Preparation of N-doped graphene quantum dots and their photocatalytic degradation activity for methylene blue

LI Dong-hui; FAN Jie-xin; WANG Xiao-min

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LI Dong-hui, FAN Jie-xin, WANG Xiao-min. Preparation of N-doped graphene quantum dots and their photocatalytic degradation activity for methylene blue. New Carbon Mater., 2015, 30(6): 545-549.

Citation:

LI Dong-hui, FAN Jie-xin, WANG Xiao-min. Preparation of N-doped graphene quantum dots and their photocatalytic degradation activity for methylene blue. New Carbon Mater., 2015, 30(6): 545-549.

LI Dong-hui, FAN Jie-xin, WANG Xiao-min. Preparation of N-doped graphene quantum dots and their photocatalytic degradation activity for methylene blue. New Carbon Mater., 2015, 30(6): 545-549.

Citation:

LI Dong-hui, FAN Jie-xin, WANG Xiao-min. Preparation of N-doped graphene quantum dots and their photocatalytic degradation activity for methylene blue. New Carbon Mater., 2015, 30(6): 545-549.

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Preparation of N-doped graphene quantum dots and their photocatalytic degradation activity for methylene blue

College of Materical Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China

Funds: National Natural Science Foundation of China (51172152, 51242007, 51572184).

Received Date: 2015-11-03
Accepted Date: 2016-01-05
Rev Recd Date: 2015-12-10
Publish Date: 2015-12-28

Abstract

Abstract

Nitrogen-doped graphene quantum dots (N-GQDs) were synthesized by the hydrothermal method, using citric acid and urea as the carbon and nitrogen sources, respectively. X-ray diffraction, Raman spectroscopy, transmission electron microscopy, fluorescence spectroscopy and UV-visible absorption spectroscopy were used to characterize their microstructure and photophysical properties. The cytotoxicity of the N-GQDs was tested using 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide. The photocatalytic degradation activity for methylene blue (MB) was investigated under visible light. Results show that the N-GQDs have a narrow size distribution, a high fluorescence and a low cytotoxicity. Photocatalytic degradation rate of the N-GQDs for MB reaches 82.5% under visible light irradiation for 120 min.
- Nitrogen doped graphene quantum dots(N-GQDs),
- Fluorescent property,
- Photocatalytic degradation,
- Microstructure

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References(21)

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