Co-monomer engineering optimized electron delocalization system in carbon-bridging modified g-C3N4 nanosheets with efficient visible-light photocatalytic performance

Li, Yunfeng; Wang, Shuai; Chang, Wei; Zhang, Luohong; Wu, Zhansheng; Jin, Renxi; Xing, Yan

doi:10.1016/j.apcatb.2020.119116

Cited by 101 publications

(42 citation statements)

References 79 publications

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“…The g-C3N4 nanosheets was prepared via heating melamine based on a reported previously 23 . Typically, 5 g of melamine was heated to 823 K in a cover alumina crucible for 2 h at the rate of 2 K•min −1 .…”

Section: Synthesis Of 2d G-c3n4 Photocatalytic Materialsmentioning

confidence: 99%

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A 0D/2D Bi4V2O11/g-C3N4 S-scheme Heterojunction with Rapid Interfacial Charges Migration for Photocatalytic Antibiotic Degradation

Zhou¹,

Li²,

Zhang³

et al. 2022

Acta Physico Chimica Sinica

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With the rapid development of industrial technology, a large number of organic pollutants are routinely released into the environment, which has caused serious problems. Semiconductor photocatalysis is an environmentally-friendly and effective method to degrade and remove typical pollutants, and photocatalysts play a key role in the application of this technology. Therefore, various semiconductor materials have been tried and used in the field of pollutant removal. Graphite carbon nitride (g-C3N4) has attracted great interest because of its two-dimensional layered structure and good visible light response range. Owing to a narrow bandgap, adjustable band structure, and high physicochemical stability, g-C3N4 absorbs wavelengths up to 450 nm in the visible spectrum, leading to an opportunity for visible-light photocatalytic performance. Nevertheless, there are still some drawbacks that limit the photocatalytic efficiency of g-C3N4 in the removal of antibiotics and dyes under visible light, such as the rapid recombination of photoinduced charges and the weak oxidation capacity of holes. To advance this promising photocatalytic material, multiple methods have been tried to optimize the electronic band structure of g-C3N4, such as doping with various elements, morphology control, and functional group modification. Recently, a novel type of Step-scheme (S-scheme) heterojunction composed of two n-type semiconductor photocatalysts has been proposed, which can utilize a more positive valance band and a more negative conduction band. It was demonstrated that the formation of S-scheme heterojunctions is a valid way to increase photocatalytic activity of g-C3N4. Herein, novel 0D/2D Bi4V2O11/g-C3N4 S-scheme heterojunctions were prepared by a simple in situ solvothermal growth method. The Bi4V2O11/g-C3N4 composites displayed a high photocatalytic activity through the removal of oxytetracycline (OTC) and Reactive Red 2. In particular, the BVCN-50 composite showed the highest degradation efficiency for OTC of 74.1% and for Reactive Red 2 of 84.2% with •O2 − as the primary active species.This highly improved photocatalytic performance can be ascribed to the generation of S-scheme heterojunctions, which provides for a high redox capacity of the heterojunction system (strong oxidative ability of Bi4V2O11 and strong reductive capacity of g-C3N4) and facilitates the space separation of photo-generated charges. Moreover, the surface plasmon resonance effect of metallic Bi 0 broadens the light utilization range of the heterojunction system. In addition, the possible degradation pathway and intermediates throughout the degradation process of OTC based on liquid chromatograph mass spectrometer (LC-MS) analysis were also studied. This work provides a novel tactic for the design and fabrication of g-C3N4-based S-scheme heterojunctions with enhanced photocatalytic performance.

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Section: Synthesis Of 2d G-c3n4 Photocatalytic Materialsmentioning

confidence: 99%

“…To advance this promising photocatalytic material, multiple tactics have been tried to optimize the electronic band structure of g-C3N4, such as doping with metal/non-metal elements 19,20 , morphology regulation 21,22 , and functional group modification 23,24 , etc.…”

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confidence: 99%

A 0D/2D Bi4V2O11/g-C3N4 S-scheme Heterojunction with Rapid Interfacial Charges Migration for Photocatalytic Antibiotic Degradation

Zhou¹,

Li²,

Zhang³

et al. 2022

Acta Physico Chimica Sinica

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“…[16][17][18][19] Thus, the key technology bottlenecks of photocatalytic CO 2 reduction are the poor charge separation and low efficiency of photocatalyst during the photocatalytic reaction. [20][21][22][23] Combining two semiconductors with different bandgap energy can realize the complementary advantages of the two materials, which is an effective approach to improving photocatalytic efficiency. [24][25][26][27] As a kind of semiconductor polymer photocatalyst, graphite carbon nitride (g-C 3 N 4 ) has drawn extensive attention as it has suitable bandgap energy to absorb visible light, good stability, easy preparation, low cost, and non-toxic.…”

Section: Introductionmentioning

confidence: 99%

Erbium Single Atom Composite Photocatalysts for Reduction of CO₂ under Visible Light: CO₂ Molecular Activation and 4f Levels as an Electron Transport Bridge

Han

Zhao

Gao

et al. 2021

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It is still challenging to design a stable and efficient catalyst for visible‐light CO2 reduction. Here, Er3+ single atom composite photocatalysts are successfully constructed based on both the special role of Er3+ and the special advantages of Zn2GeO4/g‐C3N4 heterojunction in the photocatalysis reduction of CO2. Especially, Zn2GeO4:Er3+/g‐C3N4 obtained by in situ synthesis is not only more conducive to the tight junction of Zn2GeO4 and g‐C3N4, but also more favorable for g‐C3N4 to anchor rare‐earth atoms. Under visible‐light irradiation, Zn2GeO4:Er3+/g‐C3N4 shows more than five times enhancement in the catalytic efficiency compared to that of pure g‐C3N4 without any sacrificial agent in the photocatalytic reaction system. A series of theoretical and experimental results show that the charge density around Er, Ge, Zn, and O increases compared with Zn2GeO4:Er3+, while the charge density around C decreases compared with g‐C3N4. These results show that an efficient way of electron transfer is provided to promote charge separation, and the dual functions of CO2 molecular activation of Er3+ single atom and 4f levels as electron transport bridge are fully exploited. The pattern of combining single‐atom catalysis and heterojunction opens up new methods for enhancing photocatalytic activity.

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“…17 However, bulk g-C 3 N 4 has low photocatalytic efficiency as its low specic surface area, limited light absorption, and easy recombination of photo-generated carriers. 16,18 Following research found that the photocatalytic activity can be improved through modifying g-C 3 N 4 's morphology, [19][20][21] element doping, [22][23][24] and semiconductor compounding, [25][26][27] advancing the applications of g-C 3 N 4 in photocatalysis. 28,29 In these modication methods, the morphology control is a simple and effective way to adjust the surface structure to improve photocatalytic activity without introducing additional unit components during the synthesis process of the modied g-C 3 N 4 .…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of nitrogen-defective g-C₃N₄ for superior photocatalytic degradation of rhodamine B

et al. 2021

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Co-monomer engineering optimized electron delocalization system in carbon-bridging modified g-C3N4 nanosheets with efficient visible-light photocatalytic performance

Cited by 101 publications

References 79 publications

A 0D/2D Bi<sub>4</sub>V<sub>2</sub>O<sub>11</sub>/g-C<sub>3</sub>N<sub>4</sub> S-scheme Heterojunction with Rapid Interfacial Charges Migration for Photocatalytic Antibiotic Degradation

A 0D/2D Bi<sub>4</sub>V<sub>2</sub>O<sub>11</sub>/g-C<sub>3</sub>N<sub>4</sub> S-scheme Heterojunction with Rapid Interfacial Charges Migration for Photocatalytic Antibiotic Degradation

Erbium Single Atom Composite Photocatalysts for Reduction of CO₂ under Visible Light: CO₂ Molecular Activation and 4f Levels as an Electron Transport Bridge

Facile synthesis of nitrogen-defective g-C₃N₄ for superior photocatalytic degradation of rhodamine B

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Co-monomer engineering optimized electron delocalization system in carbon-bridging modified g-C3N4 nanosheets with efficient visible-light photocatalytic performance

Cited by 101 publications

References 79 publications

A 0D/2D Bi<sub>4</sub>V<sub>2</sub>O<sub>11</sub>/g-C<sub>3</sub>N<sub>4</sub> S-scheme Heterojunction with Rapid Interfacial Charges Migration for Photocatalytic Antibiotic Degradation

A 0D/2D Bi<sub>4</sub>V<sub>2</sub>O<sub>11</sub>/g-C<sub>3</sub>N<sub>4</sub> S-scheme Heterojunction with Rapid Interfacial Charges Migration for Photocatalytic Antibiotic Degradation

Erbium Single Atom Composite Photocatalysts for Reduction of CO2 under Visible Light: CO2 Molecular Activation and 4f Levels as an Electron Transport Bridge

Facile synthesis of nitrogen-defective g-C3N4 for superior photocatalytic degradation of rhodamine B

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Erbium Single Atom Composite Photocatalysts for Reduction of CO₂ under Visible Light: CO₂ Molecular Activation and 4f Levels as an Electron Transport Bridge

Facile synthesis of nitrogen-defective g-C₃N₄ for superior photocatalytic degradation of rhodamine B