Critical role of the heterojunction interface of silver decorated ZnO nanocomposite with sulfurized graphitic carbon nitride heterostructure materials for photocatalytic applications

Graphitic carbon nitride is a stable and distinct two dimensional carbon-based polymeric semiconductor with remarkable potentials in organic pollutants degradation, chemical sensors, the reduction of CO2, water splitting and other photocatalytic applications. Efficient utilization of this material is hampered by the nature of its band gap and the rapid recombination of electron-hole pairs. Heteroatom incorporation due to doping alters the symmetry of the semiconductor and has been among the adopted strategies to tailor the band gap for enhancing the visible-light harvesting capacity of the material. Electron modulation and enhancement of reaction active sites due to doping as evident from the change in specific surface area of doped graphitic carbon nitride is employed in this work for modeling the associated band gap using hybrid genetic algorithm-based support vector regression (GSVR) and extreme learning machine (ELM). The developed GSVR performs better than ELM-SINE (with sine activation function), ELM-TRANBAS (with triangular basis activation function) and ELM-SIG (with sigmoid activation function) model with performance enhancement of 69.92%, 73.59% and 73.67%, respectively, on the basis of root mean square error as a measure of performance. The four developed models are also compared using correlation coefficient and mean absolute error while the developed GSVR demonstrates a high degree of precision and robustness. The excellent generalization and predictive strength of the developed models would ultimately facilitate quick determination of the band gap of doped graphitic carbon nitride and enhance its visible-light harvesting capacity for various photocatalytic applications.

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Rational nanostructure design of graphitic carbon nitride for photocatalytic applications

Journal of Materials Chemistry A ◽

10.1039/c9ta01819k ◽

2019 ◽

Vol 7 (19) ◽

pp. 11584-11612 ◽

Cited By ~ 55

Author(s):

Na Tian ◽

Hongwei Huang ◽

Xin Du ◽

Fan Dong ◽

Yihe Zhang

Keyword(s):

Carbon Nitride ◽

Review Article ◽

Graphitic Carbon ◽

Graphitic Carbon Nitride ◽

Comprehensive Overview ◽

Photocatalytic Applications

This review article provides a comprehensive overview of the nanostructure design of g-C3N4 with various dimensional structures and promising applications.

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Metal-free hybrids of graphitic carbon nitride and nanodiamonds for photoelectrochemical and photocatalytic applications

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2017.01.038 ◽

2017 ◽

Vol 493 ◽

pp. 275-280 ◽

Cited By ~ 17

Author(s):

Li Zhou ◽

Huayang Zhang ◽

Xiaochen Guo ◽

Hongqi Sun ◽

Shaomin Liu ◽

...

Keyword(s):

Carbon Nitride ◽

Graphitic Carbon ◽

Graphitic Carbon Nitride ◽

Metal Free ◽

Photocatalytic Applications

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

Metals ◽

10.3390/met12010123 ◽

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.

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Porous graphitic carbon nitride for solar photocatalytic applications

Nanoscale Horizons ◽

10.1039/d0nh00046a ◽

2020 ◽

Vol 5 (5) ◽

pp. 765-786 ◽

Cited By ~ 13

Author(s):

Yang Li ◽

Xin Li ◽

Huaiwu Zhang ◽

Quanjun Xiang

Keyword(s):

Carbon Nitride ◽

Porous Graphitic Carbon ◽

Graphitic Carbon ◽

Graphitic Carbon Nitride ◽

Comprehensive View ◽

The Future ◽

Morphology Modification ◽

Photocatalytic Applications

This review summarizes the development of PCN, i.e., synthesis, morphology, modification, and application in recent years. This review can provide a comprehensive view of PCN and lay a foundation for the design of ideal photocatalysts in the future.

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Few-layer graphitic carbon nitride nanosheet with controllable functionalization as an effective metal-free activator for peroxymonosulfate photocatalytic activation: Role of the energy band bending

Chemical Engineering Journal ◽

10.1016/j.cej.2020.126072 ◽

2020 ◽

Vol 401 ◽

pp. 126072 ◽

Cited By ~ 11

Author(s):

Hai Guo ◽

Huai-Yuan Niu ◽

Chao Liang ◽

Cheng-Gang Niu ◽

Yu Liu ◽

...

Keyword(s):

Energy Band ◽

Carbon Nitride ◽

Graphitic Carbon ◽

Graphitic Carbon Nitride ◽

Band Bending ◽

Metal Free ◽

Energy Band Bending

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Doping of Graphitic Carbon Nitride with Non-Metal Elements and Its Applications in Photocatalysis

Catalysts ◽

10.3390/catal10101119 ◽

2020 ◽

Vol 10 (10) ◽

pp. 1119

Author(s):

Halyna Starukh ◽

Petr Praus

Keyword(s):

Organic Contaminants ◽

Carbon Nitride ◽

Co2 Reduction ◽

Graphitic Carbon ◽

Graphitic Carbon Nitride ◽

Metal Elements ◽

A Charge ◽

Application Fields ◽

Photocatalytic Applications ◽

Charge Carrier Lifetime

This review outlines the latest research into the design of graphitic carbon nitride (g-C3N4) with non-metal elements. The emphasis is put on modulation of composition and morphology of g-C3N4 doped with oxygen, sulfur, phosphor, nitrogen, carbon as well as nitrogen and carbon vacancies. Typically, the various methods of non-metal elements introducing in g-C3N4 have been explored to simultaneously tune the textural and electronic properties of g-C3N4 for improving its response to the entire visible light range, facilitating a charge separation, and prolonging a charge carrier lifetime. The application fields of such doped graphitic carbon nitride are summarized into three categories: CO2 reduction, H2-evolution, and organic contaminants degradation. This review shows some main directions and affords to design the g-C3N4 doping with non-metal elements for real photocatalytic applications.

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