Removal of methylene blue from aqueous solution with magnetite loaded multi-wall carbon nanotube: Kinetic, isotherm and mechanism analysis

Ai, Lunhong; Zhang, Chunying; Liao, Fang; Wang, Yao; Li, Ming; Meng, Lanying; Jiang, Jing

doi:10.1016/j.jhazmat.2011.10.041

Cited by 679 publications

(301 citation statements)

References 52 publications

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“…This phenomenon can be explained by the fact that at higher pH values, the surface of GO/Co 3 O 4 may become negatively charged, which can attract positively charged MB cations through electrostatic forces. A similar trend was observed for the adsorption of methylene blue onto magnetic cyclodextrin/graphene oxide, 15 or polydopamine microspheres, 47 magnetite-loaded multi-walled carbon nanotubes, 51 and magnetic graphene oxide. …”

Section: Effect Of Phsupporting

confidence: 79%

Graphene Oxide/Co3O4 Nanocomposite: Synthesis, Characterization, and Its Adsorption Capacity for the Removal of Organic Dye Pollutants from Water

Pourzare

Farhadi

Mansourpanah

2017

ACSi

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In this work, graphene oxide/Co 3 O 4 nanocomposite was synthesized via hydrothermal decomposition of [Co(en) 3 ] (NO 3 ) 3 complex onto graphene oxide nanosheets. The as-prepared nanocomposite (denoted as GO/Co 3 O 4 ) was structurally characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopies (TEM and SEM), energy dispersive X-ray (EDX) spectroscopy, magnetic measurements, and N 2 adsorption-desorption analysis. The results demonstrated successful immobilization of Co 3 O 4 nanoparticles with an average diameter size of around 12.5 nm on the surface of graphene oxide nanosheets. The adsorption performance of GO/Co 3 O 4 nanocomposite was investigated towards different organic dyes in aqueous solutions. The results displayed that the adsorption rate of the GO/Co 3 O 4 nanocomposite was 98% for methylene blue (MB) in 12 min, and 66% and 45% for Rhodamine B (RhB) and methyl orange (MO) in 40 min, respectively. The effects of various important parameters including adsorbent dosage, contact time, pH, and temperature on the adsorption process were investigated in detail. The equilibrium adsorption data were better fitted by Langmuir isotherm. Adsorption kinetics is well-modeled using pseudo-second-order model. Different thermodynamic parameters indicated that the adsorption process was physisorption and spontaneous. The findings of the present work highlighted facile fabrication of GO/Co 3 O 4 and its application for rapid and efficient removal of MB from wastewater.

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Section: Effect Of Phsupporting

confidence: 79%

Graphene Oxide/Co3O4 Nanocomposite: Synthesis, Characterization, and Its Adsorption Capacity for the Removal of Organic Dye Pollutants from Water

Pourzare

Farhadi

Mansourpanah

2017

ACSi

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“…It was found that the AC shows much higher adsorption rate than that of other adsorbents (Crini 2006). This may be its desirable microporous structure, p-p stacking interaction effect (Dogan et al 2009) or electrostatic attraction (Ai et al 2011), particularly for adsorption of the compatible molecule of IL with aromatic ring (Ghaedi et al 2014).…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Role of tailored surface of activated carbon for adsorption of ionic liquids for environmental remediation

Hassan

Yasin

2014

Int. J. Environ. Sci. Technol.

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The surface of activated carbon (AC) was oxidized using different oxidizing agents (nitric acid and sodium hypochlorite). This modified AC (mAC) was used for the adsorption of ionic liquids (ILs). These mACs were characterized before and after adsorption of ILs using different techniques. The surface area of AC decreased after oxidation, but total acidity increased as compared to untreated AC. The pH of point zero charge of ACs was also decreased after oxidation. The role of adsorbents and its interaction with ILs have been investigated using batch adsorption experiments. Both the alkyl chain length and cation type of ILs affected their adsorption onto ACs; long alkyl chain showed higher adsorption. The pH study showed higher adsorption at higher pH as compared to lower pH value. The pseudo-second-order model was best fitted to the kinetic adsorption data, and Langmuir isotherm model was best fitted on isotherm data. The overall adsorption process was controlled by intra-particle diffusion and external mass transfer. The adsorption results obtained in this study showed comparably higher value with published literature.

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“…Surface modification has been widely used as a feasible solution to overcome the limitations. Different coating layers for magnetite nanoparticles have been successfully applied for the purpose, including 3−glycidoxypropyltrimethoxisilane [22], multi-wall carbon nanotubes [23], methylene blue [24] and silica [17]. Silica appears to be the most promising coating layers from the viewpoint of its reliable chemical stability, high surface area and facile surface modification [25].…”

Section: Introductionmentioning

confidence: 99%

Silica-coated magnetite nanoparticles prepared by the one-step electrochemical method for dye removal

Setyawan

Widiyastuti

Mahmudi

et al. 2018

J. Pow. Tech. Adv. Funct. Mater.

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Abstract:In this paper, the synthesis of silica-coated magnetite nanoparticles using a one-step electrochemical method and their application for dye removal are presented. In this method, pure iron in a dilute aqueous sodium silicate solution that served as a silica precursor was electro-oxidized. The silica-coated magnetite nanoparticles produced by this method is nearly spherical with the size of approximately 10 nm and follows the spinel structure of Fe3O4. The silica-coated magnetite nanoparticles exhibit nearly superparamagnetic properties and excellent performance to remove methylene blue from wastewater. The adsorption capacity of the nanoparticles was approximately 24.2 mg methylene blue/g adsorbent, which was much higher than that of pure magnetite nanoparticles (1.1 mg methylene blue/g adsorbent). Also, the percentage removal was higher than 90% with the initial concentration of methylene blue up to 40 mg/L. It can be regenerated and reused with an only slight reduction in percentage removal.

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Removal of methylene blue from aqueous solution with magnetite loaded multi-wall carbon nanotube: Kinetic, isotherm and mechanism analysis

Cited by 679 publications

References 52 publications

Graphene Oxide/Co3O4 Nanocomposite: Synthesis, Characterization, and Its Adsorption Capacity for the Removal of Organic Dye Pollutants from Water

Graphene Oxide/Co3O4 Nanocomposite: Synthesis, Characterization, and Its Adsorption Capacity for the Removal of Organic Dye Pollutants from Water

Role of tailored surface of activated carbon for adsorption of ionic liquids for environmental remediation

Silica-coated magnetite nanoparticles prepared by the one-step electrochemical method for dye removal

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