Hexagonal carbon nitride microtube doped with tungsten and nitrogen vacancies: Photocatalytic hydrogen evolution and efficient Fenton-like photocatalytic degradation of p-nitrophenol

The enhanced photocatalytic hydrogen evolution performance of g-C3N4–Co3O4 2D–1D Z-scheme heterojunctions was achieved through the synergistic effect of the cobalt ion redox, conductive polyaniline, and a Co3O4 nanobelt.

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

Nano-Micro Letters ◽

10.1007/s40820-020-00571-6 ◽

2021 ◽

Vol 13 (1) ◽

Author(s):

Yunyan Wu ◽

Pan Xiong ◽

Jianchun Wu ◽

Zengliang Huang ◽

Jingwen Sun ◽

...

Keyword(s):

Surface Area ◽

Hydrogen Evolution ◽

Carbon Nitride ◽

Separation Efficiency ◽

Physical Adsorption ◽

Graphitic Carbon ◽

Graphitic Carbon Nitride ◽

Photocatalytic Hydrogen Evolution ◽

Band Engineering ◽

Highly Efficient

AbstractGraphitic 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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A comparison study of sodium ion- and potassium ion-modified graphitic carbon nitride for photocatalytic hydrogen evolution

RSC Advances ◽

10.1039/d1ra01395e ◽

2021 ◽

Vol 11 (26) ◽

pp. 15701-15709

Author(s):

Siyu Hu ◽

Anchi Yu ◽

Rong Lu

Keyword(s):

Size Effect ◽

Hydrogen Evolution ◽

Carbon Nitride ◽

Graphitic Carbon ◽

Sodium Ion ◽

Graphitic Carbon Nitride ◽

Comparison Study ◽

Photocatalytic Hydrogen Evolution ◽

Optical And Electronic Properties ◽

Ion Size

The ion size effect on graphitic carbon nitride is responsible for variations in its structure, optical and electronic properties, and hence the enhancement in photocatalytic hydrogen evolution.

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Effect of carbon and nitrogen double vacancies on the improved photocatalytic hydrogen evolution over porous carbon nitride nanosheets

Catalysis Science & Technology ◽

10.1039/d0cy02453h ◽

2021 ◽

Author(s):

Huihui Li ◽

Fuchun Ning ◽

Xiaofei Chen ◽

Anye Shi

Keyword(s):

Hydrogen Evolution ◽

Porous Carbon ◽

Carbon Nitride ◽

Soft Template ◽

One Pot ◽

Photocatalytic Hydrogen Evolution ◽

Carbon And Nitrogen ◽

Minimal Thickness ◽

Carbon Nitride Nanosheets

Porous carbon nitride nanosheets with carbon and nitrogen double vacancies have been synthesized by soft template-supported one-pot method. Besides a highly defined and unambiguous structure, it also shows minimal thickness...

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