Journal
APPLIED SURFACE SCIENCE
Volume 280, Issue -, Pages 967-974Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2013.05.127
Keywords
Graphitic carbon nitride; Sodium nitrate; Photocatalysis; Methylene blue
Categories
Funding
- National Natural Science Foundation of China [21207089, 41076040, 20807036]
- Innovation Program of Shanghai Municipal Education Commission [11YZ113]
- SRF for ROCS
- SEM.
- Training Program for Young Teachers in Shanghai Colleges and Universities [egd11008]
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In this investigation, a facile modification of g-C3N4 through co-pyrolysis of melamine and sodium nitrate or potassium nitrate was reported and the as-synthesized samples were characterized by a collection of techniques, such as X-ray diffraction, scanning electron microscopy, transmission electron microscopy, UV-vis diffuse reflectance spectroscopy, nitrogen adsorption-desorption, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and elemental analysis. Based upon the analysis, we speculated that the g-C3N4 framework was partially destroyed to produce cyano-containing fragments, which resulted into the variation of physical and optical properties, further affecting the adsorption and photocatalytic performance of g-C3N4 on the dye methylene blue. Furthermore, we found that nitrate anions rather than sodium or potassium ions had important effect on the structure and photocatalytic performance of g-C3N4. In addition, the photocatalysis mechanism and reusability test were also investigated and discussed in the study. (C) 2013 Elsevier B.V. All rights reserved.
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