Graphene oxide membranes with tunable permeability due to embedded carbon dots

Wang, Wentai; Eftekhari, Ehsan; Zhu, Guangshan; Zhang, Xiwang; Zhang, Yan; Q, Li

doi:10.1039/c4cc05295a

Cited by 152 publications

(95 citation statements)

References 32 publications

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“…From all these observations, it is evident that these types of graphene oxide membranes are suitable candidates for an effective desalination application. Li et al [61] in their recent work reported carbon dots impregnated graphene oxide membrane as an effective tunable permeation system. According to Li et al [61], the purpose of embedding the carbon dots in the interspaces is to tune the spacing and channels that exist between graphene oxide layers.…”

Section: Go Membrane As Ionic and Molecular Sieve In Solutionmentioning

confidence: 98%

“…Li et al [61] in their recent work reported carbon dots impregnated graphene oxide membrane as an effective tunable permeation system. According to Li et al [61], the purpose of embedding the carbon dots in the interspaces is to tune the spacing and channels that exist between graphene oxide layers. Further, Li et al [61] attributed that the compositional similarity between carbon dots and graphene oxide favoured a better distribution of carbon dots than any other nanomaterials on to the graphene oxide and thereby an excellent compatible permeation membrane has emerged.…”

Section: Go Membrane As Ionic and Molecular Sieve In Solutionmentioning

confidence: 98%

“…According to Li et al [61], the purpose of embedding the carbon dots in the interspaces is to tune the spacing and channels that exist between graphene oxide layers. Further, Li et al [61] attributed that the compositional similarity between carbon dots and graphene oxide favoured a better distribution of carbon dots than any other nanomaterials on to the graphene oxide and thereby an excellent compatible permeation membrane has emerged. Results also confirmed that the permeation of the graphene oxide membrane from 18 L h −1 m −2 was increased to a whopping 204 L h −1 m −2 by embedding the carbon dots on to the graphene oxide membrane.…”

Section: Go Membrane As Ionic and Molecular Sieve In Solutionmentioning

confidence: 99%

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Graphene oxide: the new membrane material

Joshi

Alwarappan

Yoshimura

et al. 2015

Applied Materials Today

424

197

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a b s t r a c tA perfect molecular level separating unit for any kind of species to be filtered is on very high demand. In recent years, graphene oxide has emerged as an important material which can filter ions and molecules. This is an emerging field of research which has drawn extensive attention after the work by Nair et al.[1]. Following their work, various research groups started working in this area in last three years. Herein, we briefly review the recent development on graphene oxide membranes. This review is a summary of some very recent results and contributions made so far in this emerging research field. We have discussed recently developed mechanisms and models to understand the transport through GO based membranes. This review begins with a basic background on membrane technology followed by discussion related to developments of carbon materials based membrane technology. At the end we summarize advantages and disadvantages of membranes based on graphene oxide and discuss their future prospective.

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Section: Go Membrane As Ionic and Molecular Sieve In Solutionmentioning

confidence: 98%

Section: Go Membrane As Ionic and Molecular Sieve In Solutionmentioning

confidence: 98%

Section: Go Membrane As Ionic and Molecular Sieve In Solutionmentioning

confidence: 99%

See 1 more Smart Citation

Graphene oxide: the new membrane material

Joshi

Alwarappan

Yoshimura

et al. 2015

Applied Materials Today

424

197

View full text Add to dashboard Cite

show abstract

“…In addition, such an approach does not compromise the rejection efficiency of the membrane for pollutants such as organic dyes. 69,70 In practice, challenges and solutions. Although numerous studies have shown the applicability of this class of membranes for water desalination, in particular as NF membranes, many studies in the literature have addressed current challenges.…”

Section: Multilayer Graphene Desalination Membranesmentioning

confidence: 99%

Graphene membranes for water desalination

2017

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Extensive environmental pollution caused by worldwide industrialization and population growth has led to a water shortage. This problem lowers the quality of human life and wastes a large amount of money worldwide each year due to the related consequences. One main solution for this challenge is water purification. State-of-the-art water purification necessitates the implementation of novel materials and technologies that are cost and energy efficient. In this regard, graphene nanomaterials, with their unique physicochemical properties, are an optimum choice. These materials offer extraordinarily high surface area, mechanical durability, atomic thickness, nanosized pores and reactivity toward polar and non-polar water pollutants. These characteristics impart high selectivity and water permeability, and thus provide excellent water purification efficiency. This review introduces the potential of graphene membranes for water desalination. Although literature reviews have mostly concerned graphene's capability for the adsorption and photocatalysis of water pollutants, updated knowledge related to its sieving properties is quite limited. NPG Asia Materials (2017) 9, e427; doi:10.1038/am.2017.135; published online 25 August 2017 INTRODUCTION Currently,~1.2 billion people around the world are suffering from a shortage of water and its adverse consequences on health, food and energy. 1,2 On one hand, population growth, increased industrialization and greater energy needs and, on the other hand, loss of snowmelt, shrinkage of glaciers and so on will worsen this situation in upcoming years. As estimated by the world water council, the number of affected people will rise to 3.9 billion in the coming decades. 2,3 One of the most promising approaches to alleviate the water shortage, desalination can increase the water supply beyond what is available from the hydrological cycle. 4 Seawater desalination indeed provides an infinite, steady supply of high-quality water that does not harm natural freshwater ecosystems.Seawater comprises a vast supply of water (97.5% of all water on the planet). Thus, the growth of the installation of seawater desalination facilities in the past decade to circumvent water shortage problems in water-stressed countries has progressed quickly. In 2016, the global water production by desalination was estimated to be 38 billion cubic meter per year, that is, two times higher than that in 2008. 5 So far, seawater desalination has been mainly performed via multistage flash distillation and reverse osmosis (RO). 6 Mostly in the arid Persian Gulf countries, desalination plants perform based on heating and then condensing seawater. This kind of desalination plant consumes large amounts of thermal and electric energy, thus emitting greenhouse gases extensively. 7 In addition to this non-economical and non-ecofriendly version of desalination plants, the main type of desalination plants constructed in the past two decades, as well as future planned ones, are based on RO technology (Figure 1). 8

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“…The 2D nanosheets produced through the exfoliation of bulk layered materials can restack to be lamellar membranes, and excellent water permeance and unwanted species rejection can be achieved by tuning the interlayer spacing between contiguous nanosheets . For instance, graphene oxide (GO) based membranes, which were widely investigated as 2D membranes, have shown potential application in water treatment owing to their unique molecule‐sieving performance combined with fast water permeation . Because of the presence of nanocapillary channels, GO lamellar membranes can selectively allow the permeation of water as well as sieving of dye molecules and hydrated ions .…”

Section: Introductionmentioning

confidence: 99%

Highly Stable and Antibacterial Two‐Dimensional Tungsten Disulfide Lamellar Membrane for Water Filtration

et al. 2018

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Two‐dimensional (2D) lamellar membranes consisting of restacked WS2 nanosheets have shown excellent separation properties for water filtration. The stability, antifouling properties, and antibacterial activities of the WS2 laminar membranes were investigated for practical application. We discovered that the separation properties of the WS2 laminar membranes changed slightly after soaking in water for 28 days as well as that of a 45 h‐cross‐flow filtration, demonstrating an extraordinary operational stability of the WS2 laminar membranes. The remarkable stability is related to the dominant van der Waals interactions between WS2 nanosheets. In addition, the WS2 laminar membranes exhibited excellent antibacterial properties against S. aureus and E. coli with antibacterial rates of 91.3 % and 89.7 %, respectively. These properties of the WS2 laminar membranes make them promising candidates for application in water filtration.

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Graphene oxide membranes with tunable permeability due to embedded carbon dots

Abstract: In this communication, we fabricated graphene oxide membranes with tunable permeation by embedding carbon nanodots of controllable sizes.

Cited by 152 publications

References 32 publications

Graphene oxide: the new membrane material

Graphene oxide: the new membrane material

Graphene membranes for water desalination

Highly Stable and Antibacterial Two‐Dimensional Tungsten Disulfide Lamellar Membrane for Water Filtration

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