Natural polysaccharides-modified graphene oxide for adsorption of organic dyes from aqueous solutions

Qi, Yunchuan; Yang, Mingzheng; Xu, Wenhui; He, Sha; Men, Yi

doi:10.1016/j.jcis.2016.09.058

Cited by 265 publications

(82 citation statements)

References 66 publications

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“…GO possesses the higher adsorption capacity [25][26][27], due to their efficient pore size, layered structure, and large specific surface area. Recently, many polymer-GO composites/fiber such as, GO/Co 3 O 4 [28], magnetic cellulose/GO [29], natural polysaccharides-modified GO [30], and magnesium oxide (MgO)-GO composite [31] and cellulose/GO fibers [32] have been investigated for adsorptive removal of dyes from liquid phase. It has been reported that GO has low adsorption capacity (2.47 mg/g) for MV removal [33].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of magnetic iron‐manganese oxide coated graphene oxide and its application for adsorptive removal of basic dyes from aqueous solution: Isotherm, kinetics, and thermodynamic studies

Khan¹,

Shahjahan²,

Khan

2018

Env Prog and Sustain Energy

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Adsorptive removal of cationic dyes such as methyl violet (MV) and methyl green (MG) from aqueous solution using magnetic iron‐manganese oxide coated graphene oxide (IMGO) was examined. The IMGO was characterized using Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X‐ray spectroscopy, X‐ray diffraction (XRD), N2 adsorption–desorption isotherm, and vibrating sample magnetometer. The effect of different process parameters such as contact time, IMGO dose, initial dyes concentration, initial solutions pH, and temperature was investigated. The equilibrium experimental data were fitted with Langmuir, Freundlich, Dubinin–Radushkevich (D‐R), and Temkin isotherm models. The data fitted well with Freundlich isotherm model suggesting multilayer adsorption of dyes onto heterogeneous adsorbent surface. The Langmuir adsorption capacity (Qm, mg/g) of IMGO with MV and MG was 172.96 and 195.64, respectively. The data obeyed the pseudo‐second order kinetic model, and the mechanism of adsorption was controlled by both intra‐particle and liquid film diffusion models. The adsorption process was found to be spontaneous, endothermic, and physical in nature. The dye‐loaded IMGO was regenerated and used for at least four cycles without any substantial loss of its efficacy. The present adsorptive removal studies of MV and MG revealed that IMGO is an effective and efficient adsorbent for the removal of basic dyes from aquatic system. © 2018 American Institute of Chemical Engineers Environ Prog, 38: S214–S229, 2019

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Section: Introductionmentioning

confidence: 99%

Synthesis of magnetic iron‐manganese oxide coated graphene oxide and its application for adsorptive removal of basic dyes from aqueous solution: Isotherm, kinetics, and thermodynamic studies

Khan¹,

Shahjahan²,

Khan

2018

Env Prog and Sustain Energy

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“…The results show that the linear correlation coefficients (R 2 ) are among 0.537 to 0.686, indicating the pseudo-rst order model cannot be used to describe the adsorption process. On the other hand, the pseudo-second order model is generally used to depict the chemisorption process with a ratelimiting step, 39 which can be represented as equation: …”

Section: Adsorption Kineticsmentioning

confidence: 99%

“…The Langmuir model depicts the monolayer adsorption process on a uniform surface with no interaction among the adsorption molecules (dyes). 39 It can be expressed as equation as following:…”

Section: Adsorption Isothermmentioning

confidence: 99%

Solar light assisted green synthesis of photoreduced graphene oxide for the high-efficiency adsorption of anionic dyes

Gong

Qin

et al. 2017

RSC Adv.

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Graphene oxide (GO) with unique physical and chemical properties, such as high specific surface area, chemical stability and environmental friendliness, has been considered as an excellent adsorbent to remove organic dyes from polluted water. However, because of the electrostatic repulsion between the GO and anionic dyes, the adsorption capacity for anionic dyes is undesirable. Here photoreduced GO (PRGO) was prepared by solar light irradiation and used to investigate the adsorption capacity for anionic dyes. The obtained GO and PRGO were characterized by UV-visible absorption, Raman spectroscopy, atomic force microscopy (AFM), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS). The adsorption kinetics and isotherms were evaluated through adsorption experiments of the anionic orange II (OII) dye adsorbed on GO or PRGO. The results revealed that the adsorption was an exothermic process and followed pseudo-second order kinetics.Four more typical anionic dyes, methyl orange (MO), Ponceau S (PS), Azo Rubine (AR), and Trypan Blue (TB), were also used to compare the adsorption capacities between GO and PRGO. It was demonstrated that the adsorption capacity of anionic dyes was significantly enhanced by PRGO, and the maximum enhancement was up to 8 fold. In conclusion, PRGO reduction by solar light irradiation in a green, convenient and cost effective manner, offers promise for the high-efficiency removal of anionic dyes in water treatment.

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“…These high toxicity and carcinogenicity dye waste water seriously affect human beings' health as well as for the environment. At present, many methods are being used for ecological elimination of organic dyes or harmful pollutants in water, such as adsorption and separation, chemical oxidation, and photocatalysis . In contrast with other methods, photocatalysis under the visible or UV light irradiation is a more environment‐friendly and convenient approach to degrade pollutants in wastewater, leading to CO 2 , H 2 O, and other minerals as final products , .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of 2D and 3D Zinc(II) Coordination Polymers with High Photocatalytic Activities for Removal of Methylene Blue Dye

Zhou

et al. 2018

Zeitschrift anorg allge chemie

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Two zinc(II) coordination polymers (CPs) {[Zn2(L)(MIPA)2]·2H2O}n (1) and {[Zn(L)(H2FA)]·2H2O}n (2) were synthesized via hydrothermal reaction by employment the 5‐methylisophthalic acid (H2MIPA) or 4,4‐(hexafluoroisopropylidene)diphthalic acid (H4FA) and the flexible ligand 1,6‐bis(2‐methylbenzimidazol‐1‐yl)hexane (L). The CPs were characterized by physicochemical and spectroscopic methods as well as by single‐crystal X‐ray diffraction analysis. CP 1 possesses a rare 3D threefold interpenetration framework with coe topology, CP 2 displays a 2D corrugated network with a sql network with point symbol of (44·62). Both CPs exhibited high activities for the photocatalytic degradation of methylene blue in water. The photocatalytic mechanism was also investigated.

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Natural polysaccharides-modified graphene oxide for adsorption of organic dyes from aqueous solutions

Cited by 265 publications

References 66 publications

Synthesis of magnetic iron‐manganese oxide coated graphene oxide and its application for adsorptive removal of basic dyes from aqueous solution: Isotherm, kinetics, and thermodynamic studies

Synthesis of magnetic iron‐manganese oxide coated graphene oxide and its application for adsorptive removal of basic dyes from aqueous solution: Isotherm, kinetics, and thermodynamic studies

Solar light assisted green synthesis of photoreduced graphene oxide for the high-efficiency adsorption of anionic dyes

Synthesis and Characterization of 2D and 3D Zinc(II) Coordination Polymers with High Photocatalytic Activities for Removal of Methylene Blue Dye

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