Graphene Oxide–Cellulose Nanowhisker Hydrogel Nanocomposite as a Novel Adsorbent for Methylene Blue

Beyranvand, Narges Safar; Samiey, Babak; Tehrani, Abbas Dadkhah; Soleimani, Khadijeh

doi:10.1021/acs.jced.9b00655

Cited by 32 publications

(14 citation statements)

References 64 publications

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“…In this study, the adsorption process of Cu(II) onto TNP was usually estimated using the pseudo-first-order model (eq ), pseudo-second-order model (eq ), Elovich model (eq ), and the intraparticle diffusion model (eq ). where q t (mg/g) is the adsorption capacity at time t ; k 1 (min) is pseudo-first-order rate constant, k 2 (g/(mg·min)) is pseudo-second-order rate constant; α (mg/(g·min)), β (g/mg) is the rate constant of the Elovich model, and k i (mg·g –1 ·min –1/2 ) is the rate constant of the intraparticle diffusion model.…”

Section: Resultsmentioning

confidence: 99%

Green Synthesis of Tannin-Polyethylenimine Adsorbent for Removal of Cu(II) from Aqueous Solution

et al. 2020

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In this work, the adsorbent based on tannin (TN) and polyethylenimine (PEI) was prepared via a simple and green method (TNP). The characteristics of the TNP were determined using scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy, and the results revealed that TNP was synthesized by TN and PEI, and Cu(II) was combined with the −NH or −OH groups of TNP. The effects of the n (TN) :n (PEI) , adsorbent dosage, pH, time, initial metal concentration, and temperature on the adsorption of Cu(II) were investigated in detail. The adsorption of Cu(II) by TNP was greatly affected by pH, and n (TN) :n (PEI) = 1.5:3 was the optimum mole ratio of raw material to obtain TNP. TNP possessed excellent adsorption properties, and the maximum adsorption capacity of TNP for Cu(II) was 94.5 mg/g at 338.15 K. The adsorption process was in agreement with the Langmuir model and the pseudo-second-order model. Regeneration and reusability of TNP did not decrease significantly after four times of regeneration experiments. The order of competitive ability for the three metal ions was as follows: Pb(II) > Cu(II) > Zn(II). These experimental results suggested that TNP could effectively remove metal ions from aqueous solution. This study is of great significance for environmental protection.

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Section: Resultsmentioning

confidence: 99%

Green Synthesis of Tannin-Polyethylenimine Adsorbent for Removal of Cu(II) from Aqueous Solution

et al. 2020

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“…In another research work, Beyranvand et al produced hydrogel based on CNC/GO hybrid as a new adsorbent for methylene blue. During the preparation, azide-functionalized CNC was synthesized after CNC tosylation [159]. Then CNC-N 3 /GO was obtained via nitrene chemistry [160].…”

Section: Cnc/gomentioning

confidence: 99%

“…Schematic representation of the production procedure, as well as the exhibition of the carboxylate and phenoxide adsorption, GO sites of the hybrids towards methylene blue. Reproduced with permission from Reference[159]. Copyright ©2019, American Chemical Society.…”

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confidence: 99%

Cellulose Nanocrystals/Graphene Hybrids—A Promising New Class of Materials for Advanced Applications

2020

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With the growth of global fossil-based resource consumption and the environmental concern, there is an urgent need to develop sustainable and environmentally friendly materials, which exhibit promising properties and could maintain an acceptable level of performance to substitute the petroleum-based ones. As elite nanomaterials, cellulose nanocrystals (CNC) derived from natural renewable resources, exhibit excellent physicochemical properties, biodegradability and biocompatibility and have attracted tremendous interest nowadays. Their combination with other nanomaterials such as graphene-based materials (GNM) has been revealed to be useful and generated new hybrid materials with fascinating physicochemical characteristics and performances. In this context, the review presented herein describes the quickly growing field of a new emerging generation of CNC/GNM hybrids, with a focus on strategies for their preparation and most relevant achievements. These hybrids showed great promise in a wide range of applications such as separation, energy storage, electronic, optic, biomedical, catalysis and food packaging. Some basic concepts and general background on the preparation of CNC and GNM as well as their key features are provided ahead.

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“…It is, therefore, necessary to remove these toxic pollutants from industrial effluents before discharging to the environment. Dyes are one of the most important groups of the pollutants [3,4] and are usually classified into cationic (basic), anionic (direct, acidic, and reactive), and non-ionic [5,6] types. The annual production of industrial dyes is estimated to be 10,000 tons, of which about 1 to 10 percent of is being discharged to the environment [7].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of methyl violet dye from wastewater using poly(methacrylic acid-co-acrylamide)/bentonite nanocomposite hydrogels

et al. 2022

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One of the major environmental problems is the entry of colored pollutants into the oceans and seas. Adsorption is one of the effective methods to eliminate colorant polluting materials from wastewater streams. In this study, nanocomposite hydrogels of poly(methacrylic acid-co-acrylamide) (Poly(MAA-co-AAm)) containing different weight percent bentonite clay nanoparticles (0, 5, 10, and 15 wt. %) were used to remove methyl violet (MV) dye. FTIR, SEM, TGA, and XRD were used to analyze the properties of adsorbents. Results showed that bentonite nanoparticles were successfully distributed in the hydrogel system. Bentonite nanoparticles at 10 wt. % gave the maximum MV dye adsorption efficiency. The highest adsorption was obtained at a pH of 5, an adsorbent dosage of 1.5 g/L, a temperature of 25°C, a contact time of 60 min, and a pollutant concentration of 10 mg/L. In thermodynamics studies, a negative values of Gibbs free energy (ΔG°) indicating that the adsorption process was spontaneous. In addition, Poly(MAA-co-AAm) hydrogels and Poly(MAA-co-AAm)/bentonite nanocomposite hydrogels gave the adsorption enthalpy (ΔH°) of 22.2 and 47.4 KJ/mol. Langmuir isotherm model was successfully applied in describing the equilibrium behavior of the adsorption process. To investigate the adsorption kinetics, we used pseudofirst-order, pseudo-second-order, and Elovich models. The kinetic study showed that the pseudo-secondorder model was more successful in describing the kinetic behavior of the adsorption process than pseudofirst-order and Elovich models. Incorporating bentonite clay nanoparticles in Poly(MAA-co-AAm) nanocomposite hydrogels significantly improved the adsorption and swelling efficiencies of these hydrogels.

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Graphene Oxide–Cellulose Nanowhisker Hydrogel Nanocomposite as a Novel Adsorbent for Methylene Blue

Cited by 32 publications

References 64 publications

Green Synthesis of Tannin-Polyethylenimine Adsorbent for Removal of Cu(II) from Aqueous Solution

Green Synthesis of Tannin-Polyethylenimine Adsorbent for Removal of Cu(II) from Aqueous Solution

Cellulose Nanocrystals/Graphene Hybrids—A Promising New Class of Materials for Advanced Applications

Adsorption of methyl violet dye from wastewater using poly(methacrylic acid-co-acrylamide)/bentonite nanocomposite hydrogels

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