High capacity magnetic mesoporous carbon–cobalt composite adsorbents for removal of methylene green from aqueous solutions

Dai, Mingzhi; Vogt, Bryan D.

doi:10.1016/j.jcis.2012.06.062

Cited by 28 publications

(15 citation statements)

References 57 publications

(97 reference statements)

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“…For methylene green (MG), as the surface area of the OPC increases from 500 m 2 /g to 1269, 1508, 2058 and 2455 m 2 /g, Q increases from 0.3 g/g to 0.34, 0.41, 0.43 and 0.436 g/g. This is consistent with previous reports where the adsorpition capacity of MG scales with the surface area [41]. The limited increase in capacity of MG at the higher surface area suggests that the increased surface area in this case is not readily accessible to MG.…”

Section: Dye Adsorption Capacity Of Synthesized Omcssupporting

confidence: 92%

Roll-to-roll fabrication of high surface area mesoporous carbon with process-tunable pore texture for optimization of adsorption capacity of bulky organic dyes

Qiang

Gurkan

et al. 2016

Microporous and Mesoporous Materials

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Large-scale (multigram-to-kilogram) fabrication of soft-templated ordered mesoporous carbons (OMC) is enabled by roll-to-roll (R2R) processing via evaporation induced self assembly of Pluronic F127, oligomeric phenolic resin (resol), and tetraorthosilicate (TEOS) from ethanolic solution. The solution concentration, TEOS loading (etchable for microporous framework), and crosslinking temperature impact the pore structure. Here we demonstrate that mesoporous carbons with surface areas up to 2455 m 2 /g can be obtained under the proper processing conditions. Transmission electron microscopy (TEM), smallangle X-ray scattering (SAXS) and nitrogen adsorption-desorption isotherms reveal (i) supressed framework shrinkage with increasing solution concentration during casting, (ii) improved long range order and higher surface area with increasing TEOS content up to 3:1 TEOS:resol, and (iii) enhanced porosity with crosslinking at 100 ᵒC. These differences can be © 2016. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/ 2 explained on the basis of block copolymer thermodynamics and mechanical reinforcement by silica. This family of OMCs are effective adsorbents for bulky aqueous organic dyes, such as methylene green (MG) and methyl blue (MB), with high adsorption capacities of 0.436 g MG/g OMC and 0.378 g MB/g OMC obtained. This R2R method provides a facile method to generate significant quantities of OMCs with tunable pore textures.

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Section: Dye Adsorption Capacity Of Synthesized Omcssupporting

confidence: 92%

Roll-to-roll fabrication of high surface area mesoporous carbon with process-tunable pore texture for optimization of adsorption capacity of bulky organic dyes

Qiang

Gurkan

et al. 2016

Microporous and Mesoporous Materials

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“…Obtained adsorbents are magnetosusceptible (MSA) [1]. Development of such adsorbents passes extensively [2][3][4][5][6], but industrial production of MSA is still absent. Magnetic sorbents used in petroleum industry are not MSA, because they are macroporous materials, adsorbing oil spills by a mechanism of adhesion and with the help of capillary forces.…”

Section: Introductionmentioning

confidence: 99%

“…Following methods are used for obtaining MSA: -modification of activated carbon by magnetic nanoparticles [2]; -pyrolysis of synthetic polymers with Fe, Ni, Co salts [3,4,5];…”

Section: Introductionmentioning

confidence: 99%

Magneto Susceptible Adsorbents Obtained by Thermochemical Activation of Hydrolytic Lignin With Iron(iii) Hydroxide

Богданович¹,

Arkhilin²,

Menshina³

et al. 2017

ChChT

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Abstract.1 Magnetosusceptible adsorbents (MSA) were obtained by method of thermochemical activation of lignin and precipitated on its surface iron(III) hydroxide. Dependence of magnetic susceptibility and porous structure parameters were investigated. Optimal conditions of synthesis for output parameters in determined interval of factors variation were found. Structural characteristics of MSA were compared with industrial activated carbon BAU-A and OU-B. It was demonstrated that pores volume of MSA does not inferior to values for the activated carbons.

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“…The maximum of adsorbed amount: MCS-2 (159.1 mg/g), MCS-4 (283.2 mg/g), MCS-7 (324.5 mg/g), MCS-10 (86.8 mg/g). In work [13] mesoporous carbon with cobalt nanoparticles was applied for MG colorant adsorption. Carbon material with cobalt had magnetic properties and it was obtained by the soft-templating method.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Methylene Blue and Malachite Green from Aqueous Solutions on Mesoporous Carbon-Nickel and Carbon-Zinc Composites

Jedynak¹

2017

Eng. Prot. Environ.

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Adsorpcja błękitu metylenowego i zieleni malachitowej z roztworów wodnych na mezoporowatych kompozytach węglowo-niklowych i węglowo-cynkowychIn this work adsorption of methylene blue and malachite green on mesoporous carbon-nickel and carbon-zinc composites (ST-A-Ni, ST-A-Ni(NO3)2-imp and ST-A-Zn, ST-A-Zn(NO3)2-imp) were investigated. These materials were obtained by the soft-templating method in presence of various precursors containing nickel or zinc. Nanoparticles of nickel or zinc and solutions of nickel nitrate(V) or zinc nitrate(V) were used as a source of nickel and zinc.Low-temperature nitrogen adsorption isotherms were determined for investigated materials and they were used for porous structure parameters calculation. . Participation of mesoporosity in the total porosity of carbon composites is from approx. 44% to approx. 78%. This means that studied carbons are in fact mesoporous materials, with considerable domination of mesoporosity over the microporosity. The exception is composite ST-A-Zn were the microporosity value is a little bit higher than mesoporosity. The mesopores dimension for the maximum of the distribution function (in the range of mesopores) was determined by Kruk-Jaroniec-Sayari (KJS) method. This dimension was approx. 7 nm for all investigated adsorbents.SEM photos confirmed the presence of ordered mesopores, particularly in materials obtained as a result of zinc nitrate impregnation. Also the presence of nickel nanoparticles, with different dimensions and shapes (ST-A-Ni), was confirmed by SEM photos.The concentrations of adsorbates, before and after adsorption, were determined by spectrophotometric method. Adsorption experiments were carried out at 25°C temperature. The adsorption equilibrium for investigated in this work mesoporous compositions (carbon--metal-composite -colorant solution) was settled after 90 minutes (ST-A-Ni(NO3)2-imp-MB and ST-A-Zn(NO3)2-imp-MB), after 120 minutes (ST-A-Ni-MB), after 240 minutes (ST-A-Ni-MG) and for the rest of investigated compositions after 360 minutes. The studies of adsorption process velocity showed that in most cases adsorption kinetics proceeded according to pseudo II-order reaction model. Only in one case according to pseudo I-order reaction model: for ST-A-Zn (malachite green). Obtained adsorption isotherms were substituted into the Langmuir equation and Freundlich equation. Adsorption process of methylene blue and malachite green on all studied carbon-metal composites proceed in accordance to adsorption model described by Langmuir equation. Adsorption ability of studied mesoporous carbon materials is significantly higher for methylene blue than for malachite green. The best adsorbent for methylene blue was carbon ST-A-Zn(NO3)2-imp (qm = 104.17 mg/g), the worst K. Jedynak 44 adsorbent was carbon ST-A-Zn (qm = 6.65 mg/g). In the case of malachite green the best adsorbent was carbon ST-A-Ni (qm = 58.82 mg/g) and the worst adsorbent was carbon ST-A-Zn (qm = 4.25 mg/g). On the basis of K constant from Langmuir equation the value of free ent...

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High capacity magnetic mesoporous carbon–cobalt composite adsorbents for removal of methylene green from aqueous solutions

Cited by 28 publications

References 57 publications

Roll-to-roll fabrication of high surface area mesoporous carbon with process-tunable pore texture for optimization of adsorption capacity of bulky organic dyes

Roll-to-roll fabrication of high surface area mesoporous carbon with process-tunable pore texture for optimization of adsorption capacity of bulky organic dyes

Magneto Susceptible Adsorbents Obtained by Thermochemical Activation of Hydrolytic Lignin With Iron(iii) Hydroxide

Adsorption of Methylene Blue and Malachite Green from Aqueous Solutions on Mesoporous Carbon-Nickel and Carbon-Zinc Composites

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