New generation nanomaterials for water desalination: A review

Teow, Yeit Haan; Mohammad, Abdul Wahab

doi:10.1016/j.desal.2017.11.041

Cited by 327 publications

(114 citation statements)

References 97 publications

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“…CNTs and graphene are two types of pure carbon allotropes ( Figure a) in which three of the four valance electrons are covalently shared in a 2D plane to form a σ bond, a relatively strong force, and the last valance electron is delocalized among all atoms, forming a weak π bond in the third dimension 9a,15. Therefore, CNTs and graphene could form physical interactions, such as π bonds, van der Waals forces or electrostatic forces with some certain organics to make chemicals attach to them without any change in their own chemical or physical properties . In addition, chemical bonding of organics and CNT/graphene is also possible via the dangling bonds or functional groups on the basal surface, such as carboxyl or hydroxyl groups (Figure b).…”

Section: Adsorption Mechanism Of Water/organics In Pure Cnts and Grapmentioning

confidence: 99%

The Application of Carbon Nanotube/Graphene‐Based Nanomaterials in Wastewater Treatment

Yin

Cui

Chen

et al. 2019

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144

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The treatment of organic wastewater is of great significance. Carbon nanotube (CNT)/graphene‐based nanomaterials have great potential as absorbent materials for organic wastewater treatment owing to their high specific surface area, mesoporous structure, tunable surface properties, and high chemical stability; these attributes allow them to endure harsh wastewater conditions, such as acidic, basic, and salty conditions at high concentrations or at high temperatures. Although a substantial amount of work has been reported on the performance of CNT/graphene‐based nanomaterials in organic wastewater systems, engineering challenges still exist for their practical application. Herein, the adsorption mechanism of CNT‐ and graphene‐based nanomaterials is summarized, including the adsorption mechanism of CNTs and graphene at the atomic and molecular levels, their hydrophilic and hydrophobic surface properties, and the structure–property relationship required for adsorption to occur. Second, the structural modification and recombination methods of CNT‐ and graphene‐based adsorbents for various organic wastewater systems are introduced. Third, the engineering challenges, including the molding of macroscopically stable adsorbents, adsorption isotherm models and adsorption kinetic behaviors, and reversible adsorption performance compared to that of activated carbon (AC) are discussed. Finally, cost issues are discussed in light of scalable and practical application of these materials.

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Section: Adsorption Mechanism Of Water/organics In Pure Cnts and Grapmentioning

confidence: 99%

The Application of Carbon Nanotube/Graphene‐Based Nanomaterials in Wastewater Treatment

Yin

Cui

Chen

et al. 2019

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144

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“…This situation has encouraged the development of the water desalination technologies, and particularly of those addressed to cost-effectiveness and energy-efficiency. Among them, the capacitive deionization (CDI) is one of the most attractive for its simplicity and eco-friendliness, and it has recently received great attention [189][190][191].…”

Section: Capacitive Deionization Of Watermentioning

confidence: 99%

Electrospun Nanomaterials for Energy Applications: Recent Advances

Santangelo

2019

Applied Sciences

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Electrospinning is a simple, versatile, cost-effective, and scalable technique for the growth of highly porous nanofibers. These nanostructures, featured by high aspect ratio, may exhibit a large variety of different sizes, morphologies, composition, and physicochemical properties. By proper post-spinning heat treatment(s), self-standing fibrous mats can also be produced. Large surface area and high porosity make electrospun nanomaterials (both fibers and three-dimensional fiber networks) particularly suitable to numerous energy-related applications. Relevant results and recent advances achieved by their use in rechargeable lithium- and sodium-ion batteries, redox flow batteries, metal-air batteries, supercapacitors, reactors for water desalination via capacitive deionization and for hydrogen production by water splitting, as well as nanogenerators for energy harvesting, and textiles for energy saving will be presented and the future prospects for the large-scale application of electrospun nanomaterials will be discussed.

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“…There are different methods based on physical, chemical, and biological combinations which are used for water purification. The adsorption of pollutants onto adsorbent surfaces is known to be one of the simplest and most eco-friendly, economically feasible, and effective techniques for industrial wastewater purification [4][5][6]. There are different types of adsorbents such as natural, biomass, agricultural, and industrial waste adsorbents used as solid adsorbents for wastewater purification [4].…”

Section: Introductionmentioning

confidence: 99%

“…There are different types of adsorbents such as natural, biomass, agricultural, and industrial waste adsorbents used as solid adsorbents for wastewater purification [4]. Moreover, advanced adsorbents based on polymers and nanomaterials such as carbon-based nanomaterials (carbon nanotubes and graphene), noble-metal-based nanomaterials, metal oxides (silica, titania, zirconia, and zinc oxides), nanocomposites, magnetic nanocomposites, dendritic polymers, and geopolymer cement have been reported for the desalination and removal of different pollutants from wastewater [5][6][7][8][9][10]. However, nanomaterials have to face some inherent technical problems when being applied to the production of large-scale adsorbents in water treatments such as aggregations, potentially adverse effects imposed on human health and ecosystems, difficult separation, and leakage into water systems.…”

Section: Introductionmentioning

confidence: 99%

Novel Magnetic Silica-Ionic Liquid Nanocomposites for Wastewater Treatment

et al. 2019

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In this work, new imidazolium silica-ionic liquids doped with magnetite nanocomposites are prepared for use in the field of water purification owing to their unique properties, which can be manipulated by an external magnetic field. A silane precursor based on aminopropyltriethoxysilane (APTS) condensed with p-hydroxybenzaldehyde and glyoxal in an acetic acid solution is used to prepare disiloxyimidazolium ionic liquid (SIMIL). The silica composite (Si-IL) and silica-coated magnetite (Fe 3 O 4 -Si-IL) composites are prepared using the sol-gel technique. The chemical structures, morphologies, crystalline lattice structures, thermal stabilities, surface charges, surface areas, particle sizes, and magnetic characteristics of Fe 3 O 4 -Si-IL and Si-IL are investigated. The Fe 3 O 4 -Si-IL and Si-IL nanocomposites show excellent chemical adsorption capacities as 653 and 472 mg g −1 , respectively, during times ranging 90 to 110 min when they are used as adsorbents to remove Congo red (CR) dye as a water pollutant.Nanomaterials 2020, 10, 71 2 of 19 and integrate the merits of functional nanoparticles and vary the solid hosts of the large sizes of materials [8][9][10]. Although magnetic nanocomposites have achieved excellent results with adsorption and reuse for different cycles in the field of water treatment, some research challenges exist for their application to remove some pollutants such as toxic radioactive metals and organic and agricultural pollutants [9].The concept of a synergistic combination of two nanoparticles into a larger one has become one of the proposed synthetic techniques used to design advanced nano-adsorbents for water treatments [11][12][13][14]. Most of these materials are based on mesoporous silica-based adsorbents [15][16][17]. The large pore sizes, high specific area, good thermal and chemical stability, low manufacture cost, and excellent selectivity towards specific pollutants elect the ordered mesoporous silica composites as excellent adsorbents for water purification and treatment [17][18][19]. Highly dispersed and magnetic silica nanoparticles with large-scale chemical or sonochemical synthesis methods have been reported [20][21][22][23][24][25].With the large amount of literature available for the production of magnetic silica nanoparticles and with research still being published, perhaps some of the biggest challenges to overcome regard the production of greener selective magnetic silica nano-adsorbents for removal of organic pollutants; these are still a problem facing researchers. Organic cationic and anionic salts based on imidazolium, pyridinium, and quaternary ammonium cations which have been designated as ionic liquids (ILs) are widely used as greener extraction solvents for seawater desalination and industrial water and activated sludge treatments [26][27][28][29]. Poly (ionic liquid) (PIL) nanoparticles are used as flocculants for water purification [28], and hydrophobic PILs have been used for the selective separation of methylene blue (MB) dye and chromium ions from water [3...

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New generation nanomaterials for water desalination: A review

Cited by 327 publications

References 97 publications

The Application of Carbon Nanotube/Graphene‐Based Nanomaterials in Wastewater Treatment

The Application of Carbon Nanotube/Graphene‐Based Nanomaterials in Wastewater Treatment

Electrospun Nanomaterials for Energy Applications: Recent Advances

Novel Magnetic Silica-Ionic Liquid Nanocomposites for Wastewater Treatment

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