CuFe2O4@graphene nanocomposite as a sorbent for removal of alizarine yellow azo dye from aqueous solutions

Abstract

CuFe 2 O 4 @graphene nanocomposite was synthesized by chemical co-precipitation method. The nanocomposite was characterized by Fourier infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Adsorption of alizarine yellow (AY) by graphene, CuFe 2 O 4 , and CuFe 2 O 4 @graphene nanocomposite was studied. Effect of different factors including agitation time, pH, and adsorbate concentration on the adsorption capacity of adsorbent for AY dye was investigated. Experimental results demonstrated that AY could be effectively removed from aqueous solution by CuFe 2 O 4 @graphene nanocomposite within 40 min of contact time and pH 3. Two common kinetic models, pseudo-first order and pseudo-second order, were employed to describe the adsorption kinetics. The results indicated that the adsorption kinetics of AY well matched with pseudosecond-order rate expression. The equilibrium adsorption was best described by the Langmuir isotherm model. Various thermodynamic parameters such as the Gibbs free energy (ΔG˚), enthalpy (ΔH˚), and entropy (ΔS˚) change were also evaluated. Thermodynamic results revealed that the adsorption of AY onto CuFe 2 O 4 @graphene is endothermic, spontaneously process and feasible in the range of 303-333 K. The adsorption capacity of CuFe 2 O 4 , graphene, and CuFe 2 O 4 @graphene was found to be 98, 105, and 145 mg g −1 for AY, respectively.

A SnO2/CeO2 Nano-Composite Catalyst for Alizarin Dye Removal from Aqueous Solutions

“…Table 3 represents a comparison of the performance of the present suggested sorbent with some of those previously described nano-materials for the removal of alizarin veiled. It can be seen from Table 3 that high maximum adsorption capacity [7], reasonable contact time [7,13,14,18,19,[36][37][38][39][40][41], high removal percentage [7,8,10,14,15,18,36,38,39,41] and low amount of adsorbent dosage [7,8,10,15,38] were offered by the present suggested nano-composite material in this work.…”

Functionalization of magnetic chitosan with graphene oxide for removal of cationic and anionic dyes from aqueous solution

“…Halloysite nanotube-Fe 3 O 4 and CuFe 2 O 4 @graphene, respectively (Duan, Liu, Chen, Zhang, & Liu, 2012;Hashemian, Rahimi, & Kerdegari, 2015). In another study by Fan et al, adsorption of methyl blue onto magnetic chitosan and graphene oxide (MCGO) was found to be strongly dependent on ionic strength, indicating an ion exchange mechanism (Lulu Fan, Chuannan Luo, Xiangjun Li, et al, 2012).…”

Magnetically Separable Ag/CuFe2O4 /Reduced Graphene Oxide Ternary Nanocomposite with High Performance for the Removal of Nitrophenols and Dye Pollutants from Aqueous Media

“…In the case of pure CuFe 2 O 4 ( Figure 2(c)), the two characteristic bands appeared at 565 and 445 cm -1 are related to the stretching vibrations of M−O (M = Fe and Cu) bonds in the tetrahedral and octahedral sites of spinel-type oxide, respectively. 43,44 As can be seen in Figure 2(d), the characteristic band of rGO at 1615 cm −1 related to the graphitic C=C bond and the vibrational bands of CuFe 2 O 4 in the range of 600-400 cm −1 were all observed in the IR spectrum of the nanocomposite sample which demonstrate the coexistence of rGO and CuFe 2 O 4 in this hybrid nanomaterial. Moreover, the disappearance of the characteristic bands of GO confirms the formation of rGO in the nanocomposite and the restoration of a graphitic structure in graphene.…”