Chemical exfoliation of graphitic carbon nitride for efficient heterogeneous photocatalysis

Xu, Jing; Zhang, Liwu; Shi, Rui; Zhu, Yongfa

doi:10.1039/c3ta13188b

Cited by 1,153 publications

(704 citation statements)

References 42 publications

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“…However, the excess amount of Ag nanoparticles may inversely reduce the surface area by means of blocking stacking pores. As can be seen, the composite AB4 has the largest specific surface area among all samples, which is beneficial to adsorb organic contaminants around active sites and thus maximize the photocatalytic performance [30].…”

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

confidence: 98%

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

confidence: 98%

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

Chang

Wang

Luo

et al. 2017

Molecular Catalysis

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“…Deionized water was used throughout the study. Ultrathin g-C 3 N 4 nanosheets were prepared by a one-step polymerization method, which was similar to the previous report [22]. In detail, 20 g urea powder was put into an alumina crucible with a cover in air.…”

Section: Methodsmentioning

confidence: 99%

Ultrathin g-C3N4 Nanosheet-Modified BiOCl Hierarchical Flower-Like Plate Heterostructure with Enhanced Photostability and Photocatalytic Performance

Jia

Long

et al. 2017

Crystals

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Abstract:A novel ultrathin g-C 3 N 4 nanosheet-modified BiOCl hierarchical flower-like plate heterostructure (abbreviated as BC/CN) was constructed via a thermal polymerization of urea precursor followed with hydrolysis route. The as-prepared samples were well characterized by various analytical techniques. The morphological observation showed that hierarchical flower-like BiOCl nanoplates were discretely anchored on the surface of ultra-thin C 3 N 4 nanosheets. The photocatalytic performance of the as-prepared photocatalysts was evaluated by degradation of methylene blue (MB) under visible-light irradiation. The results showed that BC/CN photocatalyst exhibited enhanced photostability and photocatalytic performance in the degradation process. On the basis of experimental results and the analysis of band energy structure, it could be inferred that the enhanced photocatalytic performance of BC/CN photocatalyst was intimately related with the hybridization of hierarchical flower-like BiOCl nanoplates with ultrathin g-C 3 N 4 nanosheets, which provided good adsorptive capacity, extended light absorption, suppressed the recombination of photo-generated electron-hole pairs, and facilitated charge transfer efficiently.

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“…Recently, A metal-free organic semiconductor photocatalysts, graphite-like carbon nitride (g-C 3 N 4 ) with small bandgap of 2.7 eV, has been found to be a promising candidate for photocatalytic applications because of its narrow bandgap, non-toxicity, low cost and excellent chemical stability 20,21 . Particularly, it can be easily obtained by the heat treatment of nitrogen-rich precursors at relatively low temperature 20,21 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Degradation Activity of BiFeO3 Microspheres by Decoration with g-C3N4 Nanoparticles

Yang

Tang

et al. 2018

Mat. Res.

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In this work, the g-C 3 N 4 nanoparticles decorated BiFeO 3 microspheres composites (g-C 3 N 4 / BiFeO 3 ) were successfully synthesized by hydrothermal treatment of g-C 3 N 4 nanoparticles together with BiFeO 3 microspheres. The SEM and HRTEM observation indicate that the C 3 N 4 nanoparticles with size of 30-50 nm are well decorated on the surface of BiFeO 3 microspheres. The photocatalytic activities of the samples are investigated by the degradation of methylene blue (MB) under the irradiation of simulated sunlight. The as-prepared g-C 3 N 4 /BiFeO 3 composites exhibit remarkable enhanced photocatalytic activity compared with bare BiFeO 3 . More importantly, the photocataltic performance of the composites is further confirmed by the degradation of colorless phenol. Furthermore, the favorable catalytic stability of composites is demonstrated through the recycling photocatalytic experiment. The enhanced photocatalytic activity of g-C 3 N 4 /BiFeO 3 composites is mainly attributed to the separation of the photogenerated electron-hole pairs, resulting from the migration of the photoinduced charge between g-C 3 N 4 nanoparticles and BiFeO 3 . A possible photocatalytic mechanism for dye degradation over g-C 3 N 4 /BiFeO 3 composite is proposed based on the active species trapping experiment, revealing that the photogenerated hole (h + ) and hydrogen peroxide (H 2 O 2 ) are regarded as the major active species for the decomposition of dye, while hydroxyl radicals (•OH) plays a minor role in the photocatalytic reaction.

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Chemical exfoliation of graphitic carbon nitride for efficient heterogeneous photocatalysis

Cited by 1,153 publications

References 42 publications

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

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

Ultrathin g-C3N4 Nanosheet-Modified BiOCl Hierarchical Flower-Like Plate Heterostructure with Enhanced Photostability and Photocatalytic Performance

Enhanced Photocatalytic Degradation Activity of BiFeO3 Microspheres by Decoration with g-C3N4 Nanoparticles

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