Journal
RSC ADVANCES
Volume 4, Issue 47, Pages 24863-24869Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra03290j
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Funding
- Program for New Century Excellent Talents in University (NCET) [NCET-11-1011]
- National Natural Science Foundation of China [21103077]
- Natural Science Foundation of Liaoning Province [201202123]
- Natural Science Foundation of Liaoning Shihua University [2011XJJ-021]
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Fe3+-doped g-C3N4 and Fe2O3/g-C(3)N4 composite catalysts were prepared by a simple method using melamine and ferric nitrate as precursors. X-ray diffraction, UV-Vis spectroscopy, Fourier transform infrared spectra, scanning electron microscopy, photoluminescence, X-ray photoelectron spectroscopy and photocurrent measurements were used to characterize the prepared catalysts. The results indicated that Fe3+ was inserted at an interstitial position of g-C3N4 by coordinating to N atoms, which exist in a form completely different from those in the Fe2O3/g-C3N4 composite. The different form of Fe species caused the difference in optical properties, energy band structure and electrons-holes separation rate. The activities of Fe3+-doped g-C3N4 and Fe2O3/g-C3N4 composite catalysts were tested by the photocatalytic degradation of Rhodamine B (RhB) under visible light. The rate constant of Fe3+-doped g-C3N4 was 2.5 and 1.8 times higher than that of the g-C3N4 and Fe2O3/g-C3N4 composite. The possible mechanism is proposed.
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