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

Yang, Kun; Huang, Linjun; Wang, Yanxin; Du, Yingchen; Zhang, Zhijie; Kipper, Matt J.; Belfiore, Laurence A.; Tang, Jianguo

doi:10.3390/nano10030454

Cited by 34 publications

(11 citation statements)

References 36 publications

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“…These particular features make them promising as nanofiltration (NF) membranes for ultra-selective separation [ 12 , 13 , 14 , 15 , 16 , 17 ] and water desalination [ 18 , 19 , 20 , 21 ], and also in tubular supports [ 22 , 23 ]. GO membranes are also renowned for their antifouling properties [ 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide Membranes for Trace Hydrocarbon Contaminant Removal from Aqueous Solution

et al. 2020

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The aim of this paper is to shed light on the application of graphene oxide (GO) membranes for the selective removal of benzene, toluene, and xylene (BTX) from wastewater. These molecules are present in traces in the water produced from oil and gas plants and are treated now with complex filtration systems. GO membranes are obtained by a simple, fast, and scalable method. The focus of this work is to prove the possibility of employing GO membranes for the filtration of organic contaminants present in traces in oil and gas wastewater, which has never been reported. The stability of GO membranes is analyzed in water solutions with different pH and salinity. Details of the membrane preparation are provided, resulting in a crucial step to achieve a good filtration performance. Material characterization techniques such as electron microscopy, x-ray diffraction, and infrared spectroscopy are employed to study the physical and chemical structure of GO membranes, while gas chromatography, UV-visible spectroscopy, and gravimetric techniques allow the quantification of their filtration performance. An impressive rejection of about 90% was achieved for 1 ppm of toluene and other pollutants in water, demonstrating the excellent performance of GO membranes in the oil and gas field.

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Section: Introductionmentioning

confidence: 99%

Graphene Oxide Membranes for Trace Hydrocarbon Contaminant Removal from Aqueous Solution

et al. 2020

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“…6d and Table S2. Except the exciting rejection rate, the ZnO/rGO membranes exhibit much higher water permeance than those of the GO-based membranes reported so far (generally less than 80 L m − 2 h − 1 bar − 1 ) [41][42][43][44][45][46][47][48][49][50][51].…”

Section: Resultsmentioning

confidence: 99%

General Synthesis of Ultrafine Metal Oxide/Reduced Graphene Oxide Nanocomposites for Ultrahigh-Flux Nanofiltration Membrane

Zhang¹,

Xu²,

Xie³

et al. 2021

Preprint

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Graphene-based membranes have great potential to revolutionize nanofiltration technology, but achieving high solute rejections at high water flux remains extremely challenging. Herein, a family of ultrafine metal oxide/reduced graphene oxide (rGO) nanocomposites are synthesized through a heterogenous nucleation and diffusion-controlled growth process for dye nanofiltration. The synthesis is based on the utilization of oxygen functional groups on GO surface as preferential active sites for heterogeneous nucleation, leading to the formation of sub-3nm size, monodispersing as well as high-density loading of metal oxide nanoparticles. The anchored ultrafine nanoparticles could inhibit the wrinkling of the rGO nanosheet, forming highly stable colloidal solutions for solution-processing fabrication of nanofiltration membranes. By functioning as pillars, the nanoparticles remarkably increase both vertical interlayer spacing and lateral tortuous paths of the rGO membranes, offering an unprecedented water permeability of 225 L m− 2 h− 1 bar − 1 and a high selectivity up to 98% in the size-exclusion separation of methyl blue.

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“…In situ growth It can make MOF uniformly dispersed on the GO surface, and the interaction force between MOF and GO is strong and not easy to be destroyed Not conducive to controlling the size and growth direction of MOF [203][204][205][206][207][208] Mechanical mixing Simple preparation process, requiring only simple mixing GO and MOF are not uniformly combined [209] Hydrothermal method/solvent heat method Simple operation, easy control, reaction in confined space…”

Section: Preparation Methods Advantages Disadvantages Refsmentioning

confidence: 99%

A review of graphene-oxide/metal–organic framework composites materials: characteristics, preparation and applications

Huang

Han

et al. 2021

J Porous Mater

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Graphene-oxide (GO) is an oxidized derivative of graphene. GO has a large number of oxygen-containing functional groups, including hydroxyl, carboxyl, and epoxy groups. The introduction of these groups makes its physical and chemical properties more complicated. For example, although GO films are impermeable to other liquids and even gases, they exhibit abnormally high permeance of water through the GO film. As a three-dimensional hollow material, metal-organic frameworks (MOFs) have a very large specific surface area and pore volume, and have a wide range of applications in catalysis, adsorption, and separations. Combining GO with MOFs can alter the distance between the layers of the GO to affect the transport and screening of specific molecules. This gives composites many potential applications in areas such as gas treatment and water treatment. This review summarizes the current status of GO/MOF composites, expanding on the following aspects: (1) We begin by reviewing the current status of research on GO and MOF with a focus on the physical properties. The mechanical strength of single-layer graphene is very weak, and in most solvents, GO spontaneously aggregates and is very difficult to effectively disperse. On the other hand, MOFs have high specific surface area, high crystallinity, and high porosity, but relatively low stability. Their relative instability greatly limited their practical applications. The formation of GO/MOF composites can take advantage of desirable properties of both material types, while improving their physical characteristics.(2) We next review the characteristics, preparation and applications of GO/MOF composites. At present, various GO/MOF composite materials, such as GO/ZIF-8, GO/MOF-5 have been prepared by in-situ synthesis and other methods. They are widely used in gas adsorption and separation, wastewater treatment applications, and molecular sieve applications. (3) We conclude this review by summarizing the opportunities for achieving composites materials with hydrophilic, antifouling, high-throughput, and high-repulsion properties by efficient, controllable, and low-cost methods. As GO/MOF technology improves, we suggest that these versatile materials have additional prospective applications in other areas, including as materials for medical applications.

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

Cited by 34 publications

References 36 publications

Graphene Oxide Membranes for Trace Hydrocarbon Contaminant Removal from Aqueous Solution

Graphene Oxide Membranes for Trace Hydrocarbon Contaminant Removal from Aqueous Solution

General Synthesis of Ultrafine Metal Oxide/Reduced Graphene Oxide Nanocomposites for Ultrahigh-Flux Nanofiltration Membrane

A review of graphene-oxide/metal–organic framework composites materials: characteristics, preparation and applications

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