Nano γ-Fe2O3/bentonite magnetic composites: Synthesis, characterization and application as adsorbents

Zhang, Huilin; Liang, Xiaoyu; Yang, Chao; Niu, Chunge; Wang, Jide; Su, Xintai

doi:10.1016/j.jallcom.2016.07.036

Cited by 49 publications

(13 citation statements)

References 33 publications

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“…43 These diffraction peaks indicated the presence of the aluminum silicate structure of the NBent material, with its amorphous nature and confirmed that the sample was composed primarily of montmorillonite (M) in its hexagonal structure, quartz (Q) in its trigonal structure, and feldspar (F) with its albite structure, as the dominant clay mineral. 43,44 In case of the PP nanocomposites, samples with different wt% of CdO-NPs and NBent (Figure 2D-F) were compared with the XRD pattern of pure PP (Figure 2A). It was clearly observed that the expected additional characteristic reflection peaks of CdO-NPs and/or NBent would appear in their regular positions, according to their T A B L E 2 Chemical composition, thickness (X), density (ρ), and weight fraction elements of the prepared PP nanocomposite samples quantities, referring to the successful incorporation of these nanofillers in the PP matrix with little effect on its crystal structure.…”

Section: Fabrication Of Polymer Nanocomposite Sheetsmentioning

confidence: 59%

“…Also, the typical composition of nano‐bentonite can be seen in the two medium peaks at 464.78 and 605.59 cm −1 , which corresponded to both the AlOSi octahedral vibrations and those of SiOSi bending, respectively. Besides, the two weak peaks at 686.42 and 786.95 cm −1 are assigned to the out‐of‐plane vibrations of AlO and SiO 43 . The peak at 3622.74 cm −1 corresponded to the stretching vibrations of hydroxyl groups coordinated to the octahedral Al 3+ cations 44 …”

Section: Resultsmentioning

confidence: 99%

“…01‐088‐0891, the standard JCPDS file for this material 43 . These diffraction peaks indicated the presence of the aluminum silicate structure of the NBent material, with its amorphous nature and confirmed that the sample was composed primarily of montmorillonite (M) in its hexagonal structure, quartz (Q) in its trigonal structure, and feldspar (F) with its albite structure, as the dominant clay mineral 43,44 . In case of the PP nanocomposites, samples with different wt% of CdO‐NPs and NBent (Figure 2D‐F) were compared with the XRD pattern of pure PP (Figure 2A).…”

Section: Resultsmentioning

confidence: 99%

“…Besides, the two weak peaks at 686.42 and 786.95 cm −1 are assigned to the out-of-plane vibrations of Al O and Si O. 43 The peak at 3622.74 cm −1 corresponded to the stretching vibrations of hydroxyl groups coordinated to the octahedral Al 3+ cations. 44 The FT-IR spectra of PP nanocomposites with the following compositions: 20.0 wt% CdO-NPs and 20.0 wt% NBent (Figure 3D), 40.0 wt% CdO-NPs (Figure 3E), and 40.0 wt% NBent (Figure 3F) showed almost all the characteristic absorption peaks corresponding to their constituents with some shifting in the wave number, as opposed to their pure form (Figure 3A-C).…”

Section: Fourier Transform-infrared Spectroscopy (Ft-ir)mentioning

confidence: 98%

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Synergistic effect of nano‐bentonite and nanocadmium oxide doping concentrations on assembly, characterization, and enhanced gamma‐rays shielding properties of polypropylene ternary nanocomposites

et al. 2021

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It has been confirmed from an experimental, as well as a theoretical, standpoint that metal oxide polymer nanocomposites (MPNCs) represent a new category of advanced materials effective in radiation shielding. In this study, novel (PP/CdO-NPs-NBent) ternary nanocomposites were designed, based on doping polypropylene (PP) with two different nanofillers, namely cadmium oxide nanoparticles (CdO-NPs) and nano-bentonite (NBent), to function as promising alternatives for γ-ray shielding. The PP/(x)CdO(40-x)NBent nanocomposites samples for x = 0.0, 10.0, 20.0, 30.0, and 40.0 wt% filling concentration were fabricated using the compression molding technique. The surface morphology of the nanoparticles, as well as the corresponding nanocomposites, along with their structural and thermal characteristics was studied using TGA, XRD, SEM, and FT-IR. A NaI detector was used along with different γ-ray photon energies

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Section: Fabrication Of Polymer Nanocomposite Sheetsmentioning

confidence: 59%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Fourier Transform-infrared Spectroscopy (Ft-ir)mentioning

confidence: 98%

See 2 more Smart Citations

Synergistic effect of nano‐bentonite and nanocadmium oxide doping concentrations on assembly, characterization, and enhanced gamma‐rays shielding properties of polypropylene ternary nanocomposites

et al. 2021

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“…5, the specific surface area, the total pore volume, and the average pore diameter were obtained and shown in Table 2. Composites showed significant increases in terms of their BET surface area, pore volume, and average size compared with CTAB-Mt and the success of Fe 3 O 4 -(CTAB-Mt) was evident from increased interlayer spacing 19 . The majority of the pores were macropores for the CTAB-Mt and mesoporous for Fe 3 O 4 -(CTAB-Mt).…”

Section: Synthesis Of Fe 3 O 4 -(Ctab-mt)mentioning

confidence: 99%

Synthesis and Characteristics of the Magnetic Properties of Fe3o4 – (Ctab-Montmorillonite) Composites Based on Variation in Fe3+/Fe2+Concentrations

Siregar¹,

Wijaya²,

Kunarti³

et al. 2018

Orient. J. Chem

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This research aims to determine characteristics of the magnetic properties of Fe 3 O 4 -(CTAB-Montmorillonite) composites and the effect of variation in Fe 3+ /Fe 2+ concentrations on the characteristics of Fe 3 O 4 -(CTAB-Montmorillonite) composites. Fe 3 O 4 -(CTAB-Montmorillonite) composites were synthesized using an in situ co-precipitation method. The synthesis was carried out by mixing FeCl 3 ·6H 2 O and FeSO 4 ·7H 2 O (in different concentrations) with a mole ratio of Fe 3+ to Fe 2+ by 2:1, which was then mixed into the CTAB-montmorillonite suspension. This mixture was stirred using a magnetic stirrer at 3500 rpm for 30 min. at a temperature of 85 °C, then the ammonia solution 25% was added. reaction lasted for 24 hours. The resulting composites were characterized using XRD, BET, and VSM to measure the magnetic properties of the materials. Results of the XRD data analysis showed that the values of d(311) is equal to 2.5686 Å and d(220) is equal to 2.947 Å, which are the characteristics of the materials known as magnetite. Based on the VSM data obtained, the magnetic saturation (Ms) values for samples of different concentrations were as follows: SH01=14.0 emu/g, SH02= 29.0 emu/g, SH03= 28.9 emu/g, SH04= 45.2 emu/g, and SH05= 64.1 emu/g.

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Assessment of the adsorption capacity of phenol on magnetic activated carbon

Júnior

Araújo

Simões

et al. 2021

Asia-Pacific J Chem Eng

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In this work, an alternative utilization of agro-industrial waste coconut endocarp (Cocos nucifera L.) as raw material for the synthesis of magnetic adsorbent aiming the phenol removal is proposed. The synthetized adsorbent, denominated magnetic activated carbon (MAC), was prepared by coprecipitation of cobalt ferrite (CoFe 2 O 4 ) onto activated carbon surface obtained by carbonization of coconut endocarp. Characterization of MAC was carried out by point of zero charge (PZC), Brunauer, Emmett, and Teller (BET) surface area, scanning electron microscopy (SEM), x-ray fluorescence (XRF), Fourier transform infrared spectroscopy (FTIR), x-ray diffractometry (XRD) analysis, and magnetization curves. Adsorption experiments were performed in batch system to evaluate kinetics and equilibrium of phenol adsorption. Adsorbent regeneration method was proposed to evaluate the reutilization of MAC in successive cycles of adsorption-desorption. Resultsshowed that obtained magnetic compounds present cubic phase structure covered in activated carbon surface. MAC has microporous structure with functional groups like carbonyl and hydroxyl that can behave as adsorption sites.Kinetic studies indicate that adsorption rate increased rapidly around the initial 60 min, reaching equilibrium at 240 min; following pseudo-first-order and pseudo-second-order kinetic models in characterization concentrations of 50 and 100 mg L À1 , only the second-order model fit the kinetic data at 150 mg L À1 , while both models were outside the chi-square interval at 200 and 230 mg L À1 . The adsorption equilibrium is represented by Langmuir isotherm with high adsorption capacity of 116.0 ± 3.61 mg g À1 . The desorption experiments revealed that adsorption capacities of MAC still viable after three adsorption-desorption cycles. It was observed that chemical affinity of small concentrations of methanol with phenol allowed to exert greater desorption capacity to other solvents with permanence of adsorbed phenol of 17.5 mg g À1 .

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Nano γ-Fe2O3/bentonite magnetic composites: Synthesis, characterization and application as adsorbents

Cited by 49 publications

References 33 publications

Synergistic effect of nano‐bentonite and nanocadmium oxide doping concentrations on assembly, characterization, and enhanced gamma‐rays shielding properties of polypropylene ternary nanocomposites

Synergistic effect of nano‐bentonite and nanocadmium oxide doping concentrations on assembly, characterization, and enhanced gamma‐rays shielding properties of polypropylene ternary nanocomposites

Synthesis and Characteristics of the Magnetic Properties of Fe3o4 – (Ctab-Montmorillonite) Composites Based on Variation in Fe3+/Fe2+Concentrations

Assessment of the adsorption capacity of phenol on magnetic activated carbon

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