期刊
RSC ADVANCES
卷 5, 期 33, 页码 26281-26290出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra01206f
关键词
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资金
- Jiangsu University Scientific Research Funding [14JDG052]
- National Natural Science Foundation of China for Youths [21407065, 21177050]
- China Postdoctoral Science Foundation [2014M551520, 2014M560399]
- Natural Science Foundation of Jiangsu Province for Youths [BK20140533]
Nano-size g-C3N4 derivatives were fabricated by a simple dissolve-regrowth method in HNO3 solution followed by a calcination process. X-ray diffraction (XRD), Z-potential, elemental analysis and IR are used to investigate the structure, composition and the properties of the samples. Scanning electron microscopy (SEM) shows the average size of the nano-size g-C3N4 derivatives increases with increasing calcination temperature. Methyl orange (MO) dye was used as the target pollutant to investigate the photoactivity of the samples. The pure g-C3N4 can only degrade about 1.1% MO, while the g-C3N4 derivatives calcined at 300 degrees C can decompose about 31.9% of MO in 4 h. Besides, when a small amount of methylene blue (MB) solution was introduced, the g-C3N4-HNO3-300 can decompose about 75.8% in 4 h. The photoactivity of g-C3N4 was greatly enhanced after the modification process (especially with the assistance of MB). Additionally, this work supplied a simple method to modify materials with enhanced photoactivity. Finally, the possible reactive species and the possible mechanism were proposed based on Electron spin resonance (ESR) and XPS results.
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