Activated carbon/CoFe2O4 composites: Facile synthesis, magnetic performance and their potential application for the removal of malachite green from water

Combination of carboxymethyl chitosan-coated magnetic nanoparticles and chitosan-citrate complex gel beads as a novel magnetic adsorbent

“…Therefore, magnetite (Fe 3 O 4 ) is considered a promising magnetic material because it possesses a large surface area and excellent magnetic properties. In recent years, Fe 3 O 4 magnetic nanoparticles have been functionalized with various stabilizers, including organic or inorganic compounds (Hao, Man, & Hu, 2010;Kim, Lee, Chang, & Chang, 2013), polypeptides (Takahashi, Yoshino, & Matsunaga, 2010), polysaccharides (Chang, Yu, Ma, & Anderson, 2011;Zamora-Mora et al, 2014), activated carbon (Ai, Huang, Chen, Wei, & Jiang, 2010), silica or silanes (Badruddoza et al, 2013a;Zhang, Cheng, He, Chen, & Zhang, 2010), clay (Szabo et al, 2007), synthetic polymers (Sun et al, 2013), and ␤-cyclodextrin (Badruddoza et al, 2013b;Zhang, Wang, & Yang, 2014). Magnetic nanoparticles have attracted considerable attention because of their unique properties in the removal of several heavy metal or toxic ions (Lin, Zhang, Chen, & Qian, 2012;Wang et al, 2012).…”

Facile synthesis, characterization of a MnFe2O4/activated carbon magnetic composite and its effectiveness in tetracycline removal

“…The MnFe 2 O 4 content, magnetization measurement, BET surface area and pore volumes of the pure activated carbon and the prepared composites were listed in Table 1 [18,20,29,30].…”

Magnetic response and adsorptive properties for methylene blue of CoFe 2 O 4 /Co x Fe y /activated carbon magnetic composites

“…The Ms of CoFe 2 O 4 /Co x Fe y /AC composites increased with the CoFe 2 O 4 /Co x Fe y content from 9.44 emu g À1 (S-200) to 32.29 emu g À1 (S-50). Owing to the ferromagnetic Co x Fe y , Ms of the as-prepared magnetic composites was higher than other works [17,18,24], indicating the good magnetic response with the equivalent content magnetic mediums. In other works, 23 wt% Fe 3 O 4 were implanted into magnetic AC composites and only presented Ms of 2.78 emu g À1 [8].…”

“…In other works, 23 wt% Fe 3 O 4 were implanted into magnetic AC composites and only presented Ms of 2.78 emu g À1 [8]. CoFe 2 O 4 nanoparticles with the diameter of 14-20 nm deposited on the surface of AC to form CoFe 2 O 4 /AC composites with the surface area of 436 m 2 g À1 (AC: 909 m 2 g À1 ) and Ms of 7.6 emu g À1 [24]. And the magnetic response of S-200 (the weakest magnetic response with Ms of 9.44 emu g À1 ) with the outer magnet (surface magnetic field 1800 Oe) was observed in the deionized water, which the photos were given in Fig.…”