In situ synthesis of graphitic-C3N4 nanosheet hybridized N-doped TiO2 nanofibers for efficient photocatalytic H2 production and degradation

Han, Cheng; Wang, Kunjie; Lei, Yongpeng; Wang, Bing; Wu, Nan; Qiu, Shi; Li, Qiong

doi:10.1007/s12274-014-0600-2

Cited by 302 publications

(152 citation statements)

References 47 publications

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“…440 nm, which was similar to that of pure g-C 3 N 4 . The band gap energy of both samples was estimated to be 2.8 eV, which coincided well with the reported literatures [30,43,44]. Surprisingly, with the incorporation of AgX nanoparticles on pCN, the absorption edge of AgX/pCN did not vary notably.…”

Section: Materials Characterizationsupporting

confidence: 90%

“…For pCN sample, the absorption bands were almost similar to that of pure g-C 3 N 4 reported in our previous works [15,28], implying that chemical refinement from the acid pretreatment process did not markedly affect the atomic structures of pure g-C 3 N 4 . Evidently, the strong absorption peaks in the region of 1200-1650 cm −1 , centered at 1635, 1572, 1416, 1325 and 1249 cm −1 , were attributed to the typical stretching vibration of C N and C N heterocycles [30]. Additionally, the breathing mode of tri-s-triazine units was observed at 812 cm −1 .…”

Section: Materials Characterizationmentioning

confidence: 89%

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Heterostructured AgX/g-C3N4 (X = Cl and Br) nanocomposites via a sonication-assisted deposition-precipitation approach: Emerging role of halide ions in the synergistic photocatalytic reduction of carbon dioxide

Ong

Putri

Tan

et al. 2016

Applied Catalysis B: Environmental

288

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Section: Materials Characterizationsupporting

confidence: 90%

Section: Materials Characterizationmentioning

confidence: 89%

Heterostructured AgX/g-C3N4 (X = Cl and Br) nanocomposites via a sonication-assisted deposition-precipitation approach: Emerging role of halide ions in the synergistic photocatalytic reduction of carbon dioxide

Ong

Putri

Tan

et al. 2016

Applied Catalysis B: Environmental

288

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“…0.35 nm matches well with the anatase TiO 2 (101) plane. During solvothermal treatment, the nanosheet TiO 2 assembled on the surface of g-C 3 N 4 nanosheet to achieve a minimum surface energy [39]. This type of interfacial contact would facilitate the transfer of photo-generated charge carriers between g-C 3 N 4 and TiO 2 when used as a heterogeneous photocatalyst.…”

Section: Microstructure Analysismentioning

confidence: 99%

TiO2/g-C3N4 nanosheets hybrid photocatalyst with enhanced photocatalytic activity under visible light irradiation

Li²,

Zhao

et al. 2015

Res Chem Intermed

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The nanosheets TiO 2 /g-C 3 N 4 hybrid material with efficient visible-light photocatalytic activity was prepared by a facile solvothermal method. The as-prepared TiO 2 /g-C 3 N 4 nanosheets composite was thoroughly characterized by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, N 2 adsorption-desorption analysis, UV-Vis diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. As evaluated by the degradation of methylene blue under visible light irradiation, TiO 2 /g-C 3 N 4 hybrid composites exhibit much higher photocatalytic activity than pristine g-C 3 N 4 and TiO 2 , respectively. The significant enhancement in photodegradation activity over the TiO 2 /g-C 3 N 4 photocatalyst can be ascribed to the combined effects of the nanosheet structure and subsequent efficient separation of photogenerated charge carriers. A tentative mechanism for the photodegradation process was proposed.

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“…Graphitic carbon nitride (GCN) is one of the most attractive materials, with excellent electrochemical properties [18,[24][25][26][27][28][29][30][31][32]. Furthermore, GCN can act as an electocatalyst in both OER and HER, but poor conductivity and a lack of redox site availability hamper the application of GCN-based materials.…”

Section: Introductionmentioning

confidence: 99%

Bifunctional catalysts of Co3O4@GCN tubular nanostructured (TNS) hybrids for oxygen and hydrogen evolution reactions

Tahir

Mahmood

Zhang³

et al. 2015

Nano Res.

133

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Catalysts for oxygen and hydrogen evolution reactions (OER/HER) are at the heart of renewable green energy sources such as water splitting. Although incredible efforts have been made to develop efficient catalysts for OER and HER, great challenges still remain in the development of bifunctional catalysts. Here, we report a novel hybrid of Co 3 O 4 embedded in tubular nanostructures of graphitic carbon nitride (GCN) and synthesized through a facile, large-scale chemical method at low temperature. Strong synergistic effects between Co 3 O 4 and GCN resulted in excellent performance as a bifunctional catalyst for OER and HER. The high surface area, unique tubular nanostructure, and composition of the hybrid made all redox sites easily available for catalysis and provided faster ionic and electronic conduction. The Co 3 O 4 @GCN tubular nanostructured (TNS) hybrid exhibited the lowest overpotential (0.12 V) and excellent current density (147 mA/cm 2 ) in OER, better than benchmarks IrO 2 and RuO 2 , and with superior durability in alkaline media. Furthermore, the Co 3 O 4 @GCN TNS hybrid demonstrated excellent performance in HER, with a much lower onset and overpotential, and a stable current density. It is expected that the Co 3 O 4 @GCN TNS hybrid developed in this study will be an attractive alternative to noble metals catalysts in large scale water splitting and fuel cells.

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In situ synthesis of graphitic-C3N4 nanosheet hybridized N-doped TiO2 nanofibers for efficient photocatalytic H2 production and degradation

Cited by 302 publications

References 47 publications

Heterostructured AgX/g-C3N4 (X = Cl and Br) nanocomposites via a sonication-assisted deposition-precipitation approach: Emerging role of halide ions in the synergistic photocatalytic reduction of carbon dioxide

Heterostructured AgX/g-C3N4 (X = Cl and Br) nanocomposites via a sonication-assisted deposition-precipitation approach: Emerging role of halide ions in the synergistic photocatalytic reduction of carbon dioxide

TiO2/g-C3N4 nanosheets hybrid photocatalyst with enhanced photocatalytic activity under visible light irradiation

Bifunctional catalysts of Co3O4@GCN tubular nanostructured (TNS) hybrids for oxygen and hydrogen evolution reactions

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