Fe–Ni Nanoparticles supported on carbon nanotube-co-cyclodextrin polyurethanes for the removal of trichloroethylene in water

Krause, Rui W. M.; Mamba, Bhekie B.; Dlamini, Langelihle Nsikayezwe; Durbach, Shane H.

doi:10.1007/s11051-009-9659-1

Cited by 30 publications

(14 citation statements)

References 17 publications

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“…The condensation polymerization reactions consisting of these consecutive steps continue until β‐CD polyurethane with a high molecular weight is produced. The temperature and stoichiometric ratio of the substrate and cross‐linker type considered the most important parameters affecting the polymerization reaction .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of β‐Cyclodextrin Nanosponge and Its Application for the Removal of p‐Nitrophenol from Water

Salgın

Vatansever

2017

CLEAN Soil Air Water

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Synthesis and Characterization of b-CyclodextrinNanosponge and Its Application for the Removal of p-Nitrophenol from Water b-Cyclodextrin (b-CD)-based nanosponges (NSs) were synthesized by reacting b-CD with hexamethylenediisocyanate (HMDI) as the cross-linking agent. The effects of the reaction parameters, such as the b-CD/HMDI molar ratio, reaction temperature, and type of cross-linker, on the NS synthesis were systematically examined. The removal of p-nitrophenol (p-NP) from water by NSs was determined through adsorption experiments. The adsorption efficiency of the NSs synthesized at different temperatures did not change significantly, but the adsorption efficiency of the NSs was influenced by the HDMI concentration and cross-linker type. The characteristic Fourier transform infrared (FTIR) bands showed that p-NP was adsorbed parallel to the surface of the NSs. The Langmuir model had the highest correlation coefficient for the adsorption of p-NP onto the NSs. The maximum adsorption capacity (Q°) and adsorption energy (b) for p-NP were estimated to be 1.0 mg g À1 and 1.837 L mg À1 , respectively. The NSs synthesized under the optimum conditions were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and laser diffraction particle size (LDPS) analysis. The combination of the results from SEM, TEM, and LDPS analysis indicated that the synthesized NSs had a porous, sponge-like, and rigid structure. The results of XRD and TGA also revealed the formation of b-CD-NSs.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of β‐Cyclodextrin Nanosponge and Its Application for the Removal of p‐Nitrophenol from Water

Salgın

Vatansever

2017

CLEAN Soil Air Water

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“…Nanomaterials can also be functionalized with various chemical groups to increase their affinity towards the targeted contaminants [34]. Concerns over the discharge of these nanomaterials into the environment prompted us to use N-CNTs as a support for Fe nanoparticles in order to immobilize and reduce their environmental mobility [20]. CDs are slightly soluble in water and this restricts their application in water purification.…”

Section: Ftir Spectroscopy Analysismentioning

confidence: 99%

“…However, because of their solubility in water, CDs cannot be used directly for separation, and hence it seemed plausible that insoluble CDs copolymerized with carbon nanotubes (CNTs) would be good candidates for a recyclable adsorbent [19], which can selectively bind to BPA in water. When CNTs (1-5%) were copolymerized with CDs polymer the recyclability improved considerably, losing only 10% of the polymer mass over twenty-five cycles, compared to 50% loss over nine cycles for the natural CD polymers [20]. In order to further tune CNTs, nitrogen doping is necessary.…”

Section: Introductionmentioning

confidence: 99%

Kinetics, Equilibrium, and Thermodynamics of the Sorption of Bisphenol A onto N‐CNTs‐β‐Cyclodextrin and Fe/N‐CNTs‐β‐Cyclodextrin Nanocomposites

Mphahlele

Mhlanga

2015

Journal of Nanomaterials

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We analysed the adsorptive behaviour of Fe/N-CNTs--CD nanocomposite in the removal of bisphenol A (BPA) from aqueous solution and identified the key influencing parameters. The Fe/N-CNTs--CD nanocomposite adsorbent was prepared by dispersing Fe uniformly on N-CNTs--CD using a microwave polyol method and characterized using Fourier transform infrared spectroscopy (FTIR), focused ion beam scanning electron microscopy (FIB-SEM), and energy-dispersive X-ray spectroscopy (EDS). The solution pH and temperature had minimal effect on sorption of BPA while the initial concentration and adsorbent mass affected the adsorption of BPA. No leaching of Fe into the water was observed; thus the nanocomposites were found suitable for use in water purification. From equilibrium isotherm studies, the Langmuir isotherm model gave the best description of the experimental data. The Langmuir monolayer adsorption capacities of BPA onto N-CNTs--CD and Fe/N-CNTs--CD are 38.20 mg⋅g −1 and 80.65 mg⋅g −1 at 298 K, respectively. Evidently, these adsorption capacity values gave an indication that uniform dispersion of Fe N-CNTs--CD prepared by the microwave polyol method enhances the adsorption of BPA. Meanwhile, the sorption kinetics of BPA onto Fe/N-CNTs--CD were best described by the pseudo-second-order model.

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“…4,5 Compared to common ironbased nanoparticles, bimetallic systems exhibit better performance in removing contaminants. [6][7][8][9] The enhanced reactivity of bimetallic nanoparticles is ideal for the e±cient degradation of persistent organic pollutants and many other contaminants that are di±cult to remove. In the typical ironbased bimetallic system, iron acts as a reductant, and the second metal behaves as a catalyst (commonly Pd or Ni).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Ni/Fe Nanoparticles Utilizing PVP–SDS Bound Micelles as a Template to Remove PCB77

Ding

Zhao

et al. 2015

NANO

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In the present study, Ni/Fe nanoparticles were synthesized using bound micelles as a template and 3, 3 0 , 4, 4 0 -tetrachlorobiphenyl (PCB77) as the target contaminant. The dual bound micelles, which are composed of polyvinylpyrrolidone (PVP) and sodium dodecyl sulfate (SDS), were found to be superior to single-component templates for the dispersion of metallic ions and thus directed the synthesis of Ni/Fe nanoparticles with improved properties. After characterization of the di®erent nanoparticles, it was found that the sustained e®ectiveness of PVP-SDS bound micelles a®orded specialized structures with two gradations of Ni/Fe nanoparticles, correlating to more active sites and higher activity. The improved activity of the Ni/Fe nanoparticles was nally exhibited by the higher ratio (99.3% in 72 h) and e±ciency (k obs of 0.0674 h À1 ) of PCB77 removal. Herein, the utilization of PVP-SDS bound micelles is proposed as a template for the improvement of iron-based nanoparticles and correlated research.

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Fe–Ni Nanoparticles supported on carbon nanotube-co-cyclodextrin polyurethanes for the removal of trichloroethylene in water

Cited by 30 publications

References 17 publications

Synthesis and Characterization of β‐Cyclodextrin Nanosponge and Its Application for the Removal of p‐Nitrophenol from Water

Synthesis and Characterization of β‐Cyclodextrin Nanosponge and Its Application for the Removal of p‐Nitrophenol from Water

Kinetics, Equilibrium, and Thermodynamics of the Sorption of Bisphenol A onto N‐CNTs‐β‐Cyclodextrin and Fe/N‐CNTs‐β‐Cyclodextrin Nanocomposites

Synthesis of Ni/Fe Nanoparticles Utilizing PVP–SDS Bound Micelles as a Template to Remove PCB77

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