Direct Synthesis of Magnetic CoFe₂O₄ Nanoparticles as Recyclable Photo-Fenton Catalysts for Removing Organic Dyes

Abstract

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.

ZIF-8@CoFe2O4 as a highly efficient bifunctional electrocatalyst for the methanol oxidation and oxygen evolution reactions

“…33 Due to its chemical stability, high coercivity, water resistance, moderate saturation magnetization, and electrical insulation, cobalt ferrite is gaining popularity among bimetallic oxides. 34 CoFe 2 O 4 is widely used in wastewater treatment, 35 electrocatalytic applications (such as supercapacitors and overall water splitting), 36 Li-ion batteries, 37 the OER and ORR, 38 magnetic resonance imaging, 39 and photocatalytic and antibacterial applications. 40 In this study, ZIF-8@CoFe 2 O 4 composites were synthesized using a simple method (Scheme 1) and subsequently used as electrocatalysts for both the MOR and OER.…”

Design, Fabrication and Characterization of Multi‐Yolk@Shell NiCuFe2O4@mSiO2 Mesoporous Nanocomposite Spheres for the Synthesis of Pyrimido‐Quinolines under Solvent‐Free Conditions

“…Magnetic core attracted researchers because of easily separated in the chemical reactions. These used as a metallic and multimetallic magnetic catalyst in the chemical reactions such as; NiFe 2 O 4 , [15] CuFe 2 O 4 , [16] NiCuFe 2 O 4 , [17] Fe 3 O 4 [18] and CoFe 2 O 4 [19] . The magnetic mesoporous silica shell can be created through either soft templating method based on surfactants [20] .…”

“…These used as a metallic and multimetallic magnetic catalyst in the chemical reactions such as; NiFe 2 O 4 , [15] CuFe 2 O 4 , [16] NiCuFe 2 O 4 , [17] Fe 3 O 4 [18] and CoFe 2 O 4 . [19] The magnetic mesoporous silica shell can be created through either soft templating method based on surfactants. [20] The role of the mesoporous shell in hollow structures is to prevent the accumulation of nanoparticles, creating a highly available surface area.…”

Fast and Efficient Removal of Uranium onto a Magnetic Hydroxyapatite Composite: Mechanism and Process Evaluation

“…CoFe 2 O 4 , a compound with excellent magnetic and unique properties, has been widely used in applications, such as permanent magnets, storage devices, magnetic recording, electronics, and pigments [28][29][30][31]. Compared with Fe 3 O 4 , CoFe 2 O 4 has more advantages, such as simpler synthesis, more hydroxyl groups on the surface, and excellent chemical inertness [32][33][34][35]. Many researchers have verified the potential of CoFe 2 O 4 and its magnetic recovery [36][37][38].…”