An Overview of Recent Progress in Nanofiber Membranes for Oily Wastewater Treatment

Sarbatly, Rosalam; Chiam, Chel-Ken

doi:10.3390/nano12172919

Cited by 16 publications

(6 citation statements)

References 139 publications

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“…Consequently, they exhibit distinctive electrical and physical properties, including high surface‐to‐volume ratio, lightweight, unique porous structure, interconnected porosity, and the potential for incorporating chemical functionalities. As a result of these characteristics, nanofibers have garnered significant attention in recent decades [82–85] . Also used for osmotic energy [86–92] .…”

Section: Various Materials For Osmotic Energy Conversionmentioning

confidence: 99%

“…As a result of these characteristics, nanofibers have garnered significant attention in recent decades. [82][83][84][85] Also used for osmotic energy. [86][87][88][89][90][91][92] Wang et al [93] reported the synthesis of highly flexible and mechanically robust carbonaceous ordered mesoporous nanowires (CMWs) based on arrays of nanofibers using a simple and straightforward soft-templating hydrothermal carbonization approach.…”

Section: Polymersmentioning

confidence: 99%

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Asymmetric Nanoporous Alumina Membranes for Nanofluidic Osmotic Energy Conversion

Zhang,

Wang,

Wang

et al. 2023

Chemistry An Asian Journal

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The potential of harnessing osmotic energy from the interaction between seawater and river water has been recognized as a promising, eco‐friendly, renewable, and sustainable source of power. The reverse electrodialysis (RED) technology has gained significant interest for its ability to generate electricity by combining concentrated and diluted streams with different levels of salinity. Nanofluidic membranes with tailored ion transport dynamics enable efficient harvesting of renewable osmotic energy. In this regard, anodic aluminum oxide (AAO) membranes with abundant nanochannels provide a cost‐effective nanofluidic platform to obtain structures with a high density of ordered pores. AAO can be utilized in constructing asymmetric composite membranes with enhanced ion flux and selectivity to improve output power generation. In this review, we first present the fundamental structure and properties of AAO, followed by summarizing the fabrication techniques for asymmetric membranes using AAO and other nanostructured materials. Subsequently, we discuss the materials employed in constructing asymmetric structures incorporating AAO while emphasizing how material selection and design can resist and promote efficient energy conversion. Finally, we provide an outlook on future applications and address the challenges that need to be overcome for successful osmotic energy conversion.

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Section: Various Materials For Osmotic Energy Conversionmentioning

confidence: 99%

Section: Polymersmentioning

confidence: 99%

Asymmetric Nanoporous Alumina Membranes for Nanofluidic Osmotic Energy Conversion

Zhang,

Wang,

Wang

et al. 2023

Chemistry An Asian Journal

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“…Membrane-based liquid separation processes have substantial roles in industries such as food processing, pharmaceuticals, and petrochemicals [ 1 , 2 , 3 , 4 , 5 , 6 ]. Over the last two decades, membrane technology has also been increasingly employed to address water scarcity issues through wastewater reclamation and desalination [ 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Modification of Liquid Separation Membranes Using Multidimensional Nanomaterials: Revealing the Roles of Dimension Based on Classical Titanium Dioxide

et al. 2023

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Membrane technology has become increasingly popular and important for separation processes in industries, as well as for desalination and wastewater treatment. Over the last decade, the merger of nanotechnology and membrane technology in the development of nanocomposite membranes has emerged as a rapidly expanding research area. The key motivation driving the development of nanocomposite membranes is the pursuit of high-performance liquid separation membranes that can address the bottlenecks of conventionally used polymeric membranes. Nanostructured materials in the form of zero to three-dimensions exhibit unique dimension-dependent morphology and topology that have triggered considerable attention in various fields. While the surface hydrophilicity, antibacterial, and photocatalytic properties of TiO2 are particularly attractive for liquid separation membranes, the geometry-dependent properties of the nanocomposite membrane can be further fine-tuned by selecting the nanostructures with the right dimension. This review aims to provide an overview and comments on the state-of-the-art modifications of liquid separation membrane using TiO2 as a classical example of multidimensional nanomaterials. The performances of TiO2-incorporated nanocomposite membranes are discussed with attention placed on the special features rendered by their structures and dimensions. The innovations and breakthroughs made in the synthesis and modifications of structure-controlled TiO2 and its composites have enabled fascinating and advantageous properties for the development of high-performance nanocomposite membranes for liquid separation.

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“…To improve the purification efficiency of oily wastewater, three main techniques have been developed: flotation, (electro/chemical) coagulation, and utilization of organic solvent filtration membranes [2c,3] . Among these methods, the membrane‐based separation technology is of particular interest given its many advantages, including its simplicity, low operation cost, great separation efficiency, continuous operation capability, and low energy consumption [1a,4] . The membranes could be easily fabricated to exhibit the oleophilic property for effective oil/water separation applications.…”

Section: Introductionmentioning

confidence: 99%

“…This method involves the utilization of the voltage difference between the tip and the collector after preparing a polymer precursor solution. It can precisely tune the diameter of nanofibers and can be easily controlled by several electrospinning parameters, including the miscibility of the solvent and polymer, applied voltage, viscosity, the solution conductivity [1a,9d,10] . In addition, the degree of porosity and pore size of the nanofibers can also be tuned by the electrospinning conditions.…”

Section: Introductionmentioning

confidence: 99%

Superoleophobic Polyketone Nanofiber Membranes for Efficient Separation of Oil/water Emulsions

et al. 2023

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Electrospun nanofiber membranes derived from polyketone (PK) are precisely fabricated to exhibit an excellent separation efficiency for oil/water emulsions. The fiber diameter and pore size of the membrane are controlled by introducing NaOH to the precursor solution prior to electrospinning. The surface properties of the nanofibers are then controlled by the removal of NaOH with water and reduction of functional groups with sodium borohydride (NaBH 4 ) to exhibit an air-water superhydrophilicity and underwater superoleophobicity. This surface conversion proc-ess is easily monitored by the water contact angle and the underwater oil contact angle. Oil/water emulsions, including toluene, soybean oil, and hexadecane are filtered through the membranes to examine their separation efficiency and flux using total organic carbon and UV-Vis measurements. The optimized membrane exhibits the minimum 97 % separation efficiency for all three oil/water emulsions and recyclability without notably losing its flux under gravitydriven filtration conditions.

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An Overview of Recent Progress in Nanofiber Membranes for Oily Wastewater Treatment

Cited by 16 publications

References 139 publications

Asymmetric Nanoporous Alumina Membranes for Nanofluidic Osmotic Energy Conversion

Asymmetric Nanoporous Alumina Membranes for Nanofluidic Osmotic Energy Conversion

Modification of Liquid Separation Membranes Using Multidimensional Nanomaterials: Revealing the Roles of Dimension Based on Classical Titanium Dioxide

Superoleophobic Polyketone Nanofiber Membranes for Efficient Separation of Oil/water Emulsions

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