Mechanism of Iron-doped Graphite-like Carbon Nitride Fenton-like/Photocatalytic Oxidation
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
7 7
Page:
84-88
Column:
Date of publication:
2020-04-01
- Keywords:
- iron-doped graphite-like carbon nitride; Fenton-like; photocatalytic oxidation; rhodamine B
- Abstract:
- Iron-doped graphite-like carbon nitride (FegC3N4) Fenton-like photocatalyst was prepared by using thermal polymerization and optimized by adjusting the iron-doped ratios. The optimal iron-doped ratio was 10%, and iron element could be completely doped into the graphite-like carbon nitride (g-C3N4) structure and formed Fe-N coordination bond. The degradation velocity and degradation rate of rhodamine B by Fe-g-C3N4 Fenton-like/photocatalytic oxidation were much higher than those of g-C3N4. The degradation rate of rhodamine B reached up to 87.9% after 10 minutes of reaction. The main active oxygen species were hydroxyl radicals, followed by superoxide radicals and hole electrons. The degradation rate of rhodamine B by Fe-g-C3N4 Fenton-like/photocatalytic oxidation was always more than 90% when the pH was in the range of 3-9, which greatly broadened the scope of application. The dosage of H2O2 greatly influenced the degradation efficiency of Fe-g-C3N4 Fenton-like/photocatalytic oxidation, and its optimal dosage was between 1.0 mmol/L and 1.5 mmol/L.
Last Update:
2020-04-01