Novel poly(vinyl alcohol) nanofiltration membrane modified with dopamine coated anatase TiO2 core shell nanoparticles

Khalid, Faiz; Tabish, Mohammad; Bora, Kainat Amin Ismail

doi:10.1016/j.jwpe.2020.101486

Cited by 25 publications

(3 citation statements)

References 40 publications

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“…Various wastes discharged from people's daily life contain various heavy metals, organic pollutants, and bacteria that negatively affect people. Over the past decades, physical, chemical, and biological methods have been widely studied to remove contaminants in wastewater [1][2][3]. Among them, advanced processes like reverse osmosis, photo-Fenton, ozonation, and photocatalytic degradation have been widely employed in the treatment of effluents [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Fe₃O₄@SiO₂@TiO₂@PDA Nanocomposite for the Degradation of Organic Materials

Han¹,

Kim²,

Pak³

et al. 2021

Chem Eng & Technol

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In order to enhance the effectiveness of pollutant removal by photocatalysis under visible light, a multifunctional photocatalyst was prepared by grafting polydopamine (PDA) with the core-shell nanocomposite Fe 3 O 4 @SiO 2 @TiO 2 (FST). The structural, morphological, and magnetic responses of FST@PDA were characterized by X-ray diffraction pattern, Fourier transform infrared spectroscopy, transmission electron microscopy, etc. FST@PDA showed a high degradation rate of rhodamine B, reaching 98.7 % and 95.7 % after 150 min of ultraviolet and visible light radiation, respectively. In addition, the prepared FST@PDA had good safety and high recyclability due to the strong covalent bonds between FST and PDA.

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Section: Introductionmentioning

confidence: 99%

Fe₃O₄@SiO₂@TiO₂@PDA Nanocomposite for the Degradation of Organic Materials

Han¹,

Kim²,

Pak³

et al. 2021

Chem Eng & Technol

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“…Comparison of the prepared membranes with other membranes in terms of pure water flux and photodegradation rate (within 2 h). − …”

Section: Resultsmentioning

confidence: 99%

Self-Cleaning and Photodegradable PVDF-g-IL Dye Wastewater Separation Membranes Modified with Dopamine-Coated TiO₂ Core–Shell Particles

et al. 2023

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In the present work, self-cleaning membranes of ionic liquid-grafted poly(vinylidene fluoride) (PVDF) polydopamine-coated TiO 2 were prepared through a nonsolvent-induced phase separation method. PDA facilitates the uniform dispersion of TiO 2 nanoparticles in PVDF substrates; meanwhile, TiO 2 @PDA core−shell particles and the hydrophilic IL improve the hydrophilicity of PVDF membranes and contribute to the increased average pore size and porosity, significantly improving the pure water permeation flux and dye wastewater flux (the water flux increased to 385.9 Lm −2 h −1 ). In addition, the combined effect of the positively charged IL and the strongly viscous PDA shell layer enhanced the retention and adsorption of dyes so that the retention and adsorption rates of both anionic and cationic dyes were close to 100%. Notably, the hydrophilic PDA allowed more TiO 2 to migrate to the membrane surface during the phase transition; on the other hand, dopamine could promote photodegradation. Therefore, the combined two factors for TiO 2 @PDA were beneficial to the ultraviolet-catalytic (UV-catalytic) degradation of dyes on the surface of the membrane, leading to >80% degradation rates of various dyes. Thus, the high-efficiency and easy-to-operate wastewater treatment technology provides attractive potential for dye removal and resolution of membrane contamination.

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“…During recent decades, there has been growing research interest in the fabrication of nanoparticles and nanocomposite materials due to their intriguing optical, electrical, and mechanical properties [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. Among them, inorganic nanoparticles have been utilized in various applications, such as membranes, conducting materials, electrolytes, and nanocomposites [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. In particular, the fumed silica nanoparticles were effectively used to enhance the permeability of poly(4-methyl-2-pentyne) (PMP) membranes by the increase of free volume for CO 2 separation [ 2 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Olefin Transport by SiO2 Particles for Polymer/Ag Metal/Electron Acceptor Composite Membranes

Kang

2020

Polymers

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We showed the potential of poly(ethylene-co-propylene) (EPR)/silver metal/p-benzoquinone composite membranes for propylene/propane mixtures, i.e., a selectivity of 10 and a mixed gas permeance of 0.5 GPU (1 GPU = 1 × 10−6 cm3 (STP)/(cm2 s cmHg) in a previous study. In this study, we additionally found that the incorporation of fumed silica nanoparticles into EPR/silver metal/p-benzoquinone (p-BQ) composite membranes exhibited much higher permeance and selectivity for propylene/propane mixtures. The positive polarity of silver metal continuously increased with the increasing silica content up to the 0.1 weight ratio, as revealed by x-ray photoelectron spectroscopy (XPS). This increase in the polarity of silver metal was attributed to the enhanced interaction of p-BQ with the surface of Ag nanoparticles by the increased dispersion of p-BQ by fumed silica nanoparticles. Differential scanning calorimetry (DSC) also presented that the glass transition temperature (Tg) of the membranes was almost invariant. Therefore, the improvement of the permeance and selectivity with the silica nanoparticles was attributable to the increased polarity of the silver metal rather than the structural change.

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Novel poly(vinyl alcohol) nanofiltration membrane modified with dopamine coated anatase TiO2 core shell nanoparticles

Cited by 25 publications

References 40 publications

Fe₃O₄@SiO₂@TiO₂@PDA Nanocomposite for the Degradation of Organic Materials

Fe₃O₄@SiO₂@TiO₂@PDA Nanocomposite for the Degradation of Organic Materials

Self-Cleaning and Photodegradable PVDF-g-IL Dye Wastewater Separation Membranes Modified with Dopamine-Coated TiO₂ Core–Shell Particles

Enhanced Olefin Transport by SiO2 Particles for Polymer/Ag Metal/Electron Acceptor Composite Membranes

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Novel poly(vinyl alcohol) nanofiltration membrane modified with dopamine coated anatase TiO2 core shell nanoparticles

Cited by 25 publications

References 40 publications

Fe3O4@SiO2@TiO2@PDA Nanocomposite for the Degradation of Organic Materials

Fe3O4@SiO2@TiO2@PDA Nanocomposite for the Degradation of Organic Materials

Self-Cleaning and Photodegradable PVDF-g-IL Dye Wastewater Separation Membranes Modified with Dopamine-Coated TiO2 Core–Shell Particles

Enhanced Olefin Transport by SiO2 Particles for Polymer/Ag Metal/Electron Acceptor Composite Membranes

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Fe₃O₄@SiO₂@TiO₂@PDA Nanocomposite for the Degradation of Organic Materials

Fe₃O₄@SiO₂@TiO₂@PDA Nanocomposite for the Degradation of Organic Materials

Self-Cleaning and Photodegradable PVDF-g-IL Dye Wastewater Separation Membranes Modified with Dopamine-Coated TiO₂ Core–Shell Particles