Graphene oxide/polyacrylonitrile fiber hierarchical-structured membrane for ultra-fast microfiltration of oil-water emulsion

Zhang, Jianqiang; Xue, Qingzhong; Pan, Xin; Jin, Yakang; Lu, Wenbo; Ding, Dandan; Guo, Qikai

doi:10.1016/j.cej.2016.08.124

Cited by 324 publications

(94 citation statements)

References 30 publications

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“…Electrospinning is perhaps one of the most versatile and least expensive techniques for producing composite fibers with very small diameters . Thus, electrospun polyacrylonitrile (PAN) nanofibers have been widely used in many water treatment processes due to their superior thermal, mechanical, and chemical resistance properties . However, pure PAN nanofiber membranes are still not effective in removing heavy metal ions from aqueous solutions .…”

Section: Introductionmentioning

confidence: 99%

Enhancement of heavy metal ion adsorption using electrospun polyacrylonitrile nanofibers loaded with ZnO nanoparticles

Haddad

Alharbi

2018

J of Applied Polymer Sci

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This article describes the adsorption and tensile behavior of electrospun polyacrylonitrile (PAN) nanofiber mats loaded with different amounts of ZnO [0.5, 1.0, 2.0, and 5.0 wt%] nanoparticles. X‐ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transforminfrared (FTIR) spectroscopy, and thermal gravimetric analysis (TGA) were utilized to characterize the resulting composite nanofibers. Microscopic investigations revealed that the increase in surface roughness and diameter of the electrospun PAN nanofibers was due to the addition of ZnO nanoparticles. Adsorption results indicated that the fabricated PAN/ZnO (2.0 wt%) composite nanofiber mats showed the best adsorption performance with 261% and 167% increase in adsorption capacities for Pb(II) and Cd(II) from aqueous solutions, respectively, compared to pristine PAN nanofibers. The adsorption equilibrium was reached within 60 min, and the process could be described using the nonlinear pseudo‐second‐order kinetic model. The adsorption isotherm study was better represented by the Langmuir model, which suggested a homogeneous distribution of the monolayer adsorptive sites on the surface of the composite nanofibers. Mechanical testing revealed that the decrease in tensile strength and elongation at breakof the PAN/ZnO composite nanofiber mats was due to the formation of some bead defects and agglomerates within the structure of the PAN nanofibers. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47209.

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Section: Introductionmentioning

confidence: 99%

Enhancement of heavy metal ion adsorption using electrospun polyacrylonitrile nanofibers loaded with ZnO nanoparticles

Haddad

Alharbi

2018

J of Applied Polymer Sci

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“…Therefore, the elimination of oil spills or organic solvents from the source water is important to environmental protection and energy conservation. Several techniques such as solvent extraction , biodegradation , in situ burning , absorption , membrane processes , and floating booms techniques have been evaluated for the removal of oil spills or organic solvents from water. However, solvent extraction, in situ burning and floating booms techniques have some undesirable sides such as low separation efficiency, high operation costs, and the generation of secondary pollutants, while membrane processes are relatively expensive to install, operate, and prone to fouling, scaling, or membrane degradation .…”

Section: Introductionmentioning

confidence: 99%

Enhancement of oil absorption properties of acrylic ester resin hybridized with well‐organized sea urchin‐like MnO₂

Zhang

Qiu

et al. 2017

Polymer Composites

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Acrylic ester resin (AER) is a promising oil‐absorbing material for oils and organic solvents absorption because it exhibits high oil retention ability, good swelling properties, and reusability while also being inexpensive, large‐scale production, and environmentally benign. However, the AER is not fully utilized owing to its low oil absorption capacity and slow oil absorption rate. In this work, we combine porous structures of MnO2 and swelling properties of AER and design a novel route to fabricate sea urchin‐like MnO2/AER hybrids. In this route, the sea urchin‐like MnO2 was prepared by a facile hydrothermal method in acidic media. The sea urchin‐like MnO2/AER hybrids with different wt% were synthesized by a microwave polymerization route. The resin hybrids exhibited very rough surfaces, which are beneficial for organic molecules absorption and diffusion into the interiors of materials. The resin hybrids can remove oils and organic solvents from water with high selectivity and absorption capacity, and can absorb not only floating oil but also heavy organic solvents underwater. The maximum absorption capacity of resin hybrids was found at the MnO2 content of 3%, and maximum absorption capacity up to 32.5 times of their own weight, higher than that of the pure AER. The performances were mainly attributed to the unique porous structure of MnO2 and swelling properties of AER, indicating the potential application of such oil‐absorbing resins to introduce the porous inorganic materials for developing new oils and organic solvents absorbent for removal of organic pollutants from the wastewater. POLYM. COMPOS., 39:4041–4049, 2018. © 2017 Society of Plastics Engineers

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“…With this aim in mind, many researchers have employed various modifications to change the surface properties of the polymeric membranes, such as surface grafting, blending, surface coating, and surface absorption [13][14][15][16][17][18][19]. Zhang et al [20] fabricated a Graphene oxide modified polyacrylonitrile hierarchical-structured membrane. It was found that this hierarchical-structured membrane exhibited a very high flux, feasible rejection ratio, and superior antifouling performance in separating an oil-water emulsion, due to its surface hydrophilicity.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Fouling-Resistant Nanofibrous Composite Membranes for Separation of Oily Wastewater

2017

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A facile and low-cost method has been developed for separation of oily wastewater. Polyvinylidene fluoride/polyacrylonitrile (PVDF/PAN) nanofibers laminated on a supporting layer were tested. In order to create highly permeable and fouling-resistant membranes, surface modifications of both fibers were conducted. The results of oily wastewater separation showed that, after low vacuum microwave plasma treatment with Argon (Ar) and chemical modification with sodium hydroxide (NaOH), the membranes had excellent hydrophilicity, due to the formation of active carboxylic groups. However, the membrane performance failed during the cleaning procedures. Titanium dioxide (TiO 2 ) was grafted onto the surface of membranes to give them highly permeable and fouling-resistance properties. The results of the self-cleaning experiment indicated that grafting of TiO 2 on the surface of the membranes after their pre-treatment with Ar plasma and NaOH increased the permeability and the anti-fouling properties. A new surface modification method using a combination of plasma and chemical treatment was introduced.

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Graphene oxide/polyacrylonitrile fiber hierarchical-structured membrane for ultra-fast microfiltration of oil-water emulsion

Cited by 324 publications

References 30 publications

Enhancement of heavy metal ion adsorption using electrospun polyacrylonitrile nanofibers loaded with ZnO nanoparticles

Enhancement of heavy metal ion adsorption using electrospun polyacrylonitrile nanofibers loaded with ZnO nanoparticles

Enhancement of oil absorption properties of acrylic ester resin hybridized with well‐organized sea urchin‐like MnO₂

Preparation of Fouling-Resistant Nanofibrous Composite Membranes for Separation of Oily Wastewater

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Graphene oxide/polyacrylonitrile fiber hierarchical-structured membrane for ultra-fast microfiltration of oil-water emulsion

Cited by 324 publications

References 30 publications

Enhancement of heavy metal ion adsorption using electrospun polyacrylonitrile nanofibers loaded with ZnO nanoparticles

Enhancement of heavy metal ion adsorption using electrospun polyacrylonitrile nanofibers loaded with ZnO nanoparticles

Enhancement of oil absorption properties of acrylic ester resin hybridized with well‐organized sea urchin‐like MnO2

Preparation of Fouling-Resistant Nanofibrous Composite Membranes for Separation of Oily Wastewater

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Enhancement of oil absorption properties of acrylic ester resin hybridized with well‐organized sea urchin‐like MnO₂