scholarly journals Influence of Hydrogenation on Morphology, Chemical Structure and Photocatalytic Efficiency of Graphitic Carbon Nitride

2021 ◽  
Vol 22 (23) ◽  
pp. 13096
Author(s):  
Daria Baranowska ◽  
Tomasz Kędzierski ◽  
Małgorzata Aleksandrzak ◽  
Ewa Mijowska ◽  
Beata Zielińska

In this contribution, the effect of hydrogenation conditions atmosphere (temperature and time) on physicochemical properties and photocatalytic efficiency of graphitic carbon nitride (g-C3N4, gCN) was studied in great details. The changes in the morphology, chemical structure, optical and electrochemical properties were carefully investigated. Interestingly, the as-modified samples exhibited boosted photocatalytic degradation of Rhodamine B (RhB) with the assistance of visible light irradiation. Among modified gCN, the sample annealed at 500 °C for 4 h (500-4) in H2 atmosphere exhibited the highest photocatalytic activity—1.76 times higher compared to pristine gCN. Additionally, this sample presented high stability and durability after four cycles. It was noticed that treating gCN with hydrogen at elevated temperatures caused the creation of nitrogen vacancies on gCN surfaces acting as highly active sites enhancing the specific surface area and improving the mobility of photogenerated charge carriers leading to accelerating the photocatalytic activity. Therefore, it is believed that detailed optimization of thermal treatment in a hydrogen atmosphere is a facile approach to boost the photoactivity of gCN.

Author(s):  
Guiyang Yu ◽  
Haitao Zhao ◽  
Chuanwang Xing ◽  
Luyan Guo ◽  
Xiyou Li

Microstructure modulation is an effective strategy to improve photocatalytic efficiency of graphitic carbon nitride (g-C3N4) for solar energy conversion. In the present work, abundant carbon defects and holes in g-C3N4...


2018 ◽  
Vol 5 (9) ◽  
pp. 2129-2143 ◽  
Author(s):  
Cuihua Tian ◽  
Xu Tao ◽  
Sha Luo ◽  
Yan Qing ◽  
Xihong Lu ◽  
...  

Cellulose nanofibrils were employed to anchor Ag onto a g-C3N4 framework to improve its photocatalytic activity remarkably under visible light.


Author(s):  
Xiaomei Liu ◽  
Yang Li ◽  
Xiaobin Fan ◽  
Fengbao Zhang ◽  
Guoliang Zhang ◽  
...  

Peroxydisulfate (PDS) can be activated by graphitic carbon nitride (g-C3N4) under irradiation, and the generated oxygen reactive species (ROSs) can degrade organic pollutants effectively. However, the photocatalytic activity of pristine...


2019 ◽  
Vol 19 (8) ◽  
pp. 5241-5248 ◽  
Author(s):  
Devina Rattan Paul ◽  
Rishabh Sharma ◽  
Priyanka Panchal ◽  
Ritu Malik ◽  
Anshu Sharma ◽  
...  

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