Abstract
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 20min when the dosage of nano-Fe3O4 was 1g 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.
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