Improvement of photocatalytic activity of high specific surface area graphitic carbon nitride by loading a co-catalyst

Chen, Ye; Murakami, Naoya; Chen, Haiyan; Sun, Jia; Zhang, Qitao; Wang, Zhifeng; Ohno, Teruhisa; Zhang, Ming

doi:10.1007/s12598-014-0327-y

Cited by 29 publications

(5 citation statements)

References 35 publications

(38 reference statements)

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“…[3] However, it shows moderate photocatalytic activity due to limited light absorption, low surface area, and rapid recombination of photoexcitons. [4] Therefore, many modification strategies have been employed to improve its photocatalytic performance, such as nanostructure engineering, [5] doping, [6] co-catalyst loading, [7] and heterostructure construction. [8] Formation of heterostructure is regarded as a promising approach to facilitate the separation of photoexcitons, inhibit charge-carrier recombination, and extend the optical absorption.…”

Section: Introductionmentioning

confidence: 99%

“…However, it shows moderate photocatalytic activity due to limited light absorption, low surface area, and rapid recombination of photoexcitons [4] . Therefore, many modification strategies have been employed to improve its photocatalytic performance, such as nanostructure engineering, [5] doping, [6] co‐catalyst loading, [7] and heterostructure construction [8] …”

Section: Introductionmentioning

confidence: 99%

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Exciton Dissociation on Double Z‐scheme Heterojunction for Photocatalytic Application

et al. 2021

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Constructing heterojunction is one of the promising approaches to obtain desired photocatalysts with enhanced photocatalytic activity. Herein, we have fabricated a Fe 2 O 3 -PrFeO 3 /g-C 3 N 4 ternary heterostructure by a simple wet chemical method to improve the photocatalytic activity of pristine g-C 3 N 4 . The as-prepared catalyst has shown 7.8 times higher photocatalytic degradation of dye acid violet 7 and generated 379.29 μmolL À 1 h À 1 of ammonia under visible-light irradiation.The ternary heterojunction was found to form a double Zscheme heterojunction that facilitates interfacial electron transfer, promotes the separation of photogenerated charge carriers, and also enhances light harvesting property. The enhanced photocatalytic performance of the catalyst is ascribed to the formation of double Z-scheme heterojunction, which offers low charge transfer resistance thereby lowering the recombination of photoexcitons and increasing the lifetime of photoexcitons.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exciton Dissociation on Double Z‐scheme Heterojunction for Photocatalytic Application

et al. 2021

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“…[ 18 ] However, a TiO 2 photocatalyst, [ 19,20 ] which can only absorb UV light (approximately 5% of the total solar radiation), experiences difficulty in utilizing most of the energy in sunlight. [ 21,22 ] To address this problem, various photocatalysts with narrow bandgaps, for example, CdS, [ 23–25 ] g‐C 3 N 4 , [ 26–31 ] BiVO 4 , [ 32–35 ] and ZnIn 2 S 4 , [ 36,37 ] have been gradually developed and utilized. Taking advantage of their strong response to visible light (approximately 40% of the total solar radiation) and appropriate redox potential, these photocatalysts have been widely applied to a variety of photocatalytic systems.…”

Section: Introductionmentioning

confidence: 99%

Design, Fabrication, and Mechanism of Nitrogen‐Doped Graphene‐Based Photocatalyst

et al. 2021

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Solving energy and environmental problems through solar‐driven photocatalysis is an attractive and challenging topic. Hence, various types of photocatalysts have been developed successively to address the demands of photocatalysis. Graphene‐based materials have elicited considerable attention since the discovery of graphene. As a derivative of graphene, nitrogen‐doped graphene (NG) particularly stands out. Nitrogen atoms can break the undifferentiated structure of graphene and open the bandgap while endowing graphene with an uneven electron density distribution. Therefore, NG retains nearly all the advantages of original graphene and is equipped with several novel properties, ensuring infinite possibilities for NG‐based photocatalysis. This review introduces the atomic and band structures of NG, summarizes in situ and ex situ synthesis methods, highlights the mechanism and advantages of NG in photocatalysis, and outlines its applications in different photocatalysis directions (primarily hydrogen production, CO2 reduction, pollutant degradation, and as photoactive ingredient). Lastly, the central challenges and possible improvements of NG‐based photocatalysis in the future are presented. This study is expected to learn from the past and achieve progress toward the future for NG‐based photocatalysis.

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“…Among the g-C 3 N 4 -based heteronanostructured photocatalysts, RuO 2 nanoparticle (NP)-loaded g-C 3 N 4 (RuO 2 /g-C 3 N 4 ) has recently drawn much interest. For example, Zhang and co-workers have reported that the photocatalytic activity of g-C 3 N 4 with a large specific surface area of 45 m 2 g –1 for acetaldehyde decomposition is significantly improved by loading RuO 2 NPs by the conventional impregnation (Im) method . Chen and Shimoyama and co-workers have recently reported that RuO 2 NP ( d RuO2 = 3.5 nm)-embedded g-C 3 N 4 prepared by an Im method exhibits high photocatalytic activity for H 2 evolution from an aqueous solution of alkanolamines.…”

Section: Introductionmentioning

confidence: 99%

“…For example, Zhang and co-workers have reported that the photocatalytic activity of g-C 3 N 4 with a large specific surface area of 45 m 2 g −1 for acetaldehyde decomposition is significantly improved by loading RuO 2 NPs by the conventional impregnation (Im) method. 8 Chen and Shimoyama and co-workers have recently reported that RuO 2 NP (d RuO2 = 3.5 nm)-embedded g-C 3 N 4 prepared by an Im method exhibits high photocatalytic activity for H 2 evolution from an aqueous solution of alkanolamines. The authors attributed the photocatalytic activity to the catalytic action of the RuO 2 NPs as alkanolamine oxidation rather than H 2 evolution.…”

Section: ■ Introductionmentioning

confidence: 99%

Interfacial Interaction between the Ruthenium(IV) Oxide Cluster and Graphitic Carbon Nitride Governing the Photocatalytic Activity

Ohira,

Naya,

Fujishima

et al. 2023

J. Phys. Chem. C

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Graphitic carbon nitride (g-C3N4) has attracted much interest as a metal-free photocatalyst material responsive to visible light. g-C3N4 possesses a rhombus 2D-unit cell with ∼1.4 nm on one side. This study has shown that RuO2 clusters with a mean size (d RuO2) of ∼1.5 nm can be formed on g-C3N4 in a highly dispersed state by a solvothermal method at 453 K (RuO2 CL/g-C3N4), while the conventional impregnation method yields significantly larger RuO2 particles (d RuO2 = 6.5 nm) in an aggregated state (RuO2 NP/g-C3N4). As a test photocatalytic reaction, the conversion from acetic acid to methane, the so-called “photo-Kolbe reaction”, was carried out. Illumination of simulated sunlight (AM 1.5, 1 sun) of g-C3N4 in an acetic acid aqueous solution yields methane and carbon dioxide as the major products, and the photocatalytic activity is drastically enhanced by loading RuO2 particles on g-C3N4. RuO2 CL/g-C3N4 exhibits higher activity than RuO2 NP/g-C3N4 by approximately 2 orders of magnitude. Molecular dynamics simulations for a model of RuO2 CL/g-C3N4 show that RuO2 CL is strongly adsorbed on the g-C3N4 surface through the Ru–C and Ru–N bonds without changing the adsorbed position even at 800 K. The origin of the striking photocatalytic activity of RuO2 CL/g-C3N4 is discussed in terms of the interaction between RuO2 and g-C3N4.

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Improvement of photocatalytic activity of high specific surface area graphitic carbon nitride by loading a co-catalyst

Cited by 29 publications

References 35 publications

Exciton Dissociation on Double Z‐scheme Heterojunction for Photocatalytic Application

Exciton Dissociation on Double Z‐scheme Heterojunction for Photocatalytic Application

Design, Fabrication, and Mechanism of Nitrogen‐Doped Graphene‐Based Photocatalyst

Interfacial Interaction between the Ruthenium(IV) Oxide Cluster and Graphitic Carbon Nitride Governing the Photocatalytic Activity

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