Synthesis of graphene oxide/magnesium oxide nanocomposites with high-rate adsorption of methylene blue

Heidarizad, Mahdi; Şengör, S. Sevinç

doi:10.1016/j.molliq.2016.09.049

Cited by 132 publications

(45 citation statements)

References 52 publications

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“…below 1000 cm -1 arising from inter-atomic vibrations .The peak at 1632 cm -1 is correspond to Mg-O stretching .The sharp peak observed at 3700 cm -1 on MgO and GO/MgONCs is related to the presence of hydroxyl groups. For MgO NPs ,the hydroxyl group comes from the reaction between the surface of MgO NPs with water vapor in air or defects 16,19 .The intensity of this peak decrease in GO/MgONCs . Fig.2.Shows the infrared spectra of GO the band in the range of 3100-3500 cm correspond to C = O and C = C stretching .The band located at 1391 cm -1 and 1072 cm -1 are assigned to C -OH stretching and C-O -C stretching vibrations mode of sp 2 carbon skeletal ,respectively 16 .…”

Section: Results and Discussion Characterization Of Go Mgo And Go/ Mmentioning

confidence: 99%

“…Magnesium oxide (MgO) with a destructive sorbent, high surface reactivity, high adsorption capacity and ease of production. Recently.MgO nano particles have been used for the removal of dyes, catechol, phenol, fluoride, and formaldehyde from wastewater 15,16 .Thus ,considering the synergistic advantage and decoration of MgO NCs over GO platform, GO/MgO nanocomposites can be considered as a potential adsorbent for removal of pollutants. Therefore, the aim of this is investigate the adsorption of orange G dye from its aqueous solutions by GO/MgO NCs .…”

Section: Introductionmentioning

confidence: 99%

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Removal Orange G Dye From Aqueous Solutions Using Graphene Oxide/Magnesium Oxide Nano Composite

AL-Niaimi¹,

Olaiwy²

2019

IJRPC

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Section: Results and Discussion Characterization Of Go Mgo And Go/ Mmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Removal Orange G Dye From Aqueous Solutions Using Graphene Oxide/Magnesium Oxide Nano Composite

AL-Niaimi¹,

Olaiwy²

2019

IJRPC

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“…On the contrast to the monolayer adsorption of Langmuir model, the Freundlich model is based on the assumption of multilayer adsorption, 41 described as:…”

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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“…The synthesis of magnesium oxide (MgO)-GO nanocomposites with high-rate adsorption of methylene blue was reported by Heidarizad and Şengör, and they concluded that the high adsorption capacity of MgO-GO nanocomposites makes it a promising adsorbent for water and wastewater treatment [3]. The hydrogen adsorption of magnesium-doped GO was studied using the density functional theory calculations [4].…”

Section: Introductionmentioning

confidence: 99%

“…They showed that RGO-ZnPc exhibits much larger NLO absorption coefficient and better optical limiting performance than those of individual GO, ZnPc, and GO-ZnPc hybrid. This is due to the combination of different NLO mechanisms containing the excited state absorption arising from numerous localized sp 2 carbon configurations, two-photon absorption (TPA) from the sp 3 domains, and saturable absorption (SA) from the sp 2 clusters in the RGO moiety, the reverse SA (RSA) originating from the ZnPc moiety, and the contribution of the efficient photo-induced electron transfer or energy transfer process between ZnPc and RGO [5].…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on the structural, linear, and nonlinear optical properties of MgO-doped graphene oxide nanocomposites

Kimiagar

Abrinaei

2017

Nanophotonics

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Magnesium oxide (MgO)-graphene oxide (GO) nanocomposites were prepared by the hydrothermal method at different temperatures. The effect of growth temperature on the structural, linear, and nonlinear optical (NLO) parameters was investigated. The decoration of MgO on GO sheets was confirmed by X-ray diffraction, scanning electron microscopy, Fourier transform infrared, and UV-visible (UV-vis) spectroscopy analyses. The energy band-gaps of MgO-GO nanocomposites were calculated from UV-vis spectrum using Tauc plot. The NLO parameters of MgO-GO nanocomposites were calculated for the first time by the simple Z-scan technique with nanosecond Nd:YAG laser at 532 nm. The nonlinear absorption coefficient β and nonlinear refractive index n 2 for MgO-GO nanocomposites at the laser intensity of 1.1 × 10 8 W/cm 2 were measured to be in the order of 10 −7 cm/W and 10 −12 cm 2 /W, respectively. The third-order NLO susceptibility of MgO-GO nanocomposites was measured in the order of 10 −9 esu. The results showed that MgO-GO structures have negative nonlinearity as well as good nonlinear two-photon absorption at 532 nm. Furthermore, the NLO parameters increased by the enhancement of the growth temperature. As the investigation of new materials plays an important role in the advancement of optoelectronics, MgO-GO nanocomposites possess potential applications in NLO devices.

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Synthesis of graphene oxide/magnesium oxide nanocomposites with high-rate adsorption of methylene blue

Cited by 132 publications

References 52 publications

Removal Orange G Dye From Aqueous Solutions Using Graphene Oxide/Magnesium Oxide Nano Composite

Removal Orange G Dye From Aqueous Solutions Using Graphene Oxide/Magnesium Oxide Nano Composite

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

Effect of temperature on the structural, linear, and nonlinear optical properties of MgO-doped graphene oxide nanocomposites

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