Porous graphitic carbon nitride nanosheets prepared under self-producing atmosphere for highly improved photocatalytic activity

Song, Xueping; Yang, Qin; Jiang, Xiaohui; Yin, Mengyun; Zhou, Limei

doi:10.1016/j.apcatb.2017.05.084

Cited by 108 publications

(65 citation statements)

References 45 publications

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“…The intensity of PL emission can reflect the amount of electrons recombine with holes under emission of photons. As illustrated in Figure 6C and S15A, the PL spectrum of pure g‐C 3 N 4 sample shows the peak centered at 480 nm, which should be assigned to the band‐edge emission of g‐C 3 N 4 [35] and consistent with the edge absorption of UV‐vis spectra in Figure S15B. Compared with pure g‐C 3 N 4 , the PL spectrum for ReS 2 /g‐C 3 N 4 composite shows two properties.…”

Section: Resultssupporting

confidence: 63%

Modification of g‐C₃N₄ Photocatalyst with Flower‐like ReS₂ for Highly Efficient Photocatalytic Hydrogen Evolution

Xing

Zhao

et al. 2020

ChemCatChem

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Heterojunction strategy has proven to be an effective approach for overcoming the quick photoexcited charge carrier recombination of graphitic carbon nitride (g‐C3N4) and facilitating its photocatalytic performances. Bearing the merits of transition metal dichalcogenides (TMDs) in mind, in this work, a novel flower‐like ReS2 coupled with layered g‐C3N4 was constructed via a facile hydrothermal route. The hybrid ReS2/g‐C3N4 catalysts create excellent photocatalytic hydrogen evolution without any additional co‐catalyst. Under visible‐light irradiation, the optimized 3 wt % ReS2/g‐C3N4 heterojunction exhibited a hydrogen evolution rate 8 times that of pristine g‐C3N4, maintaining a stable heterojunction after multiple photocatalytic cycles. ReS2/g‐C3N4 integrates the merits of both the configuration of a heterojunction and the formation of spatially conductive network, which effectively accelerate the transfer of photoinduced carrier. This work not only presents a marked ReS2/g‐C3N4 heterojunction photocatalyst, but provides more possibility for expanding applications in electrocatalysis, photothermal catalysis and energy storage.

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Section: Resultssupporting

confidence: 63%

Modification of g‐C₃N₄ Photocatalyst with Flower‐like ReS₂ for Highly Efficient Photocatalytic Hydrogen Evolution

Xing

Zhao

et al. 2020

ChemCatChem

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“…Furthermore, all absorption bands in the spectrum of P‐CNO are much sharper than those in the spectrum of CN. Corresponding to the XRD analysis, this again verifies that the tri‐ s ‐triazine units with a more‐ordered in‐plane structural packing motif exist in the P‐CNO sample . Room‐temperature electron paramagnetic resonance (EPR) was further performed to prove the lower density of defects in P‐CNO.…”

Section: Resultsmentioning

confidence: 59%

“…Corresponding to the XRD analysis, this again verifiest hat the tri-s-triazine units with am ore-ordered in-plane structuralp acking motif exist in the P-CNO sample. [46] Room-temperature electron paramagnetic resonance (EPR) was further performed to prove the lower density of defects in P-CNO. Owing to the factt hat the orientation of the electron spins of the charge carrieri sn ot conserved for al ong time at room temperature, [19] the EPR signal intensity for both CN and P-CNO is rather weak.…”

Section: Resultsmentioning

confidence: 99%

Hydrothermally Induced Oxygen Doping of Graphitic Carbon Nitride with a Highly Ordered Architecture and Enhanced Photocatalytic Activity

et al. 2018

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As an amorphous or semicrystalline material, graphitic carbon nitride (g-C N ) displays poor photocatalytic activity owing to rapid recombination of the photogenerated charge carriers, which is mainly caused by a high density of defects in the graphitic structure. In this work, a porous O-doped g-C N (P-CNO) nanosheet with a highly ordered architecture is fabricated by introducing a novel hydrothermal treatment to the precursor before the final thermal condensation. The photocatalytic hydrogen evolution rate (HER) and HER per surface area of P-CNO are 13.9 and 1.7 times higher than that of bulk g-C N . The improved photocatalytic activity is ascribed to a synergistic effect of O doping, a porous sheet-like morphology, and increased crystallinity. This work also provides a new approach for the synthesis of other polymer-based photocatalysts with high crystallinity and excellent performance.

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“…It is worth noting that the (002) peak of HCCN is shifted to 27.7°, implying the decrease in interlayer distance within the graphitic like planar. 23,24 Moreover, the narrower peak represents the increased degree of condensation and crystallization, 25 which demonstrates the formation of HCCN. For the pure TiO 2 [blue line of Fig.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of TiO₂/high‐crystalline g‐C₃N₄ composite with enhanced visible‐light photocatalytic performance for tetracycline degradation

Guo

Sun

Huang

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND The construction of heterojunction between two‐phase semiconductors is a crucial tactic to enhance photocatalytic activity due to its efficient charge separation. RESULT In this work, a novel TiO2/high‐crystalline g‐C3N4 (HCCN) heterojunction photocatalyst was synthesized successfully via a simply hydrothermal method, which was composed of TiO2 nanoparticles distributed on the surface of the HCCN nanosheets. The microstructure and morphology of TiO2/HCCN heterojunction were investigated by various characteristic techniques (such as X‐ray diffraction, transmission electron microscopy and Fourier transform infrared). The photocatalytic performance of as‐prepared photocatalysts was tested though the degradation of tetracycline (10 mg L−1) under visible light irradiation (λ > 420 nm). Significantly, the 50% TiO2/HCCN composite photocatalyst (mass fraction of TiO2 is 50%) exhibited the optimum photocatalytic activity (90%, 120 min), and the corresponding reaction rate constant was around 12 times and 54 times higher than those of pristine HCCN and TiO2, respectively. CONCLUSION The excellent photocatalytic performance was attributed mainly to the synergistic effect of the TiO2/HCCN heterojunction as follows: (i) enhanced light absorption capacity; (ii) improved separation and migration of electron–hole pairs; (iii) extended lifetime of photogenerated carriers. This current study extends our knowledge towards constructing other HCCN‐based nanocomposites with extraordinary photocatalytic performance for addressing environmental problems. © 2020 Society of Chemical Industry

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Porous graphitic carbon nitride nanosheets prepared under self-producing atmosphere for highly improved photocatalytic activity

Cited by 108 publications

References 45 publications

Modification of g‐C₃N₄ Photocatalyst with Flower‐like ReS₂ for Highly Efficient Photocatalytic Hydrogen Evolution

Modification of g‐C₃N₄ Photocatalyst with Flower‐like ReS₂ for Highly Efficient Photocatalytic Hydrogen Evolution

Hydrothermally Induced Oxygen Doping of Graphitic Carbon Nitride with a Highly Ordered Architecture and Enhanced Photocatalytic Activity

Fabrication of TiO₂/high‐crystalline g‐C₃N₄ composite with enhanced visible‐light photocatalytic performance for tetracycline degradation

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Porous graphitic carbon nitride nanosheets prepared under self-producing atmosphere for highly improved photocatalytic activity

Cited by 108 publications

References 45 publications

Modification of g‐C3N4 Photocatalyst with Flower‐like ReS2 for Highly Efficient Photocatalytic Hydrogen Evolution

Modification of g‐C3N4 Photocatalyst with Flower‐like ReS2 for Highly Efficient Photocatalytic Hydrogen Evolution

Hydrothermally Induced Oxygen Doping of Graphitic Carbon Nitride with a Highly Ordered Architecture and Enhanced Photocatalytic Activity

Fabrication of TiO2/high‐crystalline g‐C3N4 composite with enhanced visible‐light photocatalytic performance for tetracycline degradation

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Modification of g‐C₃N₄ Photocatalyst with Flower‐like ReS₂ for Highly Efficient Photocatalytic Hydrogen Evolution

Modification of g‐C₃N₄ Photocatalyst with Flower‐like ReS₂ for Highly Efficient Photocatalytic Hydrogen Evolution

Fabrication of TiO₂/high‐crystalline g‐C₃N₄ composite with enhanced visible‐light photocatalytic performance for tetracycline degradation