Synthesis of novel reduced graphene oxide decorated β-cyclodextrin epichlorohydrin composite and its application for Cr(VI) removal: Batch and fixed-bed studies

Rout, Dibya Ranjan; Jena, Hara Mohan

doi:10.1016/j.seppur.2021.119630

Cited by 32 publications

(22 citation statements)

References 68 publications

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“…The absorption tests revealed that, the absorption efficiency of the material for cationic dyes MB and MG is the highest (see Figure 4A,B,F), while the absorption efficiency for the cationic dye BF is relatively lower. This is mainly because in the molecule of BF there are fewer sites available for cation absorption compared to MG 42 . In addition, the steric bulk of BF molecules is larger than that of MB molecules, and there are ‐NH 2 groups, which are mutually repulsive with the ‐NH 2 moieties of acrylamide, in the molecule of BF, thus resulting in a low absorption capacity.…”

Section: Resultsmentioning

confidence: 99%

“…The absorption capacity increases slightly at the pH value of 11. The possible reason being that, anions in the solution combine with the dye molecules and enter the hydrogel through the concentration difference 42 …”

Section: Resultsmentioning

confidence: 99%

“…40,41 The absorption tests revealed that, the absorption efficiency of the material for cationic dyes MB and MG is the highest (see Figure 4A,B,F), while the absorption efficiency for the cationic dye BF is relatively lower. This is mainly because in the molecule of BF there are fewer sites available for cation absorption compared to MG. 42 In addition, the steric bulk of BF molecules is larger than that of MB Because β-CD has a large number of hydroxyl groups, and the hydrophilic hydroxyl group is distributed outside the cyclodextrin. The inside of its cavity is passed through by the polymer chain, resulting in the increase of MB absorption with the increased amount of β-CD.…”

Section: Absorption Testsmentioning

confidence: 99%

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UV‐initiated preparation and absorption properties of pseudo‐polyrotaxane cyclodextrin‐based PVA/poly (acrylamide‐co‐acrylic acid) hydrogel

Simayi,

Jiang,

Sawut

et al. 2023

Polymers for Advanced Techs

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The recycling of dyes from dye wastewater is one of the most challenging problems in wastewater treatment. In this study, a pseudo‐polyrotaxane cyclodextrin based PVA/poly (acrylamide‐co‐acrylic acid) hydrogel was prepared by UV‐initiated polymerization. The network structure of the hydrogel and the performance on the dye absorption were adjusted by controlling the content of cyclodextrin. The study was mainly focused on the absorption of methylene blue (MB) in different environments, selectivity of absorption in mixed solutions and the cyclic absorption behavior. At room temperature, the absorption efficiency of this hydrogel for MB and methylene green reached 91.37% and 94.23%, respectively. In addition, the hydrogel exhibited highly selective absorption towards MB in mixed dye solutions. In the absorption‐desorption cyclic experiments, a more cost‐effective and environmental friendly solvent, a mixture of ethanol and water, was used, and after ten cycles, the highest absorption efficiency was basically maintained. Hence, the hydrogel is expected to be a candidate for more efficient and economical absorbent material in dye wastewater treatment.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Absorption Testsmentioning

confidence: 99%

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UV‐initiated preparation and absorption properties of pseudo‐polyrotaxane cyclodextrin‐based PVA/poly (acrylamide‐co‐acrylic acid) hydrogel

Simayi,

Jiang,

Sawut

et al. 2023

Polymers for Advanced Techs

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“…39 In addition, the rich oxygen located on surfaces and edges (hydroxyl, carboxyl and epoxy), delocalized p-p electrons (due to restored aromaticity) and large surface of RGO enhance intercalation/adsorption of aromatic organic pollutants that can be photocatalytically degraded, particularly in composites with semiconductors. 10,[82][83][84][85] Since oxidation is known to enhance the optical band gap energy (in GO relative to graphene), reduction towards a more graphene-like material (in RGO) infers a lower optical band gap energy. This may be rationalised to mean that RGO would be more appropriate for photocatalysis than GO despite a lower content of oxygen functionalities.…”

Section: Propertiesmentioning

confidence: 99%

Dynamics of reduced graphene oxide: synthesis and structural models

Mombeshora

Muchuweni

2023

RSC Adv.

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“…Transition metal-related oxidative methods have demonstrated increased removal efficiency for the degradation of carcinogenic pollutants into lower molecular weight and reduced toxicity [20][21]. The results of NPs-treated textile wastewater revealed that some major compounds were greatly diminished, bio-transformed, or completely degraded [22][23]. The most effective chemical oxidation approach is an advanced oxidation technology, which is already gaining significant application in the water treatment process [24].…”

Section: Introductionmentioning

confidence: 99%

Single-Step Green Synthesis of Iron Nanoparticles in the Aqueous Phase for Catalytic Application in Degradation of Malachite Green

Rathore¹,

Devra²

2021

Advanced Energy Conversion Materials

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The goal of the research was to devise a simple and environment-friendly approach to synthesize iron nanoparticles (FeNPs) and evaluate the catalytic activity of biosynthesized FeNPs for the degradation of the cationic dye Malachite Green (MG) in the presence of Peroxomonosulphate (PMS). Different instrumental approaches were used to characterize green produced FeNPs, and the results show that the NPs are spherical and 48 nm in size. Increasing the concentrations of nanoparticles (0.5 × 10-8 - 2.0 × 10-8 mol/dm3), Peroxomonosulphate (1.0 × 10-4 - 5.0 × 10-4 mol/dm3), dye (1.0 × 10-5 - 5.0 × 10-5 mol/dm3), pH (5), and high temperature (25-35 °C) enhanced the degradation kinetics of Pseudo-first-order kinetics were used to describe the degradation of MG in the FeNPs/PMS system, and activation parameters were derived. The maximum MG degrading efficiency for the FeNPs/PMS system was 88% in 60 minutes under optimum reaction conditions. The structure of intermediates formed by MG degradation by FeNPs/PMS was determined using UV-vis spectrum analysis. The application of synthesized FeNPs to improve Peroxomonosulphate oxidation potential for MG degradation is a unique, efficient, promising, and eco-friendly technology because it does not require any expensive reagents.

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Synthesis of novel reduced graphene oxide decorated β-cyclodextrin epichlorohydrin composite and its application for Cr(VI) removal: Batch and fixed-bed studies

Cited by 32 publications

References 68 publications

UV‐initiated preparation and absorption properties of pseudo‐polyrotaxane cyclodextrin‐based PVA/poly (acrylamide‐co‐acrylic acid) hydrogel

UV‐initiated preparation and absorption properties of pseudo‐polyrotaxane cyclodextrin‐based PVA/poly (acrylamide‐co‐acrylic acid) hydrogel

Dynamics of reduced graphene oxide: synthesis and structural models

Single-Step Green Synthesis of Iron Nanoparticles in the Aqueous Phase for Catalytic Application in Degradation of Malachite Green

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