Reduced Graphene Oxide Membranes for Ultrafast Organic Solvent Nanofiltration

Huang, Liang; Ji, Chen; Gao, Tiantian; Zhang, Miao; Li, Yingru; Dai, Liming; Qu, Liangti; Shi, Gaoquan

doi:10.1002/adma.201601606

Cited by 379 publications

(283 citation statements)

References 27 publications

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“…59 Notably, the permeability also strongly depends on the thickness of the membrane. Huang et al 60 stated that a thicker graphene membrane can lead to a lower permeability, mainly due to its longer channel tortuosity.…”

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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Section: Multilayer Graphene Desalination Membranesmentioning

confidence: 99%

Graphene membranes for water desalination

2017

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“…However, the usages of GO are much low in our samples, and DY molecular are negatively charged in solution (about -33 mV), the adsorption capacity of TNF-GO films don't increase obviously. For example, when we mixed these film with 100 mL feed solution [50], the adsorption amount of TNF-GO0.5% just increased from 6.3% of control TNF to 8.9% towards DY solutions. Noticeably, the whole retention rates of TNF-GO films increase remarkably.…”

Section: Filtration Performancementioning

confidence: 99%

Processable graphene oxide-embedded titanate nanofiber membranes with improved filtration performance

Wang

et al. 2017

Journal of Hazardous Materials

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Processable graphene oxide-embedded titanate nanofiber membranes with improved filtration performance, Journal of Hazardous Materials http://dx.doi.org/10.1016/j.jhazmat. 2016.11.077 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Highlights Graphene oxide embedded titanate fiber films with good processability are prepared  The content of graphene oxide sheets and thickness of films can be adjusted easily  Embedded graphene oxide sheets improve the filtration property of fibrous films  Such composite films also exhibit enhanced selectivity performance. Abstract 3Graphene oxide (GO)-embedded titanate nanofiber (TNF) membranes with improved filtration performance are prepared successfully by a two-step method including electrostatic assembly of GO and TNFs into hybrids and subsequent processing of them into membranes by vacuum filtration. The embedded contents of GO sheets in films and thickness of as-assembled films can be adjusted facilely, endowing such composite films with good processability. Owing to the skilful introduction of GO sheets, the pore and/or channel structures in these hybrid membranes are modified. By treating different dye solutions (Direct Yellow and Direct Red), the filtration properties of these membranesshow that the introduction of certain amount of GO sheets efficiently improve the separation performance of the membranes. Interestingly, these GO-embedded TNF membranes also display superior selective separation performance on filtrating the mixture solutions of such two dyes, making these hierarchical membranes more flexible and versatile in water treatment areas.

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“…The unique two-dimensional (2D) structure and the good stability in organic solvents endow graphene nanomaterials to be an ideal candidate for creating novel membranes [15,[21][22][23]. As a result of the uniform interlayer spacing, graphene membranes usually show superior solvents flux and precise molecular sieving for small organic reagents [8,17,18]. Herein, the methods of preparation of different kinds of SRNF membranes with graphene-based nanomaterials are introduced and the comparation of corresponding parameters of different graphene-based SRNF membranes during the filtration process are provided.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, in order to achieve SRNF membranes with high permeability and stability, many nanomaterials including graphene, Mxene, metal-organic frameworks (MOFs) have been applied to fabricate SRNF membranes [8]. Among these nanomaterials, MOFs often exhibit a poor chemical stability and more suitable for use in gas barrier applications [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Graphene-based Membranes for Solvent-resistant Nanofiltration

Song³

et al. 2018

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. Solvent-resistant nanofiltration (SRNF) is a promising technology which developed rapidly in recent years, which exhibits broader application prospects in separation of industries organic solvent system. Among various materials used for SRNF-membranes, graphene-based nanomaterials have aroused great interests due to the unique molecular sieve properties and excellent tolerance to organic solvents and harsh chemical environments. This paper emphatically introduces the progresses of membrane preparation with graphene-based nanomaterials for SRNF and their application in separation processes. The performances including permeability and stability of different kinds of graphene-based SRNF membranes in the process of filtration are also evaluated and discussed. IntroductionMembrane processes are typical advanced technology for selective separation and play an important role in water and wastewater treatment [1]. Among them, nanofiltration membranes usually show high performance in the rejection of bivalent and polyvalent ions under low operation pressure [2]. As we know, the amount of chemicals in the modern world and the conventional intensive energy in separation processes have caused the total quantity of energy for chemical products separation to be astonishing, accounted for 10-15% of the world's total energy consumption [3]. To deal with the multifarious and massive organic solution in practical applications, the solvent-resistant nanofiltration (SRNF) membranes with high permeability and stability are highly desirable [4][5][6].In general, an ideal SRNF membrane should have the following characteristics: (1) high solvent flux and separation performance in organic solvent system; (2) high separation efficiency and structural stability during long-time operation; (3) the synthesized SRNF membranes are suitable for wide solvent separation in industrial application [7]. In recent years, in order to achieve SRNF membranes with high permeability and stability, many nanomaterials including graphene, Mxene, metal-organic frameworks (MOFs) have been applied to fabricate SRNF membranes [8]. Among these nanomaterials, MOFs often exhibit a poor chemical stability and more suitable for use in gas barrier applications [9][10][11][12][13]. Compared with MOFs, grapheme-based materials have attracted numerous

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Reduced Graphene Oxide Membranes for Ultrafast Organic Solvent Nanofiltration

Cited by 379 publications

References 27 publications

Graphene membranes for water desalination

Graphene membranes for water desalination

Processable graphene oxide-embedded titanate nanofiber membranes with improved filtration performance

Fabrication of Graphene-based Membranes for Solvent-resistant Nanofiltration

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