Functionalized Superwettable Fabric with Switchable Wettability for Efficient Oily Wastewater Purification, in Situ Chemical Reaction System Separation, and Photocatalysis Degradation

Ma, Lili; He, Jinmei; Wang, Jiaxin; Zhou, Yichen; Zhao, Yu; Li, Yuangang; Liu, Xiangrong; Peng, Lei; Qu, Mengnan

doi:10.1021/acsami.9b15952

Cited by 64 publications

(23 citation statements)

References 57 publications

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“…[ 23,24 ] Self‐cleaning membranes responding to environmental stimuli such as magnetic fields, [ 25 ] temperature fluctuations, [ 26 ] and light [ 27,28 ] can cause changes in water flux and surface characteristics. Among the various stimulus‐responsive materials, photocatalytic materials have attracted considerable attention; [ 29–31 ] and TiO 2 is of particular interest because of its high catalytic activity, good chemical stability, low cost, and low toxicity. [ 32,33 ]…”

Section: Methodsmentioning

confidence: 99%

Electrospinning Oriented Self‐Cleaning Porous Crosslinking Polymer for Efficient Dyes Removal

Chen

et al. 2020

Adv Materials Inter

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used to selectively separate molecules on the basis of their electrical properties or shapes. [8-10] The topological morphology of the interfacial polymerization substrate is very important for the construction of supramolecular crosslinking polymers. We believe that the combination of interfacial polymerization [11,12] and electrospinning technology [13] could be a good universal method for preparing composite nanofiltration membranes, the structures and properties of which can be controlled by means of surface modification, [14] adjustment of the electrospinning parameters, [15] and the addition of functional nanoparticles to the spinning solution. Membrane separation technology is now widely used in pollutant treatment. [16-18] However, contamination of porous membrane surfaces is a bottleneck that prevents even wider use of this technology. [19-22] After dye-containing wastewater is filtered, membranes are generally recycled by washing with organic solvents, but this process generates dye-containing organic solvent waste. If this new waste is not handled properly, the dissolved dyes can re-enter the environment and cause secondary pollution. Therefore, the development of innovative methods for controlling membrane surface structure and preparing self-cleaning membranes would be highly valuable. [23,24] Self-cleaning membranes responding to environmental stimuli such as magnetic fields, [25] temperature fluctuations, [26] and light [27,28] can cause changes in water flux and surface characteristics. Among the various stimulusresponsive materials, photocatalytic materials have attracted considerable attention; [29-31] and TiO 2 is of particular interest because of its high catalytic activity, good chemical stability, low cost, and low toxicity. [32,33] In the current study, we interfacially polymerized β-cyclodextrin and four crosslinking agents on polyacrylonitrile (PAN) electrospun nanofibrous substrates with different morphologies (depending on the PAN concentration and the spinning orientation), and we investigated the utility of the resulting composite membranes for dye removal from aqueous solution. If TiO 2 was incorporated in the PAN electrospun nanofibrous substrate, UV irradiation of the used composite membranes efficiently degraded the adsorbed dye, rendering the composite membranes self-cleaning and thus reusable (Scheme 1). First, electrospinning technology was used to fabricate nanofibrous PAN and PAN/TiO 2 membranes with controlled fiber diameter and morphology. Then, β-cyclodextrin and The separation of harmful substances by supramolecular crosslinking polymers is the focus of current research. As far as it is known, supramolecular crosslinking systems based on electrospun nanofibers are rarely reported. However, electrospun nanofibers should be promising candidates for interfacial crosslinking substrates because of their adjustable morphology and can be doped with different functional nanoparticles. In this study, β-cyclodextrin and acyl chloride compounds are interfacially polymerized on polya...

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Section: Methodsmentioning

confidence: 99%

Electrospinning Oriented Self‐Cleaning Porous Crosslinking Polymer for Efficient Dyes Removal

Chen

et al. 2020

Adv Materials Inter

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“…The fabric is used for various oil-water mixtures. 39 However, none of them considered the inherent flammability of cotton fabrics. Therefore, based on the limitations of oil-water separation materials in practical applications, some researchers combine flame retardancy with superwettability.…”

Section: Unfortunatelymentioning

confidence: 99%

“…He et al developed a pH‐responsive multifunctional fabric using modified TiO 2 nanoparticles with a special surface composition. The fabric is used for various oil–water mixtures 39 . However, none of them considered the inherent flammability of cotton fabrics.…”

Section: Introductionmentioning

confidence: 99%

Green fabrication of flame retardant and superhydrophobic materials with application in oil‐water separation

Luo

Wang

et al. 2021

Polymers for Advanced Techs

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Flame-retardant materials with superwettability have received broad attention and research in the field of oil-water separation in recent years. However, it remains big challenging to fabricate flame-retardant and superwettable materials in terms of the complexity and environmental performance. Herein, a non-fluorinated coating containing flame retardants phytic acid/3-aminopropyltriethoxysilane and silica micronparticle/hexadecyltrimethoxysilane was developed. The performance of the coated samples is evaluated by thermogravimetric analysis, limiting oxygen index (LOI), cone calorimetry, and, water contact angle tests. The percentage of residue at 800 C for coated samples (cotton fabric, absorbent cotton, filter paper, cottonwood, packing cardboard) was reduced by 47.6%, 42.2%, 45.5%, 53.2%, and 50.8%, respectively. However, their control samples reduced by 87.4%, 84.6%, 88.4%, 77.2%, and 72.2%, respectively, under the same conditions. The percentage of residue at 800 C for coated samples is much higher than that of the pristine samples. The coated cotton fabric showed excellent flame retardant and superhydrophobic properties. Specifically, the coated cotton fabrics exhibited self-extinguishing properties in the flame burning tests, and the LOI increased significantly from 17.7% to 50.8%. Furthermore, the peak heat release rate and the total heat release values of the coated cotton fabric were significantly declined by 83.4% and 83.6% compared to untreated cotton fabrics, respectively. Additionally, due to its super-hydrophobic surface, the coated cotton fabric exhibited super-strong self-cleaning ability and waterproof performance. The coated cotton fabrics also showed good organic solvent/oil and water separation capabilities while reducing the risk of fire.

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“…The frequent occurrence of oil spills and the increase of industrial wastewater containing organic pollutants have caused severe water pollution, which presents a huge threat to the sustainable development of human beings. − Lots of feasible methods used for oil–water separation such as chemical methods, in situ burning, bioremediation, membrane separation, and the use of sorbents still suffer from tedious processing, low efficiency, high cost, and secondary pollution. − Moreover, industrial wastewater has a complex composition which contains not only various kinds of oils but also water-soluble dyes. Therefore, designing multifunctional materials to eliminate various contaminants from water simultaneously is imperative and important in industrial applications.…”

Section: Introductionmentioning

confidence: 99%

“…reasons for the obvious enhancement of photocatalytic activity are as follows:(1) The thin film structure of TiO 2 and PPy is beneficial for the transmission of photogenerated carriers (2). The porous structure of a sponge can enhance the transportation and adsorption of a reaction solution; the strong absorption of light inside a black interior structure enhances light use efficiency.…”

mentioning

confidence: 99%

Environmentally Safe and Porous MS@TiO₂@PPy Monoliths with Superior Visible-Light Photocatalytic Properties for Rapid Oil–Water Separation and Water Purification

Yan

Xie

et al. 2020

ACS Sustainable Chem. Eng.

114

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Frequent oil spill accidents and industrial wastewater discharge result in severe health and ecological problems. Advanced materials with superwettability have been extensively applied for oil−water separation; however, most of them lack the capacity of removing water-soluble pollutants. Therefore, developing multifunctional materials for oil−water separation including water-soluble organic contaminant removal simultaneously is extremely important and still a challenge. Herein, multifunctional porous MS@TiO 2 @PPy monoliths were fabricated via in situ grown TiO 2 nanocrystals and vapor deposited PPy. The vapor deposition method at room temperature is environmentally friendly. The prepared MS@TiO 2 @PPy monolith exhibits superhydrophilicity and underwater superoleophobicity, which can separate insoluble oil−water mixtures continuously with a high flux (9549 L•m −2 •h −1 ). Importantly, the uniform PPy layer covered on the surface of TiO 2 not only enhances the stability of MS@ TiO 2 but also improves the photocatalytic activity by decreasing the band gap. Moreover, the porous structure of the monolith can enhance the adsorption and transportation of reactants; the strong absorption of light inside a black interior structure can improve the utilization efficiency of light. Thus, the MS@TiO 2 @PPy monolith presents superior photodegradation activity toward watersoluble organic pollutants under simulated sunlight irradiation. The chemical rate constant of MS@TiO 2 @PPy is up to 5.2 times as much as the P25 toward RhB. More importantly, compared with most powder catalysts suffering from limited dye absorption capacity, second pollution, and complicated recovery processes, the MS@TiO 2 @PPy monolith exhibits excellent mechanical and chemical stability, which allows its usage in complex oil−water systems and superior recyclability. Hence, we believe that the environmentally friendly and multifunctional MS@TiO 2 @PPy monolith with superior photocatalytic activity and deep oil−water separation not only allows natural light to be used rationally but also effectively solves the problems of water pollution at low cost and energy consumption.

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Functionalized Superwettable Fabric with Switchable Wettability for Efficient Oily Wastewater Purification, in Situ Chemical Reaction System Separation, and Photocatalysis Degradation

Cited by 64 publications

References 57 publications

Electrospinning Oriented Self‐Cleaning Porous Crosslinking Polymer for Efficient Dyes Removal

Electrospinning Oriented Self‐Cleaning Porous Crosslinking Polymer for Efficient Dyes Removal

Green fabrication of flame retardant and superhydrophobic materials with application in oil‐water separation

Environmentally Safe and Porous MS@TiO₂@PPy Monoliths with Superior Visible-Light Photocatalytic Properties for Rapid Oil–Water Separation and Water Purification

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Functionalized Superwettable Fabric with Switchable Wettability for Efficient Oily Wastewater Purification, in Situ Chemical Reaction System Separation, and Photocatalysis Degradation

Cited by 64 publications

References 57 publications

Electrospinning Oriented Self‐Cleaning Porous Crosslinking Polymer for Efficient Dyes Removal

Electrospinning Oriented Self‐Cleaning Porous Crosslinking Polymer for Efficient Dyes Removal

Green fabrication of flame retardant and superhydrophobic materials with application in oil‐water separation

Environmentally Safe and Porous MS@TiO2@PPy Monoliths with Superior Visible-Light Photocatalytic Properties for Rapid Oil–Water Separation and Water Purification

Contact Info

Product

Resources

About

Environmentally Safe and Porous MS@TiO₂@PPy Monoliths with Superior Visible-Light Photocatalytic Properties for Rapid Oil–Water Separation and Water Purification