The role of the defect on the adsorption and dissociation of water on graphitic carbon nitride

2015 ◽  
Vol 358 ◽  
pp. 363-369 ◽  
Author(s):  
Hong-Zhang Wu ◽  
Li-Min Liu ◽  
Shi-Jin Zhao
Keyword(s):  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Adsorption And Dissociation

scholarly journals The Role of Graphitic Carbon Nitride in the Formulation of Copper-Free Friction Composites Designed for Automotive Brake Pads

Metals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 123
Author(s):  
Vlastimil Matějka ◽  
Mara Leonardi ◽  
Petr Praus ◽  
Giovanni Straffelini ◽  
Stefano Gialanella
Keyword(s):  
Carbon Nitride ◽  
Room Temperature ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Main Role ◽  
Brake Pads ◽  
Pin On Disc ◽  
Brake Lining ◽  
Automotive Brake

In this study, graphitic carbon nitride (g-C3N4, labelled as gCN) was tested in the formulation of copper-free (Cu-free) friction mixtures, which are potentially interesting for brake pad manufacturing. Three formulations of friction composites were prepared starting from a common Cu-free master batch: (i) without graphite, (ii) with graphite and (iii) with gCN. The mixtures were pressed in the form of pins by hot-press moulding. The friction-wear performance of the prepared pins was investigated using a pin-on-disc (PoD) test at room temperature (RT), high temperature (HT) (400 °C) and, again, at room temperature (H-RT). The values of the friction coefficient (µ) for the composites with gCN (or graphite) were as follows: (i) RT test, µRT = 0.52 (0.47); (ii) HT test, µHT = 0.37 (0.37); (iii) RT after the HT tests, µH-RT = 0.49 (0.39). With respect to wear resistance, the samples with graphite performed better than the samples without this solid lubricant. To the best of our knowledge, this is the first report regarding the evaluation of the role of gCN in friction composites designed for automotive brake lining applications. The results indicate the main role of gCN as a soft abrasive.

Photocatalytic Carbon Dioxide Reduction: Exploring the Role of Ultrathin 2D Graphitic Carbon Nitride (g-C3N4)

2021 ◽  
pp. 131402
Author(s):  
Maansi Aggarwal ◽  
Soumen Basu ◽  
Nagaraj P. Shetti ◽  
Mallikarjuna N. Nadagouda ◽  
Eilhann E. Kwon ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Nitride ◽  
Carbon Dioxide Reduction ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride

The role of nitrogen defects in graphitic carbon nitride for visible-light-driven hydrogen evolution

2019 ◽  
Vol 21 (5) ◽  
pp. 2318-2324 ◽  
Author(s):  
Jiawei Xue ◽  
Mamoru Fujitsuka ◽  
Tetsuro Majima
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrogen Evolution ◽  
Light Absorption ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Visible Light Driven ◽  
Negative Factors

Extending the light absorption range of g-C3N4 by introducing N defects may be accompanied by some negative factors for the photocatalytic activity.

Graphitic carbon nitride synthesized by simple pyrolysis: role of precursor in photocatalytic hydrogen production

2019 ◽  
Vol 43 (18) ◽  
pp. 6909-6920 ◽  
Author(s):  
Mohammed Ismael ◽  
Ying Wu ◽  
Dereje H. Taffa ◽  
Patrick Bottke ◽  
Michael Wark
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Structural Defects ◽  
Photocatalytic Hydrogen Production

g-C3N4 with structural defects and low polymerization synthesized by urea as the precursor for photocatalytic H2 production under visible light.

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