Citation: ZHANG Hong-guang, FENG Li-juan, LI Chun-hu, WANG Liang. Preparation of graphitic carbon nitride with nitrogen-defects and its photocatalytic performance in the degradation of organic pollutants under visible light[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(7): 871-878. shu

Preparation of graphitic carbon nitride with nitrogen-defects and its photocatalytic performance in the degradation of organic pollutants under visible light

College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China

Corresponding author: WANG Liang, wangliang_good@163.com
Received Date: 2 April 2018
Revised Date: 12 June 2018

Fund Project: The project was supported by the State Key Laboratory of Heavy Oil Processing(MCTL contribution NO.137)the State Key Laboratory of Heavy Oil Processing MCTL contribution NO.137

Figures(13)

Various graphitic carbon nitride (g-C₃N₄) materials having nitrogen defects were synthesized by adding NaHCO₃ during the thermal polymerization of melamine. The as-prepared g-C₃N₄ samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), nitrogen adsorption-desorption, X-ray photoelectron spectroscopy (XPS), UV-visual diffuse reflectance spectroscopy (UV-vis DRS) and photoluminescence spectroscopy (PL); their photocatalytic activity in the degradation of Rhodamine B (RhB) under visible light irradiation was investigated. The results demonstrated that the unique nitrogen defects in g-C₃N₄ play an important role in broadening the absorption of visible light and enhancing the separation of electron-hole pairs. The photocatalytic activity of g-C₃N₄ with nitrogen defects is enhanced greatly; the RhB removal rates over the CNK0.005, CNK0.01, and CNK0.05 photocatalysts in 30 min reach 79.8%, 100.0% and 87.6%, respectively. In contrast, the pristine g-C₃N₄ free of nitrogen defects only gives an RhB degration rate of 59.8% under the same reaction conditions.
- g-C₃N₄,
- nitrogen defects,
- visible light,
- organic pollutants,
- degradation
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