Effects of the oxidation degree of graphene oxide on the adsorption of methylene blue

Yan, Han; Xue, Tao; Yang, Zhen; Li, Kun; Yang, Hu; Li, Aimin; Cheng, Rongshi

doi:10.1016/j.jhazmat.2014.01.015

Cited by 311 publications

(190 citation statements)

References 34 publications

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“…It consists of non-specific functional groups (carbonyl, hydroxyl and epoxide) on their surface providing anchor sites for both dye and metal ion complexation 20 . The abundance of the functional groups on the GO surface exhibits a capability of GO for both cationic and anionic pollutants adsorption such as methylene blue 20 , congo red 21 , acridine orange 22 , malachite green 23 , methyl orange 24 , methyl violet, rhodamine B and orange G 25 and lead 26 . However, our review has revealed that no research concerns on the removal of ARS by adsorption using graphene oxide as an adsorbent.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Capacity of The As-Synthetic Graphene Oxide for The Removal of Alizarin Red S Dye from Aqueous Solution

Nuengmatcha¹,

Mahachai²,

Chanthai

2016

Orient. J. Chem

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This research was aimed to study the adsorption of Alizarin Red S (ARS) dye using graphene oxide (GO) as an adsorbent compared with bare graphite powder (BGP). For optimum conditions, the effects of the initial concentration of ARS, solution pH, adsorbent dosage, and contact time were investigated in detail. The optimum conditions for this work were consisted of 350 mg/L initial concentration of ARS with 0.02 mg adsorbent at pH 2.0. The adsorption equilibrium was completely reached within 30 min. The maximum adsorption capacity of GO was 88.50 mg/g which was higher than that of BGP (34.13 mg/g). The adsorption kinetics well fitted using a pseudo second-order kinetic model. The intraparticle diffusion model described that the intraparticle diffusion was not the only rate-limiting step. In thermodynamics diversion, changes in free energy (DG), enthalpy (DH) and entropy (DS) were also evaluated. The overall adsorption process was exothermic and spontaneous in nature. The adsorption isotherms for GO and BGP fit well with the Langmuir and Freundlich models, respectively. It is, therefore, evident that the as-prepared GO can be used as a high potential adsorbent for the anionic dye and it can be reused for fourth time of adsorption.

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Section: Introductionmentioning

confidence: 99%

Adsorption Capacity of The As-Synthetic Graphene Oxide for The Removal of Alizarin Red S Dye from Aqueous Solution

Nuengmatcha¹,

Mahachai²,

Chanthai

2016

Orient. J. Chem

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“…Recently, graphene oxide (GO) was demonstrated to be a candidate carbon-based adsorbent due to having of non-specific functional groups (carbonyl, hydroxyl and epoxide) on its surface, providing anchor sites for both dye and metal ion complexation [41][42][43][44] .The abundance of functional groups on its surface gives GO adsorption capability for dyes such as methylene blue,congo red,sulfamethoxazole, ciprofloxacin,acridine orange,methyl orange,methyl violet, rhodamine B and orange G [45][46][47][48][49][50][51] .However, the removal of malachite green from aqueous solutionby using graphene oxide has not yet been reported inthe literature.…”

mentioning

confidence: 99%

Thermodynamic and kinetic study of the intrinsic adsorption capacity of graphene oxide for malachite green removal from aqueous solution

Nuengmatcha¹,

Mahachai²,

Chanthai³

2014

Orient J Chem

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Graphene oxide (GO) was produced from bare graphite (BGP) material and was used as an intrinsic adsorbent for the removal of malachite green (MG) from aqueous solution. In an optimization study, the effects of the initial concentration of MG, solution pH, adsorbent dosage, contact time and ionic strength were investigated in detail. The water-soluble dye was analyzed at a maximum wavelength of 618 nm. The optimum conditions for MG removal from aqueous solution included a 300 mg/L initial concentration with 0.02 mg adsorbent at pH 5.1, and complete adsorption equilibrium was reached within 40 min. The maximum adsorption capacity of GO for MG was 384.62 mg/g, dramatically higher (over 10 times) than that of BGP (28.73 mg/g).The adsorption process followed pseudo-second-order kinetics. Thermodynamic data demonstrated that dye adsorption onto the GO surface was mainly an exothermic spontaneous reaction. The remarkably different adsorption isotherms for GO and BGP fit well with the Langmuir and Freundlich models, respectively. It is therefore evident that the prepared GO can be used as a highly effective adsorbent for this toxic dye.

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“…Among the various treatment techniques such as biological treatment [4], ozone oxidation [4], catalytic degradation [5], photocatalytic oxidation [6], coagulation and flocculation [3], nanofiltration membrane [7], and unsaturated polyester resins [8], adsorption is the most attractive due to competency for variety of organic dyes, insensitivity to toxic pollutants [9], efficiency for low concentration range [10], easiness of operating, and being economical process [9,[11][12][13][14][15][16][17][18][19][20][21]. Carbon materials in the form of activated carbon are historically dominant for dye decontamination in view of chemical stability, high surface area, and functional active sites [16,20,[22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

“…Carbon materials in the form of activated carbon are historically dominant for dye decontamination in view of chemical stability, high surface area, and functional active sites [16,20,[22][23][24][25][26]. Recently, graphene oxide (GO) produced by soft chemistry techniques arouse as highly efficient [10,15,21,[27][28][29] and low cost carbon nanoadsorbent [11,30] followed by various carbon materials including single/or multiwall carbon nanotubes, since it owns many superior properties such as large theoretical surface area (2630 m 2 /g) [31], mechanical flexibility, high charge carrier mobility, and chemical stability [32]. Apart from high efficiency, simple and economical recollection cannot be overlooked as well, in view of recontamination through introduction of nanohazard after treatment.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Monolith of Graphene/TEMPO-Oxidized Cellulose Nanofiber as Mechanically Robust, Highly Functional, and Recyclable Adsorbent of Methylene Blue Dye

Hussain

Wang

et al. 2018

Journal of Nanomaterials

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Herein we demonstrate first report on fabrication, characterization, and adsorptive appraisal of graphene/cellulose nanofibers (GO/CNFs) monolith for methylene blue (MB) dye. Series of hybrid monolith (GO/CNFs) were assembled via urea assisted selfassembly method. Hybrid materials were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction patterns, Raman spectroscopy, elemental analysis, thermogravimetric curve analysis, specific surface area, surface charge density measurement, and compressional mechanical analysis. It was proposed that strong chemical interaction (mainly hydrogen bonding) was responsible for the formation of hybrid assembly. GO/CNFs monolith showed mechanically robust architecture with tunable pore structure and surface properties. GO/CNFs adsorbent could completely remove trace to moderate concentrations of MB dye and follow pseudo-second-order kinetics model. Adsorption isotherm behaviors were found in the following order: Langmuir isotherm > Freundlich isotherm > Temkin isotherm model. Maximum adsorption capacity of 227.27 mg g −1 was achieved which is much higher than reported graphene based monoliths and magnetic adsorbent. Incorporation of nanocellulose follows exponential relationship with dye uptake capacities. High surface charge density and specific surface area were main dye adsorptive mechanism. Regeneration and recycling efficiency was achieved up to four consecutive cycles with costeffective recollection and zero recontamination of treated water.

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Effects of the oxidation degree of graphene oxide on the adsorption of methylene blue

Cited by 311 publications

References 34 publications

Adsorption Capacity of The As-Synthetic Graphene Oxide for The Removal of Alizarin Red S Dye from Aqueous Solution

Adsorption Capacity of The As-Synthetic Graphene Oxide for The Removal of Alizarin Red S Dye from Aqueous Solution

Thermodynamic and kinetic study of the intrinsic adsorption capacity of graphene oxide for malachite green removal from aqueous solution

Hybrid Monolith of Graphene/TEMPO-Oxidized Cellulose Nanofiber as Mechanically Robust, Highly Functional, and Recyclable Adsorbent of Methylene Blue Dye

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