Graphene nanosheets as novel adsorbents in adsorption, preconcentration and removal of gases, organic compounds and metal ions

Yu, Jingang; Yu, Lin-Yan; Ye, Hua; Liu, Qi; Chen, Xiaohong; Jiang, Xinyu; Chen, Xiaoqing; Jiao, Feipeng

doi:10.1016/j.scitotenv.2014.08.077

Cited by 204 publications

(45 citation statements)

References 167 publications

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“…The researchers are exploring a number of remediation materials which includes agricultural waste, biopolymers, carbon nanotubes, graphene, metal oxides, biochar, etc. [8][9][10][11][12][13][14]. The advanced nanocomposites play a vital role in the environmental protection due to their specificity, selectivity, and a wide range of usability [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

A multifunctional nanocomposite pectin thorium(IV) tungstomolybdate for heavy metal separation and photoremediation of malachite green

Sharma

Naushad

Pathania

et al. 2015

Desalination and Water Treatment

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A B S T R A C TThe nanocomposite pectin thorium(IV) tungstomolybdate (Pc/TWM) has been prepared by incorporating pectin biopolymer within thorium(IV) tungstomolybdate, precipitated at 80˚C. The synthesized nanocomposite material was characterized using scanning transmission electron microscopy, transmission electron microscopy, scanning electron microscopy, X-ray diffraction analysis, and Fourier transform infrared spectroscopy. The binary mixture separations of heavy metal ions have been performed proficiently on the columns of Pc/TWM. The synthesized nanocomposite was exploited for removal of malachite green from the aqueous system under two set of conditions. The synergistic/adsorptional photocatalysis conditions were found to be more efficient than equilibrium adsorption followed by photocatalysis in the dark. The Pc/TWM also showed promising antibacterial activity against the bacteria, Staphylococcus aureus. Thus, the nanocomposite material can be used as an adsorbent for the remediation of harmful metals and dye pollutants from wastewater.

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Section: Introductionmentioning

confidence: 99%

A multifunctional nanocomposite pectin thorium(IV) tungstomolybdate for heavy metal separation and photoremediation of malachite green

Sharma

Naushad

Pathania

et al. 2015

Desalination and Water Treatment

View full text Add to dashboard Cite

show abstract

“…In the past a few years, graphene oxide (GO) and graphene nanosheets have attracted tremendous interest in various applications such as photocatalysts, batteries, supercapacitors, sensors, pharmaceutical and environmental pollution management [4][5][6][7][8][9][10]. GO is an oxidized form of graphene in vigorous oxidation conditions.…”

Section: Introductionmentioning

confidence: 99%

Removal of methylene blue from water by graphene oxide aerogel: thermodynamic, kinetic, and equilibrium modeling

Zamani

Tabrizi

2014

Res Chem Intermed

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Existence of many functional groups on graphene oxide sheets offers potential applications for the removal of environmental pollutants such as heavy metals and dyes. Moreover, materials with aligned porosity in the micrometer range could further enhance the adsorption capability by providing more adsorption sites. In this paper, the performance of graphene oxide aerogel (GOA) prepared by ice segregation induced self-assembly method was investigated as an adsorbent to remove methylene blue (MB) from aqueous solutions. The adsorbent was characterized by XRD, FTIR, TEM, SEM, EDX, and BET. The results showed that GOA has extremely high adsorption capacity for removal of MB. The equilibrium of MB removal process by GOA was well described by the Langmuir isotherm model, with a maximum adsorption capacity of 416.6667 mg g -1 . The results of the thermodynamic investigations indicated that the adsorption reactions were spontaneous (DG°\ 0), endothermic (DH°[ 0) and the adsorption kinetics of MB on GOA was best fitted to the pseudo-second-order model.

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“…Biosorbents, such as chitosan, lignin, activated carbon, bone gelatin, and kenaf [50], attract a strong interest as a more environmental and cost-effective alternative. In addition to biosorbents, carbon nanotubes [51] and graphene [52] are intensively investigated as adsorbent for metal ions and dyes due to their high surface area, high stability, and abundant functional groups on their surfaces [53]. Introduction of magnetic nanoparticles (NPs) onto graphene is expected to combine the high adsorption capacity of graphene and separation convenience of the magnetic materials to make it very interesting.…”

Section: Introductionmentioning

confidence: 99%

Preparation of efficient magnetic biosorbents by clicking carbohydrates onto graphene oxide

Namvari

2015

J Mater Sci

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In this work, hydrophilic graphene nanosheets (GNS) and the related magnetic nanocomposites were prepared by first tethering alkyne-functionalized graphene oxide (GO) with azide-modified glucose followed by deposition of Fe 3 O 4 nanoparticles on the functionalized GNS. For the preparation of nanohybrids, two approaches were designed: in the first one, after chlorination of GO with thionyl chloride, GO was reacted with propargyl alcohol and subsequently clicked with azideglucoside. The resulted sweet GNS were easily dispersed in water and stable for 2 weeks. In the second approach, GO was functionalized with 3,4,5-tris(prop-2-yn-1-yloxy)benzoic acid via hydroxyl groups on its basal plane and finally treated with azide-glucoside. The obtained hydrophilic GNS were stable in water for 3 weeks. The results showed that both glucose-grafted GO sheets were reduced by sodium ascorbate during click-coupling reaction; this is one of the many advantages of click reaction. Finally, Fe 3 O 4 nanoparticles were deposited on the sweet GNS and were superparamagnetic, responded quickly to an external magnetic field and exhibited efficient adsorption towards methylene blue, as a cationic dye. No leaching was observed even after a week of placing a magnet close to the vial containing the dispersion of magnetic sweet GNS.

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Graphene nanosheets as novel adsorbents in adsorption, preconcentration and removal of gases, organic compounds and metal ions

Cited by 204 publications

References 167 publications

A multifunctional nanocomposite pectin thorium(IV) tungstomolybdate for heavy metal separation and photoremediation of malachite green

A multifunctional nanocomposite pectin thorium(IV) tungstomolybdate for heavy metal separation and photoremediation of malachite green

Removal of methylene blue from water by graphene oxide aerogel: thermodynamic, kinetic, and equilibrium modeling

Preparation of efficient magnetic biosorbents by clicking carbohydrates onto graphene oxide

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