Efficient activation of persulfate by Fe<sub>3</sub>O<sub>4</sub>@β-cyclodextrin nanocomposite for removal of bisphenol A

Zhu, Yanyan; Yue, Min; Natarajan, Vinothkumar; Kong, Lingshuai; Ma, Longlong; Zhang, Yuqiang; Zhao, Qiang; Zhan, Jinhua

doi:10.1039/c8ra01696h

Cited by 59 publications

(23 citation statements)

References 51 publications

(78 reference statements)

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“…In detail, the core-level spectra of O 1s was composed of three main peaks at 531 eV (Fe-O bond), 530 eV (Fe-O-C bond), and 529 eV (Fe-OH bond), indicating that the catalyst surface was enriched with different oxygen-bonded functional groups and the formation of a stable heterojunction structure between the Fe3O4 and the GO sheets. The XPS spectra of the Fe 2p surface exhibited two peaks with binding energies of 711 eV and 725 eV, which corresponded to the two states of Fe 2p3/2 and Fe 2p1/2, respectively, implying the existence of Fe 3+ in Fe3O4 [48]. The binding energy at 718 eV appeared in the Fe 2p surface, indicating the characteristic of a satellite peak.…”

Section: Xps Evidencementioning

confidence: 97%

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

Pervez

Zarra

et al. 2020

Water

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Persulfate (PS)-activated, iron-based heterogeneous catalysts have attracted significant attention as a potential advanced and sustainable water purification system. Herein, a novel Fe 3 O 4 impregnated graphene oxide (Fe 3 O 4 @GO)-activated persulfate system (Fe 3 O 4 @GO+K 2 S 2 O 8 ) was synthesized by following a sustainable protocol and was tested on real wastewater containing dye pollutants. In the presence of the PS-activated system, the degradation efficiency of Rhodamine B (RhB) was significantly increased to a level of ≈95% compared with that of Fe 3 O 4 (≈25%). The influences of different operational parameters, including solution pH, persulfate dosage, and RhB concentration, were systemically evaluated. This system maintained its catalytic activity and durability with a negligible amount of iron leached during successive recirculation experiments. The degradation intermediates were further identified through reactive oxygen species (ROS) studies, where surface-bound SO 4 − was found to be dominant radical for RhB degradation. Moreover, the degradation mechanism of RhB in the Fe 3 O 4 @GO+K 2 S 2 O 8 system was discussed. Finally, the results indicate that the persulfate-activated Fe 3 O 4 @GO catalyst provided an effective pathway for the degradation of dye pollutants in real wastewater treatment.Water 2020, 12, 733 2 of 17 many advantages, such as a higher redox potential, wide pH range (2-11), longer life span, and more efficiency over •OH that enables excellent electron transfer of the oxidant toward higher contaminant degradation [6,7]. In general, the production of sulfate radicals can be obtained through PS activation by using several strategies, such as heat, ultraviolet, ultrasound, transition metal ions, carbonaceous-based materials, base, phenol, glucose, and ascorbic acid [8]. Consequently, transition-metal-based catalysts have been widely utilized as a PS activator due to their excellent catalytic efficiency [9]. However, the drawbacks of transition-metal-based catalysts for inhomogeneous systems include poor removal efficiency, precipitation of iron (III) as sludge, and less reusability, which has hindered their widespread use [10]. Hence, transition-metal-based heterogeneous catalyst systems have received tremendous attention for PS activation because of their environmentally friendly nature, high performance, simple operation stability, and high availability [11]. Iron (Fe)-based heterogeneous catalyst materials (e.g., Fe 3 O 4 ) have received much attention regarding frequently activating PS because of their high natural abundance, low price, and they could easily prevent secondary pollution through their recovery performance [12]. However, Fe 3 O 4 nanoparticles usually tend to aggregate in the solution, which can decrease their surface area and cause lower stability and catalytic efficiency [13]. Taking this into consideration, it is necessary to use a proper support that can enhance their overall performance. Graphene has been widely reported to be an emerging supporting material f...

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Section: Xps Evidencementioning

confidence: 97%

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

Pervez

Zarra

et al. 2020

Water

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“…2c, Table 1) [38,39]. Figure 2 d shows XPS spectra of the C 1s region with a spin-orbital splitting peak at 284.49 eV, which is assigned to carbon [40,41].…”

Section: Resultsmentioning

confidence: 99%

Electrocatalytic activity of AuCeO2/C towards ethylene glycol oxidation and oxygen reduction reactions

Kepenienė¹,

Stagniūnaitė²,

Upskuvienė³

et al. 2020

chemija

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AuCeO 2 /C and Au/C catalysts were obtained by adsorption of AuNPs on the CeO 2 /C and pure carbon (C) substrates from an Au colloidal solution. It has been found that AuNPs of ca. 50 nm in size were adsorbed on the surfaces of CeO 2 /C and C; however, electrocatalytic activity of the investigated AuCeO 2 /C and Au/C catalysts was different. Ethylene glycol oxidation current density values are ca. 3 times higher on the AuCeO 2 /C catalyst as compared to those of the bare Au/C catalyst. Moreover, the AuCeO 2 /C catalyst showed more positive onset potentials, as well as higher current in the mixed-kinetic-diffusion region towards the oxygen reduction reaction in an alkaline medium compared to that of the Au/C catalyst.

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“…In order to know the catalytic performance of each free radical species on the degradation of the OG, ethanol (EtOH) and tert ‐butyl alcohol (TBA) chemical deactivation tests were separately introduced in excess into the system as deactivation agents. Several studies have been done in the literature showing that alcohols such as EtOH, containing alpha hydrogen can react easily with SO 4 −• radicals and OH • , and are able to trap both SO 4 −• ( k = (1.6–7.7) × 10 7 ) and OH • ( k = (1.2–2.8) × 10 9 ) . While the TBA is considered a scavenger of OH • radicals only ( k = (3.8–7.6) × 10 8 ) .…”

Section: Resultsmentioning

confidence: 99%

“…Several studies have been done in the literature showing that alcohols such as EtOH, containing alpha hydrogen can react easily with SO 4 −• radicals and OH • , 65,66 and are able to trap both SO 4 −• (k = (1.6-7.7) × 10 7 ) and OH • (k = (1.2-2.8) × 10 9 ). 30,35,67 While the TBA is considered a scavenger of OH • radicals only (k = (3.8-7.6) × 10 8 ). 30,35,67 As shown in Fig.…”

Section: Possible Mechanismmentioning

confidence: 99%

“…Among these AOPs are, photocatalysis, [10][11][12] electrocatalysis, 13 photo-electrocatalysis, 14 electro-Fenton, [15][16][17][18] Fenton, 19,20 peroxicoagulation, 21,22 photo-Fenton, 23 sono-Fenton, 24 sonochemical methods, 25 hydrodynamic cavitation, 26 zero valent metals based AOPs, 27,28 and oxidation processes based on the use of radicals (SO 4 −• , OH • ). 29,30 However, the oxidation by the radicals…”

Section: Introductionmentioning

confidence: 99%

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Polyaniline coated hematite sand supported on graphene oxide (HS@PANI‐GO) as a new magnetic material for advanced catalytic oxidation based on sulfate radicals: optimization using response surface methodology

Fakir

Anfar

Benafqir

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: We report here on the synthesis of a new magnetic and natural material: polyaniline coated hematite sand supported on graphene oxide (HS@PANI-GO) which was used as an heterogeneous catalyst to activate persulfate (PS) for aqueous solution Orange G (OG) degradation. RESULTS:The characterization results have revealed that the hematite sand is rich in iron oxide, and the inorganic particles were well coated with polyaniline and successfully dispersed in graphene oxide. Further, catalytic oxidation experiments demonstrated that HS@PANI-GO material exhibited high activity in the PS activation for the OG degradation. It was found that complete OG removal from aqueous solution was achieved in 90 min at natural pH. In addition, the influence of various reaction conditions such as temperature, concentration of PS, catalyst dose, pH and decomposition time over the HS@PAN-GO/PS system were investigated and optimized. The catalyst HS@PAN-GO could be recycled easily by a magnet with good reusability. Finally, the effects of various parameters such as PS concentration, catalyst dose, initial OG concentration, and contact time, were investigated using the response surface methodology (RSM). It transpires that the experimental elimination of OG is 98.14%, as obtained under optimal conditions, was very close to the predicted value (96.58%) determined by RSM. CONCLUSION: This study provides a promising way for the activation of green oxidant 'PS', by using a new magnetic composite suited for environmental remediation and oxidation catalysis. RESULTS AND DISCUSSIONS CharacterizationThe crystalline structures of the various materials as determined by XRD are shown in Fig. 1. (JCPDS NO 33-0664). According to the XRD profile, the majority of the peaks observed at 2 = 24.19 ∘ , Figure 2. Scanning electron microscopy (SEM) images of (a, b) HS and (c, d) of HS@PANI.

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Efficient activation of persulfate by Fe₃O₄@β-cyclodextrin nanocomposite for removal of bisphenol A

Abstract: Persulfate (PS), the most commonly used activator for in situ chemical oxidation (ISCO), could couple with Fe3O4@β-CD for effectively degrading BPA.

Cited by 59 publications

References 51 publications

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

Electrocatalytic activity of AuCeO2/C towards ethylene glycol oxidation and oxygen reduction reactions

Polyaniline coated hematite sand supported on graphene oxide (HS@PANI‐GO) as a new magnetic material for advanced catalytic oxidation based on sulfate radicals: optimization using response surface methodology

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Efficient activation of persulfate by Fe3O4@β-cyclodextrin nanocomposite for removal of bisphenol A

Abstract: Persulfate (PS), the most commonly used activator for in situ chemical oxidation (ISCO), could couple with Fe3O4@β-CD for effectively degrading BPA.

Cited by 59 publications

References 51 publications

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

Electrocatalytic activity of AuCeO2/C towards ethylene glycol oxidation and oxygen reduction reactions

Polyaniline coated hematite sand supported on graphene oxide (HS@PANI‐GO) as a new magnetic material for advanced catalytic oxidation based on sulfate radicals: optimization using response surface methodology

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Product

Resources

About

Efficient activation of persulfate by Fe₃O₄@β-cyclodextrin nanocomposite for removal of bisphenol A