High-yield and low-cost method to synthesize large-area porous g-C3N4 nanosheets with improved photocatalytic activity for gaseous nitric oxide and 2-propanol photodegradation

Han, Dongyuan; Liu, Jing; Cai, He; Zhou, Xue; Kong, Linghuan; Wang, Jiwei; Shi, Haifeng; Guo, Qiang; Fan, Xiaoxing

doi:10.1016/j.apsusc.2018.09.108

Cited by 48 publications

(23 citation statements)

References 35 publications

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“…In addition, different experimental parameters have been tested such as: processing temperatures (450-650 • C), duration (1-3 h), exposure of the precursor (covered or non-covered), atmospheres (inert gas or air), presence of templates (e.g., SiO 2 ) and other substances (e.g., glyoxal), high pressure, etc. [21][22][23]. In the case of melamine precursor, treatment at 450 • C for 3 h in Ar atmosphere have been reported as optimum conditions with respect to photocatalytic performance of the g-C 3 N 4 in NO x oxidation [24].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic H2 Evolution, CO2 Reduction, and NOx Oxidation by Highly Exfoliated g-C3N4

et al. 2020

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g-C3N4, with specific surface area up to 513 m2/g, was prepared via three successive thermal treatments at 550 °C in air with gradual precursor mass decrease. The obtained bulk and exfoliated (1ex, 2ex, and 3ex) g-C3N4 were characterized and tested as photocatalysts for H2 production, CO2 reduction, and NOx oxidation. The exfoliated samples demonstrated graphene-like morphology with detached (2ex) and sponge-like framework (3ex) of layers. The surface area increased drastically from 20 m2/g (bulk) to 513 m2/g (3ex). The band gap (Eg) increased gradually from 2.70 to 3.04 eV. Superoxide radicals (·O2−) were mainly formed under UV and visible light. In comparison to the bulk, the exfoliated g-C3N4 demonstrated significant increase in H2 evolution (~6 times), CO2 reduction (~3 times), and NOx oxidation (~4 times) under UV light. Despite the Eg widening, the photocatalytic performance of the exfoliated g-C3N4 under visible light was improved too. The results were related to the large surface area and low e−-h+ recombination. The highly exfoliated g-C3N4 demonstrated selectivity towards H2 evolution reactions.

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Section: Introductionmentioning

confidence: 99%

Photocatalytic H2 Evolution, CO2 Reduction, and NOx Oxidation by Highly Exfoliated g-C3N4

et al. 2020

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Section: Research Progress Of Pcn In Denitrificationmentioning

confidence: 99%

Section: Application Of Pcn In Environmental Catalysismentioning

confidence: 99%

“…Organic molecules (glyoxal), as a soft template, could be introduced in the synthesis process of porous PCN nanosheets, which showed enhanced O 2 activation and PODN activity (Figure 5D ). [ 194 ] The inorganic salt of (NH 4 ) 2 SO 4 and NH 4 HCO 3 as bubble soft templates was also selected to design the porous structure of PCN. [ 113 , 193 ] These bubble soft templates endowed PCN with a porous structure and enhanced specific surface area favored gas diffusion and transfer, meanwhile, rendered up‐shifted CB position favored charge separation and transportation (Figure 5E ).…”

Section: Application Of Pcn In Environmental Catalysismentioning

confidence: 99%

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Photocatalytic Air Purification Using Functional Polymeric Carbon Nitrides

Zhou¹,

et al. 2021

Advanced Science

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The techniques for the production of the environment have received attention because of the increasing air pollution, which results in a negative impact on the living environment of mankind. Over the decades, burgeoning interest in polymeric carbon nitride (PCN) based photocatalysts for heterogeneous catalysis of air pollutants has been witnessed, which is improved by harvesting visible light, layered/defective structures, functional groups, suitable/adjustable band positions, and existing Lewis basic sites. PCN-based photocatalytic air purification can reduce the negative impacts of the emission of air pollutants and convert the undesirable and harmful materials into value-added or nontoxic, or low-toxic chemicals. However, based on previous reports, the systematic summary and analysis of PCN-based photocatalysts in the catalytic elimination of air pollutants have not been reported. The research progress of functional PCN-based composite materials as photocatalysts for the removal of air pollutants is reviewed here. The working mechanisms of each enhancement modification are elucidated and discussed on structures (nanostructure, molecular structue, and composite) regarding their effects on light-absorption/utilization, reactant adsorption, intermediate/product desorption, charge kinetics, and reactive oxygen species production. Perspectives related to further challenges and directions as well as design strategies of PCN-based photocatalysts in the heterogeneous catalysis of air pollutants are also provided.

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“…17–23 However, the photocatalytic performance of pristine PCN, prepared by direct thermal polymerization of urea, melamine and dicyanamide, is restricted by the high recombination rate of photoexcited charge carriers. 24,25 To circumvent these challenges, various strategies have been widely exploited to improve the photocatalytic performance, including constructing advanced nanostructures, 25–29 doping with heteroatoms 30–32 and coupling with other semiconductors. 33 Zhao et al designed a novel mesoporous PCN with abundant pore structures and high specific surface area by a template method, which elevates the photocatalytic degradation activity by over 15-fold.…”

Section: Introductionmentioning

confidence: 99%

Bi-doped graphitic carbon nitride nanotubes boost the photocatalytic degradation of Rhodamine B

et al. 2022

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High-yield and low-cost method to synthesize large-area porous g-C3N4 nanosheets with improved photocatalytic activity for gaseous nitric oxide and 2-propanol photodegradation

Cited by 48 publications

References 35 publications

Photocatalytic H2 Evolution, CO2 Reduction, and NOx Oxidation by Highly Exfoliated g-C3N4

Photocatalytic H2 Evolution, CO2 Reduction, and NOx Oxidation by Highly Exfoliated g-C3N4

Photocatalytic Air Purification Using Functional Polymeric Carbon Nitrides

Bi-doped graphitic carbon nitride nanotubes boost the photocatalytic degradation of Rhodamine B

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