Visible-Light-Responsive Graphitic Carbon Nitride: Rational Design and Photocatalytic Applications for Water Treatment

2016 ◽  
Vol 50 (23) ◽  
pp. 12938-12948 ◽  
Author(s):  
Qinmin Zheng ◽  
David P. Durkin ◽  
Justin E. Elenewski ◽  
Yingxue Sun ◽  
Nathan A. Banek ◽  
...  
Keyword(s):  
Water Treatment ◽  
Visible Light ◽  
Rational Design ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Photocatalytic Applications

scholarly journals Prediction of Band Gap Energy of Doped Graphitic Carbon Nitride Using Genetic Algorithm-Based Support Vector Regression and Extreme Learning Machine

Symmetry ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 411
Author(s):  
Taoreed O. Owolabi ◽  
Mohd Amiruddin Abd Rahman
Keyword(s):  
Genetic Algorithm ◽  
Visible Light ◽  
Band Gap ◽  
Carbon Nitride ◽  
Activation Function ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Support Vector ◽  
Learning Machine ◽  
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.

Research highlights: visible light driven photocatalysis and photoluminescence and their applications in water treatment

2016 ◽  
Vol 2 (1) ◽  
pp. 13-16 ◽  
Author(s):  
Qinmin Zheng ◽  
David T. Tan ◽  
Danmeng Shuai
Keyword(s):  
Water Treatment ◽  
Visible Light ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Red Phosphorus ◽  
Visible Light Driven ◽  
Innovative Materials ◽  
Materials Used

We discuss three innovative materials used in photocatalysis and photoluminescence for water treatment applications, including graphitic carbon nitride (g-C3N4), red phosphorus, and upconversion phosphors (Y2SiO5 doped with Pr and Li).

scholarly journals Self-catalytic membrane photo-reactor made of carbon nitride nanosheets

2016 ◽  
Vol 4 (30) ◽  
pp. 11666-11671 ◽  
Author(s):  
Kai-Ge Zhou ◽  
Daryl McManus ◽  
Eric Prestat ◽  
Xing Zhong ◽  
Yuyoung Shin ◽  
...  
Keyword(s):  
Water Treatment ◽  
Visible Light ◽  
Carbon Nitride ◽  
Low Cost ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Catalytic Membrane ◽  
Vacuum Filtration ◽  
Cost Efficient ◽  
Carbon Nitride Nanosheets

In this study we use a membrane photo-reactor (MPR) made of nanosheets of graphitic carbon nitride (g-C3N4), assembled by vacuum filtration, to make low-cost, efficient, easy-to-produce self-catalytic photo-reactors for water treatment under visible light.

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.

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