Synthesis of graphene oxide/polyacrylamide composite membranes for organic dyes/water separation in water purification

Cheng, Mengmeng; Huang, Linjun; Wang, Yanxin; Zhao, Yunchao; Tang, Jianguo; Zhang, Yang; Hedayati, Mohammadhasan; Kipper, Matt J.; Wickramasinghe, S. Ranil

doi:10.1007/s10853-018-2828-9

Cited by 97 publications

(39 citation statements)

References 55 publications

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“…In this work, the film PVA is displayed to have a semicrystalline nature whose peak is at 2θ = 19.25°, which is in accordance with the plane (101) [33]. The semicrystalline nature of polymer film PAM is manifested in the peak broad at 2θ = 21.37° [19,34]. In the case of polymer blend (PAM/ PVA), the reduction in semicrystalline nature of the film is shown by the intensity reduction of semicrystalline peaks and the broadness of peaks which is a sign of the interaction occurring between PAM and PVA.…”

Section: Xrdsupporting

confidence: 63%

“…This results in an intensity increment of absorption [17,18] due to the addition of filler to the polymer which can bring many localized charge carrier levels known as trapping sites. The potential applications of Poly(acrylamide) (PAM) polymer are many including improvement of soil, waste water treatment as well as biomedical applications, and others [19]. The only reports found were the scarce reports about the PAM membrane for supercapacitor applications [20].…”

Section: Introductionmentioning

confidence: 99%

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Structural, thermal, optical and conductive properties of PAM/PVA polymer composite doped with Ag nanoparticles for electrochemical application

Ragab

Rajeh²

2020

J Mater Sci: Mater Electron

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In the present study, the chemical preparation of silver nanoparticles (Ag NPs) solution was achieved by decreasing silver salt via the use of sodium borohydride (NaBH 4). The particles appeared to have a crystalline nature through the XRD study, with a face-centered cubic (FCC) structure. The formation of silver nanoparticles (Ag NPs) was asserted by the UV, XRD and TEM. An absorption peak at around 430 nm was demonstrated through UV-visible spectrum of the aqueous medium which related to of Ag NPs. The solution casting method was used to prepare new nanocomposites films on the bases of polymer blend which related to of PAM-and PVA-doped with different wt% of Ag NPs. Various analytical techniques were used to characterize the prepared films. It was confirmed through the XRD analysis that there existed a complex formation between polymer blend and Ag NPs. A reduction in the value of the optical bandgap was displayed by UV-Vis with an increase in the concentration of Ag NPs. It was shown through the FTIR spectrum that there existed changes in the FTIR spectrum with dopant concentration indicating the interaction of dopant with the polymer blend. A great improvement in the thermal stability of the composites was proved through the TGA study with the loading of Ag NPs. The ionic conductivity at room temperature was improved by the doping of Ag NPs ions into the polymer blend system. This is attributed to the increase in mobile charge carriers and their mobility. The dielectric values in the studied frequency range indicate a strong dielectric dispersion which increases as the content of the Ag NPs increases. Consequently, these films can be suggested as a suitable application in optical devices and dielectric applications due to the observed improvement in optical properties and ac conductivity.

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Section: Xrdsupporting

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Structural, thermal, optical and conductive properties of PAM/PVA polymer composite doped with Ag nanoparticles for electrochemical application

Ragab

Rajeh²

2020

J Mater Sci: Mater Electron

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“…Wastewater containing organic dyes must be treated before being released, due to the stability and toxicity of dyes [6]. Nanofiltration (NF), one type of pressure driven membrane technology, is a promising strategy for addressing this problem [7]. A suitable membrane material for nanofiltration must have excellent mechanical properties, good permeability, high selectivity for some organic dye molecules, and chemical stability [8].…”

Section: Introductionmentioning

confidence: 99%

“…In our previous work, graphene-based hybrid materials, such as GO/rare-earth materials [14], graphene/silver hybrid membranes [28], GO/polyacrylamide composite membranes [7], and graphenegold nanoparticles membranes [30], have been reported. We have investigated the influence of the amount of AgNPs on membrane nanofiltration performance [28].…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide Nanofiltration Membranes Containing Silver Nanoparticles: Tuning Separation Efficiency via Nanoparticle Size

Yang¹,

Huang²,

Wang³

et al. 2020

Nanomaterials

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Three types of graphene oxide/silver nanoparticles (GO/AgNPs) composite membranes were prepared to investigate size-effect of AgNPs on nanofiltration ability. The size of AgNPs was 8, 20, and 33 nm, which was characterized by UV-visible spectroscopy and transmission electron microscopy. The morphology and structure of GO and GO/AgNPs composite membranes were characterized by atomic force microscopy, scanning electron microscopy, and X-ray diffraction. The filtration performance of membranes were evaluated on a dead-end filtration device. When the size of AgNPs is 20 nm, the GO/AgNPs composite membrane has the highest water flux (106.1 L m−2 h−1 bar−1) and rejection of Rhodamine B (RhB) (97.73%) among three types of composite membranes. The effect of feed concentration of dye solution and the flux of common solvent was also investigated. The mechanism was discussed, which demonstrated that both interlaying spacing and defect size influence the filtration ability of membrane, which is instructive to future study.

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“…In our previous work, we have reported graphene-based hybrid materials such as GO/rare-earth materials [ 21 ], graphene/silver hybrid membranes [ 22 ], GO/polyacrylamide composite membranes [ 23 ] and EO-gold nanoparticles membranes [ 24 ], and discussed their application in water purification. In this paper, EG was grafted onto the surface of GO, altering the distance between layers of GO to achieve improvements in both water permeance and solute rejection of GO membranes.…”

Section: Introductionmentioning

confidence: 99%

The Preparation and Study of Ethylene Glycol-Modified Graphene Oxide Membranes for Water Purification

et al. 2019

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In this work, graphene oxide (GO)/ethylene glycol (EG) membranes were designed by a vacuum filtration method for molecular separation and water purification. The composite membranes were characterized by scanning electron microscopy (SEM), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). The interlayer spacing of GO membranes (0.825 nm) and GO/EG membranes (0.634 nm) are measured by X-ray diffraction (XRD). Using the vacuum filtration method, the membrane thickness can be controlled by selecting the volume of the solution from which the membrane is prepared, to achieve high water permeance and high rejection of Rhodamine B (RhB). The membrane performance was evaluated on a dead-end filtration device. The water permeance and rejection of RhB of the membranes are 103.35 L m−2 h−1 bar−1 and 94.56% (GO), 58.17 L m−2 h−1 bar−1 and 97.13% (GO/EG), respectively. The permeability of GO/EG membrane is about 40 × 10−6 L m-1 h−1 bar−1. Compared with the GO membrane, the GO/EG membrane has better separation performance because of its proper interlayer spacing. In this study, the highest rejection of RhB (99.92%) is achieved. The GO/EG membranes have potential applications in the fields of molecular separation and water purification.

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Synthesis of graphene oxide/polyacrylamide composite membranes for organic dyes/water separation in water purification

Cited by 97 publications

References 55 publications

Structural, thermal, optical and conductive properties of PAM/PVA polymer composite doped with Ag nanoparticles for electrochemical application

Structural, thermal, optical and conductive properties of PAM/PVA polymer composite doped with Ag nanoparticles for electrochemical application

Graphene Oxide Nanofiltration Membranes Containing Silver Nanoparticles: Tuning Separation Efficiency via Nanoparticle Size

The Preparation and Study of Ethylene Glycol-Modified Graphene Oxide Membranes for Water Purification

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