Heterogeneous Photodecolorization of Methyl Green Catalyzed by Fe(II)-o-Phenanthroline/Zeolite Y Nanocluster

Abstract

The potential of Fe(II)-orthophenatrolin, as doped with synthetic zeolite Y nanocluster (Na-Y) via complexation process, after wet impregnation of parent zeolite with FeSO 4 aqueous solution, was studied as a photocatalyst in decolorization of Methyl Green (MG) under UV irradiation. The characterization of the synthesized zeolite nanocluster and the prepared catalyst was studied using X-ray powder diffraction (XRD), infrared spectroscopy (FT-IR), thermal analysis, and SEM methods. The dye photodecolorization process was studied considering the influence of experimental parameters and it was observed that photoreactivity of the photocatalyst was varied with catalyst amount, initial dye concentration, pH of dye solution, temperature, and the presence of KBrO 3 . The optimal experimental parameters were obtained as follows: catalyst amount: 1 gL −1 , dye concentration: 40 ppm, pH: 9, and active component value: 100 mg Fe(II)-orthophenatrolin per g catalyst. The reusability of the intended catalyst was also investigated. The degradation process obeyed first-order kinetics.2 International Journal of Photoenergy metal ions in their higher oxidation state, as Fe(III) and Cu(II), undergo readily photoreduction to Fe(II) and Cu(I), respectively, which is accompanied by oxidation of the organic ligand, or other sacrificial donors. Thus, the environmental photochemistry of the transition metal complexes with organic ligands has a crucial importance for the pollution abatement because it may cause the photodegradation of persistent pollutants, such as phenol and its derivatives or EDTA and related aminopolycarboxylic acids [11,12]. The mechanism of the photocatalysis by the transition metal complexes in a homogeneous phase has been described in [13].Generally, the environmental Fe compounds are classified into two groups, the hydroxo species and chelate complexes, depending on the nature of their ligand oxidation products [14]. The inner-and outer-sphere photoinduced electron transfer mechanisms have been reported for Fe 3+ complexes, that cause producing of • OH and • X (X − is the oxidizable ions or molecules present in the vicinity of the catalyst such as Cl − Br − and SCN − ), respectively [15][16][17].In the present study, nanocluster of zeolite Y was synthesized and characterized with FT-IR, XRD, thermal methods, and SEM. The zeolite was exchanged with Fe(II) solution. Then Fe(II)-o-phenanthroline/zeolite Y nano cluster (FO-ZYNC) photocatalyst was prepared. The activity of the obtained photocatalyst was evaluated by studying the photocatalytic decolorization of methyl green. The effects of catalyst dosage, methyl green concentration, pH, and temperature were studied as functions of percentage of decolorization under UV irradiation. For the sake of comparison, corresponding dark controls were also carried out.

Photodegradation of Methyl Green by Nickel‐Dimethylglyoxime/ZSM‐5 Zeolite as a Heterogeneous Catalyst

“…More light is absorbed by molecules of dye and the excitation of photocatalyst particles by photons will be reduced. ese results are in good accordance with the literature [34,37,39,40]. is is also simpli�ed in Table 1 where the degradation rate constant ( , min dye.…”

Removal Properties, Mechanisms, and Performance of Methyl Green from Aqueous Solution Using Raw and Purified Sejnane Clay Type

“…Similarly, an increase in peaks intensity specific to Al-O-H bonds (peaks 3640 and 3694) was remarked. ese modifications were also observed in X-ray diffraction diagrams [6,64].…”

“…where Qe is the quantity of the adsorbate at equilibrium (mg•g − 1 ); t is the contact time (min); k L is the Lagergren constant, adsorption rate constant for the first order (min − 1 ); and k B is the Blanchard constant, adsorption rate constant for the pseudo-second order (g•mol − 1 •min − 1 ). Equations (4) and (5) were converted to the linear form given in equations (6) and 7, respectively, for pseudo-first and pseudo-second orders. Linear plots are illustrated in Figure 14.…”

“…MG elimination has been object of multiple studies, such as MG elimination by photodecolorization [6,7], UV photolysis [8], biodegradation [9], and adsorption on activated carbon [10], graphene sheet [11], and activated bentonite [12].…”

Nano Fe/NaY zeolite: an efficient and reusable solid-supported catalyst for synthesis of 1-oxo-hexahydroxanthene and tetraketone derivatives

“…These results confirm incorporation of Fe ions into zeolite channels. In addition, the brown color after ion exchange with Fe ions is the primary evidence for incorporation of Fe into the zeolite framework [47]. The Fe/NaY zeolite was analyzed by X-ray diffraction to compare its crystalline state with the initial NaY zeolite.…”