NiFe 2 O 4 /activated carbon nanocomposite as magnetic material from petcoke

Briceño, Sarah; Brämer‐Escamilla, Werner; Silva, Pedro; García, Javier Moreno; Castillo, Héctor Del; Villarroel, M.; Rodriguez, Juan-Martín; Ramos, Manuel; Morales, R.; Díaz, Yraida

doi:10.1016/j.jmmm.2014.01.073

Cited by 33 publications

(16 citation statements)

References 21 publications

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“…Additionally, a peak at 1544 cm -1 in the IR spectrum of PPAC indicated C = C of an aromatic ring [ 27 ]. When Fe was impregnated, the C = C aromatic signal disappeared, but carbonyl (C = O) and phenolic groups were found at 1627/1639 and 1415/1448 cm -1 for 3.8/8.6% Fe-impregnated media [ 28 ]. Also, the 3.8% Fe-impregnated medium had a smaller C = O signal than 8.6%.…”

Section: Resultsmentioning

confidence: 99%

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Enhanced Recyclable Magnetized Palm Shell Waste-Based Powdered Activated Carbon for the Removal of Ibuprofen: Insights for Kinetics and Mechanisms

2015

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A novel preparation method of magnetized palm shell waste-based powdered activated carbon (MPPAC, avg. size 112 μm) was developed. The prepared MPPAC was assessed by several physicochemical analyses, and batch tests were performed for ibuprofen (IBP) removal. Field emission scanning electron microscopy (FESEM) and N2 gas isotherms revealed that magnetite and maghemite were homogeneous and deposited mostly on the surface of PPAC without a significant clogging effect on the micropores. Isotherm results showed that 3.8% Fe (w/w) impregnated PPAC [MPPAC-Fe(3.8%)] had about 2.2-fold higher maximum sorption capacity (157.3 mg g-1) and a 2.5-fold higher sorption density (0.23 mg m-2) than pristine PPAC. Both Fourier-transform infrared spectroscopy (FTIR) and isotherm data indicated that the high sorption capacity and density of IBP by MPPAC was primarily attributable to donor-acceptor complexes with the C = O group and dispersive π-π interactions with the carbon surface. Based on kinetic and repeated adsorption tests, pore diffusion was the rate-limiting step, and MPPAC-Fe(3.8%) had about 1.9~2.8- and 9.1~15.8-fold higher rate constants than MPPAC-Fe(8.6%) and palm shell-waste granular activated carbon (PGAC, avg. size 621 μm), respectively. MPPAC showed almost eight fold greater re-adsorption capacity than PPAC due to a thermal catalytic effect of magnetite/maghemite.

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Section: Resultsmentioning

confidence: 99%

“…These peaks correspond to the intrinsic stretching vibration of Fe at a tetrahedral site. Furthermore, MPPAC-Fe(8.6%) had a peak at 790 cm -1 , assigned to an octahedral Fe-stretching vibration [ 28 ].…”

Section: Resultsmentioning

confidence: 99%

Enhanced Recyclable Magnetized Palm Shell Waste-Based Powdered Activated Carbon for the Removal of Ibuprofen: Insights for Kinetics and Mechanisms

2015

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“…[16][17][18][19] Up to now, magnetic separation has emerged as a robust highly efficient and fast separation tool with many advantages. [26][27][28][29] NiFe 2 O 4 -supported catalyst can be separated from the reaction medium by an external permanent magnet, which circumvents time-consuming and laborious separation steps and allows for continuous catalysis without decrease in activity. [26][27][28][29] NiFe 2 O 4 -supported catalyst can be separated from the reaction medium by an external permanent magnet, which circumvents time-consuming and laborious separation steps and allows for continuous catalysis without decrease in activity.…”

Section: Introductionmentioning

confidence: 99%

A novel magnetic NiFe₂O₄@graphene–Pd multifunctional nanocomposite for practical catalytic application

Zhao

Liu²

2015

RSC Adv.

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In this paper, we report a simple, efficient, and facile strategy to prepare a magnetically separable NiFe 2 O 4 @GN-Pd nanocomposite under hydrothermal conditions. This new kind of hybrid material has been fully characterized by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and vibrating sample magnetometry (VSM). The hybrid is constructed by spherical NiFe 2 O 4 and Pd nanoparticles with the particle sizes in the range of 10-20 nm, which are confined by monolayered GN sheet. The magnetic measurements show that the sample exhibits a typical superparamagnetic behavior, while presents finite coercivity of 9.46 Oe at room temperature. The saturation magnetization of the sample (36.82 emu g À1 ) is significantly lower than that for the reported bulk NiFe 2 O 4 particles (55 emu g À1 ), which also reflects the ultrafine nature of the sample. The as-prepared NiFe 2 O 4 @GN-Pd nanocomposite is an ideal recyclable catalyst for liquid-phase reactions owing to its stability and efficient magnetic separation. The Suzuki coupling reaction is used to demonstrate the catalytic efficiency. Additionally, the catalyst is completely recoverable with the simple application of an external magnetic field and the catalytic efficiency shows no obvious loss even after six repeated cycles. The easy synthesis, good magnetic performance and recoverability of the NiFe 2 O 4 @GN-Pd nanocomposite make it a promising catalytic material.

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“…This finding was confirmed with the results obtained by means of XRD. However, in γ-Fe 2 O 3 /Mn/GAC the porous structure disappeared with a faint spherical grain distribution [21,22].…”

Section: Resultsmentioning

confidence: 99%

Insights onto the Adsorption of MFe2O4 Nanoparticles Loaded onto Activated Carbon

Attia¹,

Shouman

El-Khouly

2017

Egypt. J. Chem.

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I N THIS WORK, magnetic nanoparticles of MFe 2 O 4 (M: Fe, Mn, Cu and Co) were prepared on the surface of granular activated carbon throughout the impregnation process, employing HNO 3 acid as the carbon modifying agent. These adsorbents were employed to assess the adsorption capability of p-chlorophenol from aqueous solution. The adsorbents were characterized by XRD, SEM, EDX and nitrogen adsorption isotherms. Additionally, the impact of various parameters such as pH, contact time was investigated. The results demonstrate that the current phase is mainly γ-Fe 2 O 3 (maghemite), spinel manganese, copper and cobalt ferrite, respectively. The equilibrium details were best ascribed by the Langmuir model accompanied by high adsorption capacity of 110mg/g for γ-Fe 2 O 3 / activated carbon. The kinetic experimental analysis of the adsorption model perfectly was correlated to the pseudo -second order kinetics. With the advantages inexpensive and fast processing, these adsorbents could attain promoting application in wastewater treating.

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NiFe 2 O 4 /activated carbon nanocomposite as magnetic material from petcoke

Cited by 33 publications

References 21 publications

Enhanced Recyclable Magnetized Palm Shell Waste-Based Powdered Activated Carbon for the Removal of Ibuprofen: Insights for Kinetics and Mechanisms

Enhanced Recyclable Magnetized Palm Shell Waste-Based Powdered Activated Carbon for the Removal of Ibuprofen: Insights for Kinetics and Mechanisms

A novel magnetic NiFe₂O₄@graphene–Pd multifunctional nanocomposite for practical catalytic application

Insights onto the Adsorption of MFe2O4 Nanoparticles Loaded onto Activated Carbon

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NiFe 2 O 4 /activated carbon nanocomposite as magnetic material from petcoke

Cited by 33 publications

References 21 publications

Enhanced Recyclable Magnetized Palm Shell Waste-Based Powdered Activated Carbon for the Removal of Ibuprofen: Insights for Kinetics and Mechanisms

Enhanced Recyclable Magnetized Palm Shell Waste-Based Powdered Activated Carbon for the Removal of Ibuprofen: Insights for Kinetics and Mechanisms

A novel magnetic NiFe2O4@graphene–Pd multifunctional nanocomposite for practical catalytic application

Insights onto the Adsorption of MFe2O4 Nanoparticles Loaded onto Activated Carbon

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A novel magnetic NiFe₂O₄@graphene–Pd multifunctional nanocomposite for practical catalytic application