Enhanced visible light photocatalytic activity of novel polymeric g-C3N4 loaded with Ag nanoparticles

Ge, Lei; Han, Changcun; Liu, Jing; Li, Yunfeng

doi:10.1016/j.apcata.2011.10.006

Cited by 610 publications

(268 citation statements)

References 40 publications

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“…However, the photocatalytic efficiency of single g-C 3 N 4 is limited due to the high recombination probability of photogenerated electron-hole pairs [5,6]. In order to improve photocatalytic activity, several efforts have been developed to improve the photocatalytic performance of g-C 3 N 4 in terms of introducing heteroatoms [7][8][9][10], sensitized by dyes [11], coupled with semiconductors or polymers [12][13][14][15][16], and controlling morphology [17][18][19]. Nevertheless, a simple development of highly efficient g-C 3 N 4 remains a significant challenge.…”

Section: Introductionmentioning

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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Section: Introductionmentioning

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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“…However, its poor light absorption performance and easy recombination of electron-hole pairs limited the photocatalytic efficiency of g-C 3 N 4 . Recently, several methods have been made to improve the photocatalytic activity of g-C 3 N 4 by employing different modifications, such as nonmetal element doping [22], noble metal deposition [23], coupling with semiconductors composite [24], and controlling morphology [25,26].…”

Section: Introductionmentioning

confidence: 99%

Enhanced visible-light photocatalytic activity and stability over g-C3N4/Ag2CO3 composites

et al. 2014

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A facile direct growth method was developed for the fabrication of Ag 2 CO 3 nanoparticles on the surface of g-C 3 N 4 at room temperature. The as-prepared g-C 3 N 4 / Ag 2 CO 3 composites were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy with energy dispersion X-ray spectroscopy, UV-vis diffuse reflectance spectroscopy, and photoluminescence spectroscopy. The photocatalytic activities were evaluated by degrading Rhodamine B dye. The results indicated that Ag 2 CO 3 nanoparticles with the size of 5-10 nm were finely distributed on the surface of g-C 3 N 4 sheet, leading to the enhancement of the photocatalytic activity. And when the mass ratio of g-C 3 N 4 to Ag 2 CO 3 was 1:4, the as-prepared composites exhibited the optimum photocatalytic activity, which was approximately 8 and 3 times higher than pure g-C 3 N 4 and Ag 2 CO 3 , respectively. The enhanced photocatalytic performance could be attributed to the synergetic effects between g-C 3 N 4 and Ag 2 CO 3 , including the smaller particle size of Ag 2 CO 3 and high charge separation efficiency of the photogenerated electron-hole pair. More attractively, the stability of Ag 2 CO 3 was improved due to its highly dispersion on g-C 3 N 4 sheet. In addition, based on the experimental results, the Z-scheme mechanism for the photodegradation over g-C 3 N 4 /Ag 2 CO 3 composites was proposed.

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“…Foremost, the integration of metallic Ag species strengthens the visible-light scattering and harvesting ability in visible-light region, favoring the generation of more electron-hole pairs for oxidative degradations. Second, the Ag nanoparticles are able to role as electron sinks to promote the efficient separation of produced charge carriers [34,35]. A suitable amount of Ag deposits facilitates the migration and transfer of excited electrons from the conduction band of semiconductor to metallic sites through the Schottky barrier generated at the metal-semiconductor interface.…”

Section: Fig 3 Sem Images Of Composites Ab0 (A) and Ab4(b) And Thementioning

confidence: 99%

Ag/Bi12O17Cl2 composite: A case study of visible-light-driven plasmonic photocatalyst

Chang

Wang

Luo

et al. 2017

Molecular Catalysis

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a b s t r a c tIn this investigation, novel Ag/Bi 12 O 17 Cl 2 plasmonic composites with different Ag contents were constructed through a solvothermal and subsequent photoreduction route and fully characterized by a collection of analytical techniques. Spectroscopic results confirmed the presence and uniform dispersion of Ag nanoparticles on the 2D nanosheets of Bi 12 O 17 Cl 2 . The Ag content in composites exerted considerable influence on the extension of light-adsorption range and the enlargement of specific surface areas. The photocatalytic abilities of these Ag/Bi 12 O 17 Cl 2 composites were evaluated toward the degradation of rhodamine B (RhB) and 2,4-dichlorophenol (2,4-DCP) under the visible-light irradiation. The results demonstrated that the Ag/Bi 12 O 17 Cl 2 composites showed much higher photocatalytic efficiencies than that of pure Bi 12 O 17 Cl 2 , especially the sample with an optimal Ag content showing the best photocatalytic behavior among all tested samples. The remarkable enhancement of Ag/Bi 12 O 17 Cl 2 photocatalytic efficiency could be mainly attributed to the efficient charge separation that was induced by the localized surface plasmon resonance effect of metallic Ag, strong visible-light adsorption and the favorable morphology with enlarged specific surface areas. Eventually, the photocatalysis mechanism over Ag/Bi 12 O 17 Cl 2 composites was preliminarily proposed on the base of reactive species trapping experiments.

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Enhanced visible light photocatalytic activity of novel polymeric g-C3N4 loaded with Ag nanoparticles

Cited by 610 publications

References 40 publications

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

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

Enhanced visible-light photocatalytic activity and stability over g-C3N4/Ag2CO3 composites

Ag/Bi12O17Cl2 composite: A case study of visible-light-driven plasmonic photocatalyst

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