Edge-Functionalized g-C3N4 Nanosheets as a Highly Efficient Metal-free Photocatalyst for Safe Drinking Water

Teng, Zhenyuan; Yang, Nailiang; Lv, Hongying; Wang, Sicong; Hu, Mengjie; Wang, Chengyin; Wang, Dan; Wang, Guoxiu

doi:10.1016/j.chempr.2018.12.009

Cited by 249 publications

(144 citation statements)

References 65 publications

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“…Comparison with g‐C 3 N 4 , a new peak at about 531.6 eV appears in g‐C 3 N 4 /C‐3 composite, which originates from the HO−C=O, agreeing well with the fitting result of C 1s spectrum. Previous reports have confirmed that the electron‐withdrawing group (HO−C=O) is favorable for promoting charge separation during photocatalysis . The high resolution N 1s XPS spectra of 3D C/g‐C 3 N 4 ‐3 can be decomposed into three different peaks centered at 398.8, 400.1, and 401.3 eV (Figure d), which are regarded as the sp 2 ‐bonded N(C−N=C), tertiary nitrogen N‐(C) 3 , and C‐NH, respectively, in accordance with those of bulk g‐C 3 N 4 .…”

Section: Resultssupporting

confidence: 67%

Three‐Dimensional Hierarchical Porous Carbon/Graphitic Carbon Nitride Composites for Efficient Photocatalytic Hydrogen Production

et al. 2019

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Developing low-cost, wide-source, and nontoxicity photocatalysts is highly desirable for application in efficient solar energy conversion. In this work, a series of nanosheet-assembled threedimensional (3D) hierarchical porous carbon/graphitic carbon nitride (3D C/g-C 3 N 4 ) composites have been successfully synthesized as efficient photocatalysts for hydrogen production. The optimal 3D C/g-C 3 N 4 shows the largest H 2 evolution rate of 1610 μmol h À 1 g À 1 , which is nearly seven times that of bulk g-C 3 N 4 . Such remarkably improved photocatalytic performance is mainly attributed to that: i) the 3D carbon effectively prevents nanosheets from agglomeration as well as serves as high speed channels for electron transport; ii) the interconnected porous network is favorable for the multiple reflections and utilization of light; and iii) the interfacial interaction between g-C 3 N 4 and 3D carbon is beneficial to the charge separation and transfer.

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Section: Resultssupporting

confidence: 67%

Three‐Dimensional Hierarchical Porous Carbon/Graphitic Carbon Nitride Composites for Efficient Photocatalytic Hydrogen Production

et al. 2019

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“…Direct mechanisms involve ultraviolet light to interact directly with essential biomacromolecule (protein, nucleic acid, deoxyribonucleic acid etc.) in the microorganisms to cause inactivation . Since the ultraviolet part takes only 4 % of the sunlight in terms of energy, disinfection of water through direct mechanisms is not efficient .…”

Section: Resultsmentioning

confidence: 99%

A Triazine‐Based Analogue of Graphyne: Scalable Synthesis and Applications in Photocatalytic Dye Degradation and Bacterial Inactivation

Chen

et al. 2020

Chemistry A European J

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Graphyne, a theorized carbon allotrope possessing only sp‐ and sp2‐hybridized carbon atoms, holds great potentials in many fields, especially in catalysis and energy‐transfer/storage devices. Using a bottom‐up strategy, we synthesized a new N‐doped graphyne analogue, triazine‐ and 1,4‐diethynylbenzene‐based graphyne TA‐BGY, in solution in gram‐scale. The unique sp/sp2 carbon‐conjugated TA‐BGY possesses an extended porous network structure with a BET surface area of approximately 300 m2 g−1. Owing to its low optical band gap (1.44 eV), TA‐BGY was expected to have many applications, which were exemplified by the photodegradation of methyl orange and photocatalytic bacterial inactivation.

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“…However, the VB potential of AKCN-0.010Fe (+1.72 V vs. NHE) is more negative than the standard redox potential of OHˉ/·OH (+1.99 V vs. NHE) and H 2 O/·OH (+2.37 V vs. NHE); hence, the weak oxidation potential of photoinduced h + is not sufficiently positive to oxidize OHˉ or H 2 O into ·OH radicals [ 66 ]. Furthermore, the

acts as a crucial active intermediate in the generation of H 2 O 2 (Equation (9)) [ 67 ].

…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic Degradation and Antibacterial Properties of Fe3+-Doped Alkalized Carbon Nitride

et al. 2020

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Discovering novel materials and improving the properties of existing materials are the main goals in the field of photocatalysis to increase the potential application of the materials. In this paper, a modified graphitic carbon nitride (g-C3N4) photocatalyst named Fe3+-doped alkalized carbon nitride, which couples the photocatalytic reaction with the Fenton reaction, is introduced to demonstrate its Rhodamine B (RhB) degradation and antibacterial properties. Under visible-light irradiation, the degradation rate of RhB was 99.9% after 200 min, while the antibacterial rates of Pseudomonas aeruginosa (P. aeruginosa), Escherichia coli (E. coli), and Staphylococcus aureus (S. aureus) after 300 min were 99.9986%, 99.9974%, and 99.9876%, respectively. Moreover, the repetitive experiments of RhB degradation demonstrate that the proposed photocatalysts have excellent stability and reusability. The active free radical trapping experiments reveal that the superoxide radical (·O2−) is the dominant reactive oxygen species. In addition, the Fenton reaction is introduced into the photocatalytic system due to the doping of Fe3+, and the hydroxyl radical (·OH) produced from the Fenton reaction further enhances the photocatalytic performance. The remarkable improvement in photocatalytic performance of the proposed photocatalyst can be attributed to its broader UV–visible absorption characteristic and the occurrence of the Fenton reaction.

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Edge-Functionalized g-C3N4 Nanosheets as a Highly Efficient Metal-free Photocatalyst for Safe Drinking Water

Cited by 249 publications

References 65 publications

Three‐Dimensional Hierarchical Porous Carbon/Graphitic Carbon Nitride Composites for Efficient Photocatalytic Hydrogen Production

Three‐Dimensional Hierarchical Porous Carbon/Graphitic Carbon Nitride Composites for Efficient Photocatalytic Hydrogen Production

A Triazine‐Based Analogue of Graphyne: Scalable Synthesis and Applications in Photocatalytic Dye Degradation and Bacterial Inactivation

Photocatalytic Degradation and Antibacterial Properties of Fe3+-Doped Alkalized Carbon Nitride

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