A clean approach for functionalized carbon nanotubes by deep eutectic solvents and their performance in the adsorption of methyl orange from aqueous solution

Ibrahim, Rusul Khaleel; El-Shafie, Ahmed; Hin, Lai Sai; Mohd, Nuruol Syuhadaa; Aljumaily, Mustafa Mohammed; Ibraim, Shaliza; AlSaadi, Mohammed Abdulhakim

doi:10.1016/j.jenvman.2019.01.070

Cited by 69 publications

(20 citation statements)

References 79 publications

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“…Recently, various materials have been used with DES to synthesize different composites for the removal of various pollutants in aqueous solution [11][12][13]. In addition, many studies have shown the possibility and efficiency of using DESs as functionalization agents to modify carbon nanotubes nanostructure [14,15], graphene, and graphene oxide [16,17], and Carbon Monoliths [18]. Recently also, the impregnation of activated carbon (which has shown great potential for the removal of different types of pollutants) with DES and other chemicals has resulted in control of the pore size and pore surface chemistry of the resulting carbon and a higher amount of pollutant removal.…”

Section: Introductionmentioning

confidence: 99%

Innovative Activated Carbon Based on Deep Eutectic Solvents (DES) and H3PO4

Pam

2019

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In this present work, a novel method for synthesis of palm kernel shell activated carbon was established using DES (choline chloride/urea)/H3PO4 as the activating agent. The pore characterization, morphology, and adsorption properties of the activated carbons were investigated. The activated carbon samples made from the same feedstock at two pyrolysis temperatures (500 and 600 °C) were compared for their ability to adsorb Pb(II) in aqueous solution. The results demonstrated that the production of the activated carbon and adsorptive properties were significantly influenced by the pyrolysis temperature and the ratio of precursor to activating agent. DES/H3PO4 activated carbon (having surface area 1413 m2/g and total pore volume 0.6181 cm3/g) demonstrated good Pb(II) removal. Although all the tested activated carbon samples adsorbed Pb(II) from aqueous solution, they demonstrated different adsorption capabilities according to their various properties. The pyrolysis temperature, however, showed little influence on the activated carbon adsorption of Pb(II) when compared to the impregnation ratio. Their good desorption performance perhaps resulted from the porous structure.

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Section: Introductionmentioning

confidence: 99%

Innovative Activated Carbon Based on Deep Eutectic Solvents (DES) and H3PO4

Pam

2019

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“…The maximum Langmuir adsorption capacity of methyl orange is 940.14 mg g -1 , which is much higher compared with recent adsorbent materials for methyl orange as listed in Table 3. MgO@C 101.80 [28] MgAl LDHs 443.50 [29] LDHs membrane 702.83 [30] Bentonite 156.30 [31] Polyaniline 75.90 [32] Carbon nanotubes 310.20 [33] CuO 121.95 [34] Adsorption of methylene blue Figure 6A shows the adsorption kinetic for methylene blue by flower-like MgO microspheres at different initial pH values of the solution. The equilibrium adsorption capacity arrives at 242.91, 252.47, and 306.90 mg g -1 for pH 4, 7 and 10 with a short equilibrium time of 1 h, respectively.…”

Section: Adsorption Of Methyl Orangementioning

confidence: 99%

Growth and Removal Behavior of Magnesium Oxide Microspheres towards Methyl Orange and Methylene Blue in Aqueous Solution

Ahmed¹,

Pan²,

Li³

et al. 2020

Preprint

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The adsorption of dyes from the industrial influent has attracted great interest to overcome water pollution. In this work, we carefully investigated the growth process of hierarchical MgO microspheres and the difference in the corresponding removal behavior towards two dyes: anionic methyl orange and cationic methylene blue. The MgO microspheres were formed by the self-assembly of thin nanosheets following the reaction time and exhibited the maximum removal capacities are 940.14 mg g-1 for methyl orange and 354.00 mg g-1 for methylene blue. The anionic methyl orange and cationic methylene blue adsorption follow the pseudo-second-order kinetic model, Freundlich isothermal model. The difference in the removal behavior towards two dyes is strongly related to the surface charge of MgO and the charge of pollutants. This work will benefit design and improvement in the removal performance of novel porous adsorbents.

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“…The specific surface area of the composite was increased using two different DESs by combining ethylene glycol (EG) with two kinds of ammonium‐based salts to introduce oxygen‐containing groups onto the MWCNTs. A positive relationship between the adsorption capacities of methyl orange (MO) and the specific surface area was observed . In addition, DES solutions with diverse physical properties were effective in enhancing the dispersion of CNTs .…”

Section: Structural Modification and Recombination Of Cnt/graphene‐bamentioning

confidence: 99%

“…A positive relationship between the adsorption capacities of methyl orange (MO) and the specific surface area was observed . In addition, DES solutions with diverse physical properties were effective in enhancing the dispersion of CNTs . The functionalization was easily carried out at a relatively low cost …”

Section: Structural Modification and Recombination Of Cnt/graphene‐bamentioning

confidence: 99%

The Application of Carbon Nanotube/Graphene‐Based Nanomaterials in Wastewater Treatment

Yin

Cui

Chen

et al. 2019

Small

146

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The treatment of organic wastewater is of great significance. Carbon nanotube (CNT)/graphene‐based nanomaterials have great potential as absorbent materials for organic wastewater treatment owing to their high specific surface area, mesoporous structure, tunable surface properties, and high chemical stability; these attributes allow them to endure harsh wastewater conditions, such as acidic, basic, and salty conditions at high concentrations or at high temperatures. Although a substantial amount of work has been reported on the performance of CNT/graphene‐based nanomaterials in organic wastewater systems, engineering challenges still exist for their practical application. Herein, the adsorption mechanism of CNT‐ and graphene‐based nanomaterials is summarized, including the adsorption mechanism of CNTs and graphene at the atomic and molecular levels, their hydrophilic and hydrophobic surface properties, and the structure–property relationship required for adsorption to occur. Second, the structural modification and recombination methods of CNT‐ and graphene‐based adsorbents for various organic wastewater systems are introduced. Third, the engineering challenges, including the molding of macroscopically stable adsorbents, adsorption isotherm models and adsorption kinetic behaviors, and reversible adsorption performance compared to that of activated carbon (AC) are discussed. Finally, cost issues are discussed in light of scalable and practical application of these materials.

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A clean approach for functionalized carbon nanotubes by deep eutectic solvents and their performance in the adsorption of methyl orange from aqueous solution

Cited by 69 publications

References 79 publications

Innovative Activated Carbon Based on Deep Eutectic Solvents (DES) and H3PO4

Innovative Activated Carbon Based on Deep Eutectic Solvents (DES) and H3PO4

Growth and Removal Behavior of Magnesium Oxide Microspheres towards Methyl Orange and Methylene Blue in Aqueous Solution

The Application of Carbon Nanotube/Graphene‐Based Nanomaterials in Wastewater Treatment

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