Direct Synthesis of Magnetic CoFe 2 O 4 Nanoparticles as Recyclable Photo-Fenton Catalysts for Removing Organic Dyes.

Herein, CoFe ₂ O ₄ nanoparticles were directly synthesized through a solution combustion method using ferric nitrate, cobalt nitrate, and glycine as raw materials. The effects of glycine on the phase composition and magnetic properties of the CoFe ₂ O ₄ products were investigated. When the fuel/ferric nitrate ratio was 0.8, the obtained product was pure CoFe ₂ O ₄ with an average particle size of 25 nm. Furthermore, the saturation magnetization is 77.3 emu/g, which is about 95.7% that of CoFe ₂ O ₄ bulk materials at room temperature and good for recycling. The photo-Fenton catalytic properties of CoFe ₂ O ₄ were investigated for assessing its efficacy in removing dyes. It could degrade the 20 ppm MB in 75 min. To improve the photo-Fenton catalytic performance, NH ₄ HCO ₃ and glucose were employed as additives. Due to the pores formed by NH ₄ HCO ₃ and glucose, the G-CoFe ₂ O ₄ and N-CoFe ₂ O ₄ could degrade the 20 ppm MB in 40 and 25 min, respectively. The results indicated that these additives can effectively improve the catalytic activity of CoFe ₂ O ₄ . The modified CoFe ₂ O ₄ is a promising alternative recyclable photo-Fenton catalyst for removing organic dyes.
Competing Interests: The authors declare no competing financial interest.
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