatalytic properties of g-C3N4

Papailias, Ilias; Giannakopoulou, T.; Todorova, N.; Demotikali, D.; Vaimakis, T.; Trapalis, C.

doi:10.1016/j.apsusc.2015.08.097

Cited by 299 publications

(142 citation statements)

References 63 publications

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“…The main bands at 1470 and 3300–3600 cm −1 correspond to the melamine NH and the OH groups. Therefore, the FTIR results support that M‐MoS 2 surfaces were modified with melamine . The FTIR spectra of PU and various PU/M‐MoS 2 composites are shown in Figure a.…”

Section: Resultssupporting

confidence: 58%

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: 58%

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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“…The precise assignment of Raman spectral band of graphitic carbon nitride has not been published yet. Some fragments of assignment can be found in Zinin et al [40] or Papailias et al [39].…”

Section: Photocatalysts Characterizationmentioning

confidence: 95%

Photocatalytic decomposition of N2O over TiO2/g-C3N4 photocatalysts heterojunction

Kočí

Reli

Troppová

et al. 2017

Applied Surface Science

107

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“…2.7 eV) and good thermal and chemical stabilities (up to 500 °C; at a pH from acidic to alkaline)11. The g-C 3 N 4 can be synthesized via a single-step polycondensation method with different N-rich precursors including urea, thiourea, melamine, and dicyandiamide, which are readily available at low cost1213141516. Moreover, its unique electronic and optical properties are useful for photocatalytic H 2 evolution and water purification171819.…”

mentioning

confidence: 99%

Room-temperature synthesis of nanoporous 1D microrods of graphitic carbon nitride (g-C3N4) with highly enhanced photocatalytic activity and stability

Pawar

Kang

Park

et al. 2016

Sci Rep

195

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A one-dimensional (1D) nanostructure having a porous network is an exceptional photocatalytic material to generate hydrogen (H2) and decontaminate wastewater using solar energy. In this report, we synthesized nanoporous 1D microrods of graphitic carbon nitride (g-C3N4) via a facile and template-free chemical approach at room temperature. The use of concentrated acids induced etching and lift-off because of strong oxidation and protonation. Compared with the bulk g-C3N4, the porous 1D microrod structure showed five times higher photocatalytic degradation performance toward methylene blue dye (MB) under visible light irradiation. The photocatalytic H2 evolution of the 1D nanostructure (34 μmol g−1) was almost 26 times higher than that of the bulk g-C3N4 structure (1.26 μmol g−1). Additionally, the photocurrent stability of this nanoporous 1D morphology over 24 h indicated remarkable photocorrosion resistance. The improved photocatalytic activities were attributed to prolonged carrier lifetime because of its quantum confinement effect, effective separation and transport of charge carriers, and increased number of active sites from interconnected nanopores throughout the microrods. The present 1D nanostructure would be highly suited for photocatalytic water purification as well as water splitting devices. Finally, this facile and room temperature strategy to fabricate the nanostructures is very cost-effective.

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Effect of processing temperature on structure and photocatalytic properties of g-C3N4

Cited by 299 publications

References 63 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

Photocatalytic decomposition of N2O over TiO2/g-C3N4 photocatalysts heterojunction

Room-temperature synthesis of nanoporous 1D microrods of graphitic carbon nitride (g-C3N4) with highly enhanced photocatalytic activity and stability

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Effect of processing temperature on structure and photocatalytic properties of g-C3N4

Cited by 299 publications

References 63 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

Photocatalytic decomposition of N2O over TiO2/g-C3N4 photocatalysts heterojunction

Room-temperature synthesis of nanoporous 1D microrods of graphitic carbon nitride (g-C3N4) with highly enhanced photocatalytic activity and stability

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Product

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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