Increasing the Visible Light Absorption of Graphitic Carbon Nitride (Melon) Photocatalysts by Homogeneous Self-Modification with Nitrogen Vacancies

2014 ◽  
Vol 26 (47) ◽  
pp. 8046-8052 ◽  
Author(s):  
Ping Niu ◽  
Li-Chang Yin ◽  
Yong-Qiang Yang ◽  
Gang Liu ◽  
Hui-Ming Cheng
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Visible Light Absorption ◽  
Nitrogen Vacancies

scholarly journals Electrostatic interaction mechanism of visible light absorption broadening in ion-doped graphitic carbon nitride

RSC Advances ◽  
2021 ◽  
Vol 11 (37) ◽  
pp. 22652-22660
Author(s):  
Zengyu Cen ◽  
Yuna Kang ◽  
Rong Lu ◽  
Anchi Yu
Keyword(s):  
Visible Light ◽  
Electrostatic Interaction ◽  
Light Absorption ◽  
Carbon Nitride ◽  
Interaction Mechanism ◽  
Graphitic Carbon ◽  
Electrostatic Attraction ◽  
Graphitic Carbon Nitride ◽  
Visible Light Absorption

H2O2 treated K-doped graphitic carbon nitride presents an enhanced visible light absorption, which is due to the electrostatic attraction between K ions and OOH ions inside graphitic carbon nitride.

A new precursor to synthesize g-C3N4 with superior visible light absorption for photocatalytic application

2017 ◽  
Vol 7 (9) ◽  
pp. 1826-1830 ◽  
Author(s):  
Saisai Yuan ◽  
Qitao Zhang ◽  
Bin Xu ◽  
Sixiao Liu ◽  
Jinquan Wang ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
One Pot ◽  
Visible Light Absorption ◽  
Photocatalytic Application ◽  
Calcination Method

Graphitic carbon nitride (g-C3N4) was synthesized with a new precursor (thiourea oxide) by a simple one-pot calcination method.

scholarly journals Photoelectrochemical Studies on Metal-Doped Graphitic Carbon Nitride Nanostructures under Visible-Light Illumination

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 983 ◽  
Author(s):  
I. Neelakanta Reddy ◽  
N. Jayashree ◽  
V. Manjunath ◽  
Dongseob Kim ◽  
Jaesool Shim
Keyword(s):  
Charge Transfer ◽  
Visible Light ◽  
Light Absorption ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Electron Hole ◽  
Photoelectrochemical Activity ◽  
Catalytic Sites ◽  
Metal Doped

Recently, the engineering of optical bandgaps and morphological properties of graphitic carbon nitride (g-C3N4) has attracted significant research attention for photoelectrodes and environmental remediation owing to its low-cost synthesis, availability of raw materials, and thermal physical–chemical stability. However, the photoelectrochemical activity of g-C3N4-based photoelectrodes is considerably poor due to their high electron–hole recombination rate, poor conductivity, low quantum efficiency, and active catalytic sites. Synthesized Ni metal-doped g-C3N4 nanostructures can improve the light absorption property and considerably increase the electron–hole separation and charge transfer kinetics, thereby initiating exceptionally enhanced photoelectrochemical activity under visible-light irradiation. In the present study, Ni dopant material was found to evince a significant effect on the structural, morphological, and optical properties of g-C3N4 nanostructures. The optical bandgap of the synthesized photoelectrodes was varied from 2.53 to 2.18 eV with increasing Ni dopant concentration. The optimized 0.4 mol% Ni-doped g-C3N4 photoelectrode showed a noticeably improved six-fold photocurrent density compared to pure g-C3N4. The significant improvement in photoanode performance is attributable to the synergistic effects of enriched light absorption, enhanced charge transfer kinetics, photoelectrode/aqueous electrolyte interface, and additional active catalytic sites for photoelectrochemical activity.

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.

scholarly journals Simultaneous layer exfoliation and defect activation in g-C3N4 nanosheets with air-water interfacial plasma: Spectroscopic defects probing with tailored optical properties

2021 ◽  
Author(s):  
Trishamoni Kashyap ◽  
Palash Jyoti Boruah ◽  
Heremba Bailung ◽  
Dirtha Sanyal ◽  
Biswajit Choudhury
Keyword(s):  
Optical Properties ◽  
Visible Light ◽  
Charge Transport ◽  
Transport Properties ◽  
Light Absorption ◽  
Charge Separation ◽  
Carbon Nitride ◽  
Graphitic Carbon Nitride ◽  
Visible Light Absorption ◽  
Carbon Nitride Nanosheets

Defect-activated ultrathin graphitic carbon nitride nanosheets (g-C3N4) show an enhanced visible light absorption, better charge-separation, and facile charge transport properties. These are requisite for the designing of an active photocatalyst....

scholarly journals Embedded carbon in a carbon nitride hollow sphere for enhanced charge separation and photocatalytic water splitting

Nanoscale ◽  
2020 ◽  
Vol 12 (13) ◽  
pp. 7339-7346 ◽  
Author(s):  
Lei Luo ◽  
Jiani Ma ◽  
Haixing Zhu ◽  
Junwang Tang
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Hollow Sphere ◽  
Light Absorption ◽  
Charge Separation ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Visible Light Absorption ◽  
Templating Method ◽  
Shape Selective

Graphitic carbon was fully embedded inside the graphitic carbon nitride hollow sphere via the modified shape-selective templating method in order to enchance visible light absorption and promote charge seperation.

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