TiO2-incorporated polyelectrolyte composite membrane with transformable hydrophilicity/hydrophobicity for nanofiltration separation

Lu, Yahua; Qin, Zhenping; Wang, Naixin; Guo, Hongxia; An, Quan‐Fu; Liang, Yucang

doi:10.1016/j.cjche.2020.06.029

Cited by 6 publications

(3 citation statements)

References 49 publications

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“…The use of various nanomaterials such as graphene oxide (GO), carbon nanotubes (CNTs), porous frameworks and metal oxides has offered new insights for fabricating advanced membranes for water purification (Jun et al 2020;Lau et al 2015;Wu et al 2020). Among the various available nanomaterials, fabrication of membranes with titanium dioxide (TiO 2 ) has received great attention for fabricating NF, RO and distillation membranes because of its functional properties like physical and chemical stability, low toxicity, wide availability, toughness, photocatalytic activity, flexibility, hydrophilicity, anti-fouling and salt rejection (Bahamonde Soria et al 2020;Kazemi et al 2020;Lu et al 2020). However, by comparing TiO 2 with other nanomaterials such as graphene and GO, graphene is not a hydrophilic material, whereas TiO 2 is hydrophilic in nature, which enables greater water permeability and ultrahigh permeation flux.…”

Section: Introductionmentioning

confidence: 99%

Development of CA-TiO2-incorporated thin-film nanocomposite forward osmosis membrane for enhanced water flux and salt rejection

Jain

Verma

Dhupper

et al. 2021

Int. J. Environ. Sci. Technol.

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Low access to electricity is a significant problem in small and distant areas, where power intensive treatment systems like reverse osmosis can complicate handling requirements. In order to mitigate the energy requirements in such areas, forward osmosis (FO) is an advance option to desalinate and provide potable water cost effectively. In this study, cellulose acetate (CA) was selected as cheap natural green polymer along with nanoscale titanium dioxide (TiO 2 ) particles with different loadings (0.5, 1, 1.5 wt.%) and polyvinyl pyrrolidone (PVP) as a binder to fabricate thin-film nanocomposite (TFNC) FO membranes. Various characterization techniques including XRD, EDS and SEM confirmed the capability of the developed membranes. The results convey that the use of titanium nanoparticles enhanced the membrane's surface morphology resulting in smaller pore sizes, stable water flux, low reverse salt flux and higher salt rejection. The pure water flux of the nanocomposite membranes was dramatically increased compared with that of commercial and control CA membrane. The TFNC CA-TiO 2 -1 (with 1% TiO 2 loading) was the finest membrane with an average water flux of about 58.21 (L/m 2 .h), reverse salt flux of 16.28 (g/m 2 .h) along with 92.6% salt rejection with 1 M NaCl as draw solution (DS). This work revealed that the membranes fabricated in this study are competitive with the current FO membranes. More importantly, they are anticipated to enable the use of energy-efficient and cost-effective FO-based desalination and would help to overcome global water scarcity and provide potable water to remote locations.

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Section: Introductionmentioning

confidence: 99%

Development of CA-TiO2-incorporated thin-film nanocomposite forward osmosis membrane for enhanced water flux and salt rejection

Jain

Verma

Dhupper

et al. 2021

Int. J. Environ. Sci. Technol.

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“…Around pH 6, the membrane is uncharged and CaSO 4 retention is minimal. [15][16][17][18] The purification efficiency of a developed ceramic membrane depends also on surface interactions between the membrane surface and solutes/solvents. The Elaborate UF membrane have the same behavior of Nanofiltration membrane, they can reject multivalent ions with negligible selectivity toward the monovalent ion, which is the only difference from the reverse osmosis technique.…”

Section: Ph Effectmentioning

confidence: 99%

Elaboration of TiO₂ Ultrafiltration Membrane Deposited on Moroccan Sahara Clay

et al. 2021

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In this work, the porous ceramic multilayer ultrafiltration membrane is developed. Macroporous support was formed by extrusion of ceramic paste derived from natural Moroccan Sahara Clay. The microporous interlayer was then performed by slip casting from zirconia commercial powders and finally the active ultrafiltration toplayer was obtained by solgel route using TiO2 sol. The performance of TiO2 ultrafiltration membrane was evaluated by pores diameter, thickness of the top layer, water flux, and molecular weight cut off (MWCO). The water permeability measured for this composite membrane is 9.051 l/(m2·h·bar), the thickness is around 900nm, the pore diameter is centered near 7nm and the MWCO was about 5000Da.

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“…Due to the huge amount of hydrophilic groups in the polymer chain, polyelectrolyte is considered to have strong hydrophilic properties and is thus used to enhance the hydrophilicity of membranes. For instance, polyelectrolytes including poly(diallyl-dimethylammonium chloride), poly(diallyldimethylammonium chloride), poly(acrylic acid), , and poly(methacrylic acid) have been utilized for membrane surface modification by chemical grafting or surface coating to get a hydrophilicity membrane and improve its antifouling ability. However, the interest in polyelectrolyte is substantially restricted to membrane modification since polyelectrolyte-modified membrane requires extra manipulation and materials and increases its manufacturing costs.…”

Section: Introductionmentioning

confidence: 99%

Nanofibrous Kevlar Hydrogel Ultrafiltration Membrane with High Acid Resistance and Antifouling Properties for Wastewater Treatment

et al. 2022

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Membrane fouling and acidic environment instability are inevitable problems restricting the widespread application of membranes in wastewater treatment. Herein, we report a polyelectrolyte hydrogel membrane with high acid resistance and antifouling properties synthesized by phase inversion of Kevlar nanofibers solution. The hydrogel membrane, compared to the commercial PVDF membrane, has a higher rejection of Congo Red, Direct Red 23, and Direct Red 80 solutions, and excellent antifouling performance when filtering bovine serum protein or humic acid solution. The high antifouling performance is attributed to a large number of hydrophilic groups in the structure of the hydrogel, which can induce the formation of a protective layer of hydration, thus reducing the pollutants adsorbed on the surface. Besides, the acid resistance ability of the Kevlar membrane was verified by a phosphoric acid (pH = 0) immersion experiment. Due to the superior performance of this membrane and the onestep preparation process, the developed Kevlar membrane has great potential applications for wastewater treatment.

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TiO2-incorporated polyelectrolyte composite membrane with transformable hydrophilicity/hydrophobicity for nanofiltration separation

Cited by 6 publications

References 49 publications

Development of CA-TiO2-incorporated thin-film nanocomposite forward osmosis membrane for enhanced water flux and salt rejection

Development of CA-TiO2-incorporated thin-film nanocomposite forward osmosis membrane for enhanced water flux and salt rejection

Elaboration of TiO₂ Ultrafiltration Membrane Deposited on Moroccan Sahara Clay

Nanofibrous Kevlar Hydrogel Ultrafiltration Membrane with High Acid Resistance and Antifouling Properties for Wastewater Treatment

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TiO2-incorporated polyelectrolyte composite membrane with transformable hydrophilicity/hydrophobicity for nanofiltration separation

Cited by 6 publications

References 49 publications

Development of CA-TiO2-incorporated thin-film nanocomposite forward osmosis membrane for enhanced water flux and salt rejection

Development of CA-TiO2-incorporated thin-film nanocomposite forward osmosis membrane for enhanced water flux and salt rejection

Elaboration of TiO2 Ultrafiltration Membrane Deposited on Moroccan Sahara Clay

Nanofibrous Kevlar Hydrogel Ultrafiltration Membrane with High Acid Resistance and Antifouling Properties for Wastewater Treatment

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Elaboration of TiO₂ Ultrafiltration Membrane Deposited on Moroccan Sahara Clay