Two-dimensional graphene/g-C3N4 in-plane hybrid heterostructure for enhanced photocatalytic activity with surface-adsorbed pollutants assistant

Li, Fan; Tang, Mei; Li, Tong; Zhang, Lili; Hu, Chun

doi:10.1016/j.apcatb.2019.118397

Cited by 77 publications

(15 citation statements)

References 39 publications

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“…Usually, both deconvoluted C 1s and N 1s spectra were employed to study the properties of g-C 3 N 4. The C 1s XPS spectra exhibited two peaks at a binding energy of 284.7 and 288.0 eV, corresponding to the adventitious carbon (C–C) and sp 2 -hybridized carbon (N–CN) structure, respectively, which proves the formation of the crystalline g-C 3 N 4 surface . Additionally, N 1s high-resolution XPS spectra confirm the typical peaks of g-C 3 N 4 at 398.7, 399.8, and 400.8 eV, which correspond to sp 2 -hybridized nitrogen (CN–C), bridging nitrogen (N–C3), and N–H bonding (the free amino groups (C–N–H) are caused by the charging effects), respectively .…”

Section: Characterization and Physicochemical Properties Of G-c3n4mentioning

confidence: 68%

Emerging Chemical Functionalization of g-C₃N₄: Covalent/Noncovalent Modifications and Applications

2020

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Atomically 2D thin-layered structures, such as graphene nanosheets, graphitic carbon nitride nanosheets (g-C3N4), hexagonal boron nitride, and transition metal dichalcogenides are emerging as fascinating materials for a good array of domains owing to their rare physicochemical characteristics. In particular, graphitic carbon nitride has turned into a hot subject in the scientific community due to numerous qualities such as simple preparation, electrochemical properties, high adsorption capacity, good photochemical properties, thermal stability, and acid-alkali chemical resistance, etc. Basically, g-C3N4 is considered as a polymeric material consisting of N and C atoms forming a tri-s-triazine network connected by planar amino groups. In comparison with most C-based materials, g-C3N4 possesses electron-rich characteristics, basic moieties, and hydrogen-bonding groups owing to the presence of hydrogen and nitrogen atoms; therefore, it is taken into account as an interesting nominee to further complement carbon in applications of functional materials. Nevertheless, g-C3N4 has some intrinsic limitations and drawbacks mainly related to a relatively poor specific surface area, rapid charge recombination, a limited light absorption range, and a poor dispersibility in both aqueous and organic mediums. To overcome these shortcomings, numerous chemical modification approaches have been conducted with the aim of expanding the range of application of g-C3N4 and enhancing its properties. In the current review, the comprehensive survey is conducted on g-C3N4 chemical functionalization strategies including covalent and noncovalent approaches. Covalent approaches consist of establishing covalent linkage between the g-C3N4 structure and the chemical modifier such as oxidation/carboxylation, amidation, polymer grafting, etc., whereas the noncovalent approaches mainly consist of physical bonding and intermolecular interaction such as van der Waals interactions, electrostatic interactions, π–π interactions, and so on. Furthermore, the preparation, characterization, and diverse applications of functionalized g-C3N4 in various domains are described and recapped. We believe that this work will inspire scientists and readers to conduct research with the aim of exploring other functionalization strategies for this material in numerous applications.

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Section: Characterization and Physicochemical Properties Of G-c3n4mentioning

confidence: 68%

Emerging Chemical Functionalization of g-C₃N₄: Covalent/Noncovalent Modifications and Applications

2020

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“…Prior investigations with vdWHs, including BP/GaN 31 , ZnO/MoS 2 32 , GaN/GeC 33 , 34 , ZnO/WSe 2 35 , blue phosphorene/g-GaN 36 , graphene/g-C 3 N 4 37 , CdO/CdS 38 , h -BN/C 2 N 39 , ZnO/GeC 40 , and blue phosphorene/MoS 2 41 , have outlined some promising optoelectronic features. These vdWHs demonstrate a highly tunable bandgap, large absorption coefficient, efficient isolation of the carrier, and contingent stacking tunability resulting in improved photocatalytic operations.…”

Section: Introductionmentioning

confidence: 99%

Superior tunable photocatalytic properties for water splitting in two dimensional GeC/SiC van der Waals heterobilayers

Islam

Mitul

et al. 2021

Sci Rep

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The photocatalytic characteristics of two-dimensional (2D) GeC-based van der Waals heterobilayers (vdW-HBL) are systematically investigated to determine the amount of hydrogen (H2) fuel generated by water splitting. We propose several vdW-HBL structures consisting of 2D-GeC and 2D-SiC with exceptional and tunable optoelectronic properties. The structures exhibit a negative interlayer binding energy and non-negative phonon frequencies, showing that the structures are dynamically stable. The electronic properties of the HBLs depend on the stacking configuration, where the HBLs exhibit direct bandgap values of 1.978 eV, 2.278 eV, and 2.686 eV. The measured absorption coefficients for the HBLs are over ~ 105 cm−1, surpassing the prevalent conversion efficiency of optoelectronic materials. In the absence of external strain, the absorption coefficient for the HBLs reaches around 1 × 106 cm−1. With applied strain, absorption peaks are increased to ~ 3.5 times greater in value than the unstrained HBLs. Furthermore, the HBLs exhibit dynamically controllable bandgaps via the application of biaxial strain. A decrease in the bandgap occurs for both the HBLs when applied biaxial strain changes from the compressive to tensile strain. For + 4% tensile strain, the structure I become unsuitable for photocatalytic water splitting. However, in the biaxial strain range of − 6% to + 6%, both structure II and structure III have a sufficiently higher kinetic potential for demonstrating photocatalytic water-splitting activity in the region of UV to the visible in the light spectrum. These promising properties obtained for the GeC/SiC vdW heterobilayers suggest an application of the structures could boost H2 fuel production via water splitting.

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“…The structures such as heptazine in CN materials can be further confirmed by solid‐state NMR (nuclear magnetic resonance spectroscopy) 35,66,67 . Electron paramagnetic resonance spectroscopy confirms the formation of nitrogen or oxygen vacancies 66,68 …”

Section: Preparation and Characterizations Of Cn Materialsmentioning

confidence: 87%

Advances of the functionalized carbon nitrides for electrocatalysis

Fan

Sun

et al. 2022

Carbon Energy

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Over the past few decades, the design and development of carbon materials have occurred at a rapid pace. In particular, these porous graphene-like carbon nitride materials have received considerable attention due to their superior structures and performances in the energy transformation field. In this review, nitrogenated holey two-dimensional graphene and polymeric carbon nitride will be discussed in depth. The structural properties, synthetic methods, and applications including electrocatalytic reactions, such as hydrogen evolution reaction, oxygen reduction reaction, oxygen evolution reaction, and nitrogen reduction reaction, will be presented in detail. Finally, we will present the outlooks on the current obstacles to the development of carbon nitride materials. This comprehensive understanding will help guide and motivate researchers to develop and modify carbon nitride materials with better properties in the future.

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Two-dimensional graphene/g-C3N4 in-plane hybrid heterostructure for enhanced photocatalytic activity with surface-adsorbed pollutants assistant

Cited by 77 publications

References 39 publications

Emerging Chemical Functionalization of g-C₃N₄: Covalent/Noncovalent Modifications and Applications

Emerging Chemical Functionalization of g-C₃N₄: Covalent/Noncovalent Modifications and Applications

Superior tunable photocatalytic properties for water splitting in two dimensional GeC/SiC van der Waals heterobilayers

Advances of the functionalized carbon nitrides for electrocatalysis

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Two-dimensional graphene/g-C3N4 in-plane hybrid heterostructure for enhanced photocatalytic activity with surface-adsorbed pollutants assistant

Cited by 77 publications

References 39 publications

Emerging Chemical Functionalization of g-C3N4: Covalent/Noncovalent Modifications and Applications

Emerging Chemical Functionalization of g-C3N4: Covalent/Noncovalent Modifications and Applications

Superior tunable photocatalytic properties for water splitting in two dimensional GeC/SiC van der Waals heterobilayers

Advances of the functionalized carbon nitrides for electrocatalysis

Contact Info

Product

Resources

About

Emerging Chemical Functionalization of g-C₃N₄: Covalent/Noncovalent Modifications and Applications

Emerging Chemical Functionalization of g-C₃N₄: Covalent/Noncovalent Modifications and Applications