The catalytic effect of nano-Fe3O4 on RhB decolorization by CGDE process

摘要

A magnetic quasi-circular nano-Fe3O4 was synthesized by coprecipitation and used for the decolorization of rhodamine B (RhB) in contact glow discharge electrolysis (CGDE). The results indicated that nano-Fe3O4 significantly enhanced the decolorization of RhB. The decolorization efficiency reached 94.0% and 33.6% of RhB was mineralized in only 20 min when the dosage of nano-Fe3O4 was 1 g L-1. The effects of initial pH, temperature, RhB concentration and nano-Fe3O4 dosage on the decolorization efficiency and the catalytic mechanism were also studied. It has been demonstrated that H2O2 produced in CGDE underwent decomposition in the presence of nano-Fe3O4. Nano-Fe3O4 appears to be an excellent catalyst in the degradation of RhB solution by the CGDE process.