Preparation and enhanced photocatalytic performance of sulfur doped terminal-methylated g-C3N4 nanosheets with extended visible-light response

Li, Yunfeng; Wang, Shuai; Chang, Wei; Zhang, Luohong; Wu, Zhansheng; Song, Shuyan; Xing, Yan

doi:10.1039/c9ta07014a

Cited by 110 publications

(48 citation statements)

References 57 publications

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“…Meanwhile, the characteristic peak at 286.4 eV of R-CN was also enhanced, which indicated that there was C–NH x on the edge of the hepazine unit structure of R-CN, mainly caused by the terminal carbon-rich effect. 23 Table 1 also clearly showed that R-CN contains more C–C/CC bonds, whose proportion in total carbon increased from 12.63% (bulk g-C 3 N 4 ) to 22.68%. At the same time, the proportion of C-NH x also increased from 7.10% (bulk g-C 3 N 4 ) to 10.07%.…”

Section: Resultsmentioning

confidence: 84%

UV-Vis-NIR full-range-responsive carbon-rich carbon nitride nanotubes for enhanced photocatalytic performance

Yao

Zhang

et al. 2022

New J. Chem.

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Section: Resultsmentioning

confidence: 84%

UV-Vis-NIR full-range-responsive carbon-rich carbon nitride nanotubes for enhanced photocatalytic performance

Yao

Zhang

et al. 2022

New J. Chem.

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“…Density functional theory (DFT) indicates that doping S atom into the methyl modified melon networks could induce the VB near Fermi level to form the special midgap state that results in a great reduction of bandgap (~0.7 eV). The as-synthesized samples show an excellent photocatalytic H2 generation rate 62 .…”

Section: Functional Group Modificationmentioning

confidence: 94%

“…In contrast to nonmetal doping, doping metals such as Cu 78 , Mo 79 , Pd 80 , Mn 81 , Eu 82 , Fe 83 and alkali metals 84 , has also been widely studied to optimize the photoelectric performance of g-C3N4 by efficiently expanding light response, narrowing bandgap, promoting carriers transfer to increase the photocatalytic activity. In fact, the three-coordinated nitrogen atoms connecting the melon units usually exist in the molecular Reproduced with permission 62 . Copyright 2019, Royal Society of Chemistry.…”

Section: Metal Element Modificationmentioning

confidence: 99%

Recent Advances in Surface-Modified g-C3N4-Based Photocatalysts for H2 Production and CO2 Reduction

Li¹,

Zhang²,

Zhou³

et al. 2020

Acta Physico Chimica Sinica

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Solar energy is the largest renewable energy source in the world and the primary energy source of wind energy, tidal energy, biomass energy, and fossil fuel. Photocatalysis technology is a sunlight-driven chemical reaction process on the surface of photocatalysts that can generate H2 from water, decompose organic contaminants, and reduce CO2 into organic fuels. As a metal-free polymeric material, graphite-like carbon nitride (g-C3N4) has attracted significant attention because of its special band structure, easy fabrication, and low costs. However, some bottlenecks still limit its photocatalytic performance. To date, numerous strategies have been employed to optimize the photoelectric properties of g-C3N4, such as element doping, functional group modification, and construction of heterojunctions. Remarkably, these modification strategies are strongly associated with the surface behavior of g-C3N4, which plays a key role in efficient photocatalytic performance. In this review, we endeavor to provide a comprehensive summary of g-C3N4-based photocatalysts prepared through typical surface modification strategies (surface functionalization and construction of heterojunctions) and elaborate their special light-excitation and response mechanism, photo-generated carrier transfer route, and surface catalytic reaction in detail under visible-light irradiation. Moreover, the potential applications of the surface-modified g-C3N4-based photocatalysts for photocatalytic H2 generation and reduction of CO2 into fuels are summarized. Finally, based on the current research, the key challenges that should be further studied and overcome are highlighted. The following are the objectives that future studies need to focus on: (1) Although considerable effort has been made to develop a surface modification strategy for g-C3N4, its photocatalytic efficiency is still too low to meet industrial application standards. The currently obtained solar-to-hydrogen (STH) conversion efficiency of g-C3N4 for H2 generation is approximately 2%, which is considerably lower than the commercial standards of 10%. Thus, the regulation of the surface/textural properties and electronic band structure of g-C3N4 should be further elucidated to improve its photocatalytic performance. (2) Significant challenges remain in the design and construction of g-C3N4-based S-scheme heterojunction photocatalysts by facile, low-cost, and reliable methods. To overcome the limitations of conventional heterojunctions thoroughly, a promising S-scheme heterojunction photocatalytic system was recently reported. The study further clarifies the charge transfer route and mechanism during the catalytic process. Thus, the rational design and synthesis of g-C3N4-based S-scheme heterojunctions will attract extensive scientific interest in the next few years in this field. (3) First-principle calculation is an effective strategy to study the optical, electrical, magnetic, and other physicochemical properties of surface strategy modified g-C3N4, providing important information to reveal...

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“…This greatly limits practical utility of this tempting technique as UV photons collectively account for less than 5% of solar insolation and are negligible for indoor illumination. Thereby, ideal semiconductors for practical disinfection applications are those sensitive to visible-light photons [11] , [12] , [13] , [14] , [15] , [16] . Apart from light sensitivity, these semiconductors should also comprise earth-abundant elements and are nontoxic with good biosafety.…”

Section: Introductionmentioning

confidence: 99%

Mg2TiO4 spinel modified by nitrogen doping as a Visible-Light-Active photocatalyst for antibacterial activity

Chang

Qian

et al. 2021

Chemical Engineering Journal

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Preparation and enhanced photocatalytic performance of sulfur doped terminal-methylated g-C₃N₄ nanosheets with extended visible-light response

Abstract: Midgap electronic states generated in sulfur doped terminal-methylated g-C3N4 extend the visible-light response to 700 nm, leading to an efficient photocatalytic performance.

Cited by 110 publications

References 57 publications

UV-Vis-NIR full-range-responsive carbon-rich carbon nitride nanotubes for enhanced photocatalytic performance

UV-Vis-NIR full-range-responsive carbon-rich carbon nitride nanotubes for enhanced photocatalytic performance

Recent Advances in Surface-Modified g-C<sub>3</sub>N<sub>4</sub>-Based Photocatalysts for H<sub>2</sub> Production and CO<sub>2</sub> Reduction

Mg2TiO4 spinel modified by nitrogen doping as a Visible-Light-Active photocatalyst for antibacterial activity

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