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

ZHANG Hong-guang; FENG Li-juan; LI Chun-hu; WANG Liang

Volume 46 Issue 7

Jul. 2018

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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.

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.

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.

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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

Funds:

the State Key Laboratory of Heavy Oil Processing MCTL contribution NO.137

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Corresponding author: WANG Liang, Tel:0532-66782502, E-mail:wangliang_good@163.com
Received Date: 2018-04-02
Rev Recd Date: 2018-06-12

Available Online: 2021-01-23

Publish Date: 2018-07-10

Abstract

Abstract

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

本文的英文电子版由Elsevier出版社在ScienceDirect上出版(http://www.sciencedirect.com/science/journal/18725813).

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References(30)

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