Development of an auto-phase separable and reusable graphene oxide-potato starch based cross-linked bio-composite adsorbent for removal of methylene blue dye

Bhattacharyya, Amartya; Banerjee, Biplab; Ghorai, Soumitra; Rana, Dipak; Roy, Indranil; Sarkar, Gunjan; Saha, Nayan Ranjan; De, S. S.; Ghosh, Tapas; Sadhukhan, Sourav; Chattopadhyay, Dipankar

doi:10.1016/j.ijbiomac.2018.05.069

Cited by 54 publications

(28 citation statements)

References 48 publications

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“…This d-spacing was owing to the presence of oxygen-containing functional groups that increase the spacing between GO layers. [47] These results showed that the accomplished synthesis of the GO from G by the Hummers method. [48] For the XRD patterns of MB-GO, the comparatively wide diffraction peak centers at 5.17 with 1.70 nm d-spacing.…”

Section: Ftir Analysismentioning

confidence: 98%

Application of graphene‐based adsorbents in the treatment of dye‐contaminated wastewater; kinetic and isotherm studies

Mindivan

Gül

Göktaş

2021

Vinyl Additive Technology

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The adsorption of methylene blue (MB) on graphene‐based adsorbents was tested through the batch experimental method. Two types of graphene‐based adsorbents as graphene oxide (GO) and reduced graphene oxide (RGO) were compared to investigate the best adsorbent for MB removal. So that optimizing the MB removal for the selected type of graphene‐based adsorbent, the diverse experimental factors, as pH (2–10), contact time (0–1440 min), adsorbent dosage (0.5–2 g/L), and initial MB concentration (25–400 mg/L) were analyzed. The conclusions indicated that the MB removal rised with an increase in the initial concentration of the MB and so rises in the amount of adsorbent used and initial pH. Maximum dye removal was calculated as 99.11% at optimal conditions after 240 min. Adsorption data were compiled by the Langmuir isotherm (R2: 0.999) and pseudo‐second‐order kinetic models (R2: 0.999). The Langmuir isotherm model accepted that the homogeneous surface of the GO adsorbent covering with a single layer. And the adsorption energy was calculated as 9.38 kJ mol−1 according to the D‐R model indicating the chemical adsorption occurred. The results show that GO could be utilized for the treatment of dye‐contaminated aqueous solutions effectively.

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Section: Ftir Analysismentioning

confidence: 98%

Application of graphene‐based adsorbents in the treatment of dye‐contaminated wastewater; kinetic and isotherm studies

Mindivan

Gül

Göktaş

2021

Vinyl Additive Technology

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“…al. showed that PS/GO nanocomposite can remove organic dye from aqueous solution and can be used for the decontamination of water [23]. Aqda et.…”

Section: Introductionmentioning

confidence: 99%

Enhanced electrochemical performance of flexible and eco-friendly starch/graphene oxide nanocomposite

Islam

Mollik

2020

Heliyon

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In this work, flexible plasticized starch/graphene oxide (PS/GO) nanocomposites are synthesized by a simple and economic solution cast technique. The structural and surface morphological study of the nanocomposite demonstrates an increased degree of interaction between PS and GO which in turn improves the mechanical strength and thermal stability of the nanocomposite. The influence of GO loading on the capacitive performance of the nanocomposite was evaluated by studying the electrochemical properties. The PS/GO nanocomposite showed an improved capacitive behavior with a specific capacitance of 115 F/g compared to that of pure starch (2.20 F/g) and GO (10.42 F/g) at a current density 0.1 mA/cm 2 . The electrochemical impedance analysis indicates that the incorporation of GO enhances the conductivity of the nanocomposite in the charge transfer resistance at the electrode/electrolyte interface due to the incorporation of GO. The large surface areas provided by the GO sheets allow faster transport of charge carriers into the electrode and improve the electrochemical properties of the PS/GO nanocomposite. Considering the simplicity and effectiveness of the synthesis proses, the result indicates that the PS/GO nanocomposite could be a potential alternative for bio-friendly, flexible energy-storage applications.

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“…Equations, kinetic constants and regression coe cients (R 2 ) for both models are shown in Table 1. The Langmuir isotherm model is based on the assumption that adsorption occurs in a single layer on a homogeneous surface, while the Freundlich isotherm model is based on the assumption that adsorption occurs on a multilayered and heterogeneous surface [20,27]. The results show the Langmuir model is compatible with the experimental isotherm data compared to the Freundlich model (R 2 =0.995 vs. 0.979).…”

Section: ( )mentioning

confidence: 51%

“…HES polymers require crosslinking to improve features like stability and sturdiness. In the literature in recent times, there are very few studies about GO-starch-based composites and some of these examined applications as membrane ltering [18], drug delivery system [19] and adsorption [20,21]. Another study reported a nanocomposite comprising starch, polyacrylamide and poly(2-acrylamido-2-methylpropane sulfonic acid) including GO layers for methylene blue adsorption [22].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Malachite Green from Aqueous Solution Using Hydroxyethyl Starch Hydrogel Improved by Graphene Oxide

et al. 2022

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This study is the rst report of the preparation of hydroxyethyl starch (HES) hydrogels rapidly crosslinked with divinyl sulfone in a single step and single pot. To develop the physical and chemical features of hydrogels, Graphene oxide (GO) nanoparticles were combined with the crosslinked HES. In addition to swelling studies, structural characterization of the samples was conducted with a scanning electron microscope (SEM) and transmission electron microscope (TEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffractometry (XRD), Brunauer-Emmett-Teller (BET) analysis and thermogravimetric analysis (TGA). For the removal of malachite green model dye by GO-HES, the effects of GO content, solution concentration, temperature, contact duration, dosage and pH on varying adsorption features were researched. Additionally, adsorption isotherms, kinetic and thermodynamic systematics were analyzed. The maximum adsorption capacity of GO-HES composite hydrogel was found to be 89.3 mg/g for Langmuir isotherm. The possible adsorption mechanism of the composite hydrogels for malachite green dye involved electrostatic, hydrogen bonding, and π-π interactions. In addition to reasonable cost and simple synthesis method, the prepared composite materials have potential use in wastewater treatment as adsorbents for the removal of dye from aqueous solutions due to e cient adsorption capacity.Hydroxyethyl starch (HES, medium MW), divinyl sulfone (DVS, ≥96%) and graphite were purchased from Sigma-Aldrich chemical company. Malachite green (C.I. 42000) was purchased from Isolab chemicals. InstrumentsA scanning electron microscope (SEM, FEI-QUANTA FEG 250) was used to observe the microstructure of hydrogels. Transmission electron microscopy (TEM) imaging of hydrogels was accomplished using a JEOL TEM-1400-EDX. X-ray diffraction (XRD) studies were carried out with a PANalytical Empyrean device, operating parameters were λ = 1.54056 Å at 45 kV and 40 mA. Fourier-transform infrared (FTIR) spectra were recorded on a Perkin Elmer 100 spectrometer device with ATR in the range of 650 cm −1 -4000 cm −1 . A Perkin Elmer TGA 8000 device (TGA) was employed to analyze thermal degradation of samples, which were heated from 30°C to 900°C under nitrogen ow at heating rate of 10°C/min. The surface areas of the hydrogels were determined by multipoint BET (Quantachrome QuadraSorb SI). UV-VIS absorption spectra were recorded on a T80+UV/VIS Spectrometer, PG Ins. Ltd. Preparations of HES hydrogelA HES solution was prepared by dispersing HES in 0.2 mol/L NaOH at a concentration of 50 mg/L, stirred at 600 rpm at room temperature for 120 min. The preparation of the HES hydrogel was completed in a single main step. For this, 2 ml HES solution had 240 µl DVS added as a cross-linker and mixed homogeneously and then transferred to a straw with 5 mm diameter with the aid of an injector. A few minutes later, gelation occurred. Later, gels were cut to 3 mm in length. After washing several times during one day in distilled water, they were dried at room tempera...

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Development of an auto-phase separable and reusable graphene oxide-potato starch based cross-linked bio-composite adsorbent for removal of methylene blue dye

Cited by 54 publications

References 48 publications

Application of graphene‐based adsorbents in the treatment of dye‐contaminated wastewater; kinetic and isotherm studies

Application of graphene‐based adsorbents in the treatment of dye‐contaminated wastewater; kinetic and isotherm studies

Enhanced electrochemical performance of flexible and eco-friendly starch/graphene oxide nanocomposite

Adsorption of Malachite Green from Aqueous Solution Using Hydroxyethyl Starch Hydrogel Improved by Graphene Oxide

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