scholarly journals Nickel as a co-catalyst for photocatalytic hydrogen evolution on graphitic-carbon nitride (sg-CN): what is the nature of the active species?

2016 ◽  
Vol 52 (1) ◽  
pp. 104-107 ◽  
Author(s):  
Arindam Indra ◽  
Prashanth W. Menezes ◽  
Kamalakannan Kailasam ◽  
Dirk Hollmann ◽  
Marc Schröder ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Carbon Nitride ◽  
Structural Changes ◽  
Active Species ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Proton Reduction ◽  
Co Catalyst ◽  
Photocatalytic Hydrogen Evolution

Structural changes of a nickel co-catalyst on graphitic carbon nitride have been uncovered during photocatalytic proton reduction by using XPS and in situ EPR measurements.

scholarly journals Enhancement of photocatalytic hydrogen evolution with catalysts based on carbonized MOF-5 and g-C3N4

RSC Advances ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 4032-4039 ◽  
Author(s):  
Malgorzata Aleksandrzak ◽  
Krzysztof Sielicki ◽  
Ewa Mijowska
Keyword(s):  
Hydrogen Evolution ◽  
Carbon Nitride ◽  
Hydrogen Generation ◽  
Metal Organic Framework ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Co Catalyst ◽  
Photocatalytic Hydrogen Evolution ◽  
Photocatalytic Hydrogen Generation ◽  
Metal Organic

The study presents enhancement of photocatalytic hydrogen generation after metal–organic framework (MOF5) carbonization at 700 °C and its utilization as a co-catalyst of graphitic carbon nitride (gCN).

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

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.

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

RSC Advances ◽  
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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