Salt-template-assisted construction of honeycomb-like structured g-C3N4 with tunable band structure for enhanced photocatalytic H2 production

Yang, Fan; Liu, Dongzhi; Li, Yunxiang; Liu, Cheng; Ye, Jinhua

doi:10.1016/j.apcatb.2018.08.072

Cited by 163 publications

(61 citation statements)

References 61 publications

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“…The surface area was increased to (~ 148.5 m 2 g −1 ), which is four times higher than that of bulk g-C 3 N 4 (~ 23.8 m 2 g −1 ). The obtained OCN exhibited an excellent photocatalytic performance toward hydrogen evolution reaction including a hydrogen evolution rate of 3519.6 μmol g −1 h −1 for ~ 20 h and quantum efficiency (QE) of 26.96% at 400 nm, outperforming the bulk g-C 3 N 4 and most of the reported heteroatom-doping g-C 3 N 4 [22][23][24][25][26][27]. The physical characterizations and theoretical calculations indicated that the O-adsorption contributed to form a hollow structure by defect creation and the O-doping played a crucial role in the reduction of the band gap of g-C 3 N 4 , leading to the improvement of photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Band Engineering and Morphology Control of Oxygen-Incorporated Graphitic Carbon Nitride Porous Nanosheets for Highly Efficient Photocatalytic Hydrogen Evolution

Xiong

et al. 2021

Nano-Micro Lett.

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Graphitic carbon nitride (g-C3N4)-based photocatalysts have shown great potential in the splitting of water. However, the intrinsic drawbacks of g-C3N4, such as low surface area, poor diffusion, and charge separation efficiency, remain as the bottleneck to achieve highly efficient hydrogen evolution. Here, a hollow oxygen-incorporated g-C3N4 nanosheet (OCN) with an improved surface area of 148.5 m2 g−1 is fabricated by the multiple thermal treatments under the N2/O2 atmosphere, wherein the C–O bonds are formed through two ways of physical adsorption and doping. The physical characterization and theoretical calculation indicate that the O-adsorption can promote the generation of defects, leading to the formation of hollow morphology, while the O-doping results in reduced band gap of g-C3N4. The optimized OCN shows an excellent photocatalytic hydrogen evolution activity of 3519.6 μmol g−1 h−1 for ~ 20 h, which is over four times higher than that of g-C3N4 (850.1 μmol g−1 h−1) and outperforms most of the reported g-C3N4 catalysts.

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Section: Introductionmentioning

confidence: 99%

Band Engineering and Morphology Control of Oxygen-Incorporated Graphitic Carbon Nitride Porous Nanosheets for Highly Efficient Photocatalytic Hydrogen Evolution

Xiong

et al. 2021

Nano-Micro Lett.

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“…Secondly, excess of alkali metal salt is prerequisite for PHI formation, while heating of graphitic carbon nitride or cyanamide with only few weight percent of alkali metal hydroxide gives alkali metal doped covalent carbon nitride . Finally, precursors and conditions should be carefully selected in order to obtain crystalline PHIs rather than alkali metal modified carbon nitrides, N ‐deficient g‐C 3 N 4 , K + decorated g‐C 3 N 4 , or alkali metal doped g‐C 3 N 4 or simply change morphology of covalent g‐C 3 N 4 …”

Section: Introductionmentioning

confidence: 99%

Ionic Carbon Nitrides in Solar Hydrogen Production and Organic Synthesis: Exciting Chemistry and Economic Advantages

Savateev

Antonietti

2019

ChemCatChem

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Molecular photoredox complexes from the platinum group paved the way of organic photocatalysis. However, high price and difficulties related to removal and recycling hamper application of such complexes on the larger scale. Carbon nitride semiconductor photocatalysts are deprived at large extent of such limitations. Herein, we summarize application of ionic carbon nitrides in photocatalysis. A salt-like structure of ionic carbon nitrides comprising negatively charged poly (heptazine imide) anion and positively charged alkali metal cations gives rise to a number of unique properties and high activity in photocatalysis. The performance of ionic carbon nitrides in H 2 generation is up to 100 times higher compared with the covalent graphitic carbon nitrides. Eleven photocatalytic reactions mediated by ionic carbon nitrides and their long-lived radicals are reviewed. Economy of using carbon nitride photocatalysts in comparison with the photoredox complexes from the platinum group has been analyzed.

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“…Recently, graphitic carbon nitride (g-C3N4), with a layer structure, has been receiving more interest because of its low cost, nontoxic nature, high stability, visible-light response, and possibility of large-scale preparation. Moreover, an appropriate conduction band (CB) potential (about -1.12 eV vs. NHE) endows it with a strong capability to accept photoinduced electrons [21][22][23][24][25][26][27]. However, the photocatalytic activity of pristine g-C3N4 is always low owing to the fast recombination of the photogenerated charge carriers.…”

Section: Introductionmentioning

confidence: 99%

In situ fabrication of CdMoO4/g-C3N4 composites with improved charge separation and photocatalytic activity under visible light irradiation

Chai

Yan

Fan

et al. 2020

Chinese Journal of Catalysis

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Salt-template-assisted construction of honeycomb-like structured g-C3N4 with tunable band structure for enhanced photocatalytic H2 production

Cited by 163 publications

References 61 publications

Band Engineering and Morphology Control of Oxygen-Incorporated Graphitic Carbon Nitride Porous Nanosheets for Highly Efficient Photocatalytic Hydrogen Evolution

Band Engineering and Morphology Control of Oxygen-Incorporated Graphitic Carbon Nitride Porous Nanosheets for Highly Efficient Photocatalytic Hydrogen Evolution

Ionic Carbon Nitrides in Solar Hydrogen Production and Organic Synthesis: Exciting Chemistry and Economic Advantages

In situ fabrication of CdMoO4/g-C3N4 composites with improved charge separation and photocatalytic activity under visible light irradiation

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