Constructing CeO2/nitrogen-doped carbon quantum dot/g-C3N4 heterojunction photocatalysts for highly efficient visible light photocatalysis

Nanoscale ◽  
2020 ◽  
Vol 12 (37) ◽  
pp. 19112-19120
Author(s):  
Houjuan Qi ◽  
Cai Shi ◽  
Xiaona Jiang ◽  
Min Teng ◽  
Zhe Sun ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Visible Light ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Visible Light Photocatalysis ◽  
Nitrogen Doped ◽  
Carbon Quantum Dot ◽  
Highly Efficient ◽  
Nitrogen Doped Carbon

Ternary CeO2/nitrogen-doped carbon quantum dot (NCQD)/graphitic carbon nitride (g-C3N4) heterojunction nanocomposites were prepared and tested for degrading tetracycline (TC) and generating H2.

Isotype heterostructure of bulk and nanosheets of graphitic carbon nitride for efficient visible light photodegradation of methylene blue

RSC Advances ◽  
2016 ◽  
Vol 6 (30) ◽  
pp. 24976-24984 ◽  
Author(s):  
Biswajit Choudhury ◽  
P. K. Giri
Keyword(s):  
Methylene Blue ◽  
Charge Carrier ◽  
Visible Light ◽  
Band Gap ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Visible Light Photocatalysis ◽  
Mean Lifetime

Isotype heterostructure of bulk and nanosheets of graphitic carbon nitride with effective band gap of 2.62 eV and charge carrier mean lifetime of 21 ns exhibits an efficient visible light photocatalysis.

scholarly journals Nitrogen-doped Carbon Nanospheres-Modified Graphitic Carbon Nitride with Outstanding Photocatalytic Activity

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Qiaoran Liu ◽  
Hao Tian ◽  
Zhenghua Dai ◽  
Hongqi Sun ◽  
Jian Liu ◽  
...  
Keyword(s):  
Environmental Remediation ◽  
Density Functional ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Carbon Nanospheres ◽  
Electron Hole ◽  
Practical Applications ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

AbstractMetals and metal oxides are widely used as photo/electro-catalysts for environmental remediation. However, there are many issues related to these metal-based catalysts for practical applications, such as high cost and detrimental environmental impact due to metal leaching. Carbon-based catalysts have the potential to overcome these limitations. In this study, monodisperse nitrogen-doped carbon nanospheres (NCs) were synthesized and loaded onto graphitic carbon nitride (g-C3N4, GCN) via a facile hydrothermal method for photocatalytic removal of sulfachloropyridazine (SCP). The prepared metal-free GCN-NC exhibited remarkably enhanced efficiency in SCP degradation. The nitrogen content in NC critically influences the physicochemical properties and performances of the resultant hybrids. The optimum nitrogen doping concentration was identified at 6.0 wt%. The SCP removal rates can be improved by a factor of 4.7 and 3.2, under UV and visible lights, by the GCN-NC composite due to the enhanced charge mobility and visible light harvesting. The mechanism of the improved photocatalytic performance and band structure alternation were further investigated by density functional theory (DFT) calculations. The DFT results confirm the high capability of the GCN-NC hybrids to activate the electron–hole pairs by reducing the band gap energy and efficiently separating electron/hole pairs. Superoxide and hydroxyl radicals are subsequently produced, leading to the efficient SCP removal.

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