Heterojunction of facet coupled g-C3N4/surface-fluorinated TiO2 nanosheets for organic pollutants degradation under visible LED light irradiation

Dai, Kai; Lu, Luhua; Liang, Changhao; Liu, Qi; Zhu, Guangping

doi:10.1016/j.apcatb.2014.03.039

Cited by 321 publications

(98 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, many efforts have been devoted to modify synthetic procedures toward g-C 3 N 4 to gain an efficient photocatalytic system, such as doping with metal oxides or nonmetal elements [9][10][11][12][13], construction of porous or hierarchical nanostructures [14][15][16], and combining other semiconductors with suitable band structures [17][18][19][20][21][22]. Among strategies mentioned above, the fabrication of porous g-C 3 N 4 from the precursor of prononated melamine is quite promising and possible to achieve satisfactory catalytic efficiency.…”

Section: Introductionmentioning

confidence: 99%

Enhanced visible-light-driven photocatalytic performance of porous graphitic carbon nitride

Chang

Luo

et al. 2015

Applied Surface Science

View full text Add to dashboard Cite

a b s t r a c tIn this study, a series of porous graphitic carbon nitride (g-C 3 N 4 ) materials were fabricated through a direct pyrolysis of protonated melamine by nitric acid solution. These as-prepared porous samples were characterized by a collection of analytical techniques. It was found that a proper concentration of nitric acid solution involved facilitated to generate samples in tube-like morphology with numerous pores, identified with X-ray diffraction patterns, FT-IR spectra, SEM, TEM, and BET measurements. These g-C 3 N 4 samples were subjected to photocatalytic degradation of dye Rhodamine B (RhB) in aqueous under visible-light irradiation. Under identical conditions, those porous g-C 3 N 4 samples showed significantly improved catalytic performance in comparison with the sample prepared without the introduction of nitric acid. In particularly, the best candidate, sample M1:1, showed an apparent reaction rate nearly 6.2 times that of the unmodified counterpart. The enhancement of photocatalytic performance could be attributed to the favorable porous structure with the enlarged specific surface area and the suitable electronic structure as well. In addition, ESR measurements were conducted for the sake of proposing a photocatalytic degradation mechanism.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhanced visible-light-driven photocatalytic performance of porous graphitic carbon nitride

Chang

Luo

et al. 2015

Applied Surface Science

View full text Add to dashboard Cite

show abstract

“…10,11 Nevertheless, it has been concluded that the low photocatalytic activities of g-C 3 N 4 are mainly attributed to high recombination of photo-generated charge carriers and low specic surface area. [12][13][14] Many efforts have been made to overcome these bottlenecks. It was reported that ultrasonic vibration, 15 thermal exfoliation 16 and hydrothermal treatment 17 could be used to change the BET surface area.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of g-C₃N₄ nanosheets loaded with WO₃ nanoparticles with enhanced photocatalytic performance under visible light irradiation

et al. 2017

View full text Add to dashboard Cite

Graphitic carbon nitride (g-C 3 N 4 ) nanosheets loaded with WO 3 nanoparticles were prepared via heat treatment of g-C 3 N 4 together with WO x -EDA nanobelts. The thermal treatment temperature and WO x -EDA precursor play the key role in enhancing the interaction between WO 3 nanoparticles and g-C 3 N 4 nanosheets, because the temperature of thermal decomposition of WO x -EDA ($400 C) is close to the thermal exfoliation temperature of g-C 3 N 4 . The structure evolution and promotion effect of the nanocomposites in photocatalytic performance were well studied. It is found that WO 3 nanoparticles uniformly dispersed on the surface of the g-C 3 N 4 nanosheets, and the close integration of WO 3 and g-C 3 N 4 lead to the high photocatalytic activity in the degradation of RhB under visible light irradiation.Meanwhile, a larger specific area and increase of visible light absorption are also of benefit to speed up the degradation of organic dye. Also, the mechanism of the photocatalytic reaction and its reutilization properties were investigated.

show abstract

“…In an another approach to enhance the efficiency of charge separation in TiO 2 , a heterojunction structure consisting of two different semiconductors has been demonstrated [12]. Once the heterojunction has formed between TiO 2 and the coupled semiconductor material of a suitable band gap, the photoexcited electron of the lower conduction band (CB) potential of TiO 2 will be promoted to the CB potential of the coupled semiconductor material, and similarly, the photoexcited hole of the higher valence band (VB) potential of TiO 2 will be transferred to the VB of the coupled semiconductor material [13].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of a Z-Scheme g-C3N4/Fe-TiO2 Photocatalytic Composite with Enhanced Photocatalytic Activity under Visible Light Irradiation

Zhu

Murugananthan

et al. 2018

Catalysts

View full text Add to dashboard Cite

Abstract:In the present study, a nanocomposite material g-C 3 N 4 /Fe-TiO 2 has been prepared successfully by a simple one-step hydrothermal process and its structural properties were thoroughly studied by various characterization techniques, such as X-ray diffraction (XRD), Fourier Transform Infrared (FTIR) spectroscopy, electron paramagnetic resonance (EPR) spectrum, X-ray photoelectron spectroscopy (XPS), and UV-vis diffuse reflectance spectrometry (UV-vis DRS). The performance of the fabricated composite material towards the removal of phenol from aqueous phase was systematically evaluated by a photocatalytic approach and found to be highly dependent on the content of Fe 3+ . The optimum concentration of Fe 3+ doping that showed a dramatic enhancement in the photocatalytic activity of the composite under visible light irradiation was observed to be 0.05% by weight. The separation mechanism of photogenerated electrons and holes of the g-C 3 N 4 /Fe-TiO 2 photocatalysts was established by a photoluminescence technique in which the reactive species generated during the photocatalytic treatment process was quantified. The enhanced photocatalytic performance observed for g-C 3 N 4 -Fe/TiO 2 was ascribed to a cumulative impact of both g-C 3 N 4 and Fe that extended its spectrum-absorptive nature into the visible region. The heterojunction formation in the fabricated photocatalysts not only facilitated the separation of the photogenerated charge carriers but also retained its strong oxidation and reduction ability.

show abstract

Heterojunction of facet coupled g-C3N4/surface-fluorinated TiO2 nanosheets for organic pollutants degradation under visible LED light irradiation

Cited by 321 publications

References 61 publications

Enhanced visible-light-driven photocatalytic performance of porous graphitic carbon nitride

Enhanced visible-light-driven photocatalytic performance of porous graphitic carbon nitride

Facile synthesis of g-C₃N₄ nanosheets loaded with WO₃ nanoparticles with enhanced photocatalytic performance under visible light irradiation

Fabrication of a Z-Scheme g-C3N4/Fe-TiO2 Photocatalytic Composite with Enhanced Photocatalytic Activity under Visible Light Irradiation

Contact Info

Product

Resources

About

Heterojunction of facet coupled g-C3N4/surface-fluorinated TiO2 nanosheets for organic pollutants degradation under visible LED light irradiation

Cited by 321 publications

References 61 publications

Enhanced visible-light-driven photocatalytic performance of porous graphitic carbon nitride

Enhanced visible-light-driven photocatalytic performance of porous graphitic carbon nitride

Facile synthesis of g-C3N4 nanosheets loaded with WO3 nanoparticles with enhanced photocatalytic performance under visible light irradiation

Fabrication of a Z-Scheme g-C3N4/Fe-TiO2 Photocatalytic Composite with Enhanced Photocatalytic Activity under Visible Light Irradiation

Contact Info

Product

Resources

About

Facile synthesis of g-C₃N₄ nanosheets loaded with WO₃ nanoparticles with enhanced photocatalytic performance under visible light irradiation