Preparation and Characterization of TiO2/g-C3N4/PVDF Composite Membrane with Enhanced Physical Properties

Wang, Huiya; Gong, Ran; Qian, Xinliang

doi:10.3390/membranes8010014

Cited by 20 publications

(11 citation statements)

References 47 publications

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“…weight. The porosity ( ɛ ) of individual fibers was subsequently calculated utilizing Equation (1) [ 58 , 59 ].

where ɛ is the membrane porosity (%), ρ w is the density of water, M w is the weight of wet membrane, M d is the weight of dry membrane, and V is the volume of the membrane specimen.…”

Section: Methodsmentioning

confidence: 99%

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Novel PVDF-PVP Hollow Fiber Membrane Augmented with TiO2 Nanoparticles: Preparation, Characterization and Application for Copper Removal from Leachate

et al. 2021

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High proportion of copper has become a global challenge owing to its negative impact on the environment and public health complications. The present study focuses on the fabrication of a polyvinylidene fluoride (PVDF)-polyvinyl pyrrolidone (PVP) fiber membrane incorporated with varying loading (0, 0.5, 1.0, 1.5, and 2.0 wt%) of titanium dioxide (TiO2) nanoparticles via phase inversion technique to achieve hydrophilicity along with high selectivity for copper removal. The developed fibers were characterized based on scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), permeability, porosity, zeta potential, and contact angle. The improved membrane (with 1.0 wt% TiO2) concentration recorded the maximum flux (223 L/m2·h) and copper rejection (98.18%). Similarly, 1.0 wt% concentration of TiO2 nanoparticles made the membrane matrix more hydrophilic with the least contact angle of 50.01°. The maximum copper adsorption capacity of 69.68 mg/g was attained at 1.0 wt% TiO2 concentration. The experimental data of adsorption capacity were best fitted to the Freundlich isotherm model with R2 value of 0.99573. The hybrid membrane developed in this study has considerably eliminated copper from leachate and the concentration of copper in the permeate was substantially reduced to 0.044 mg/L, which is below standard discharge threshold.

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“…weight. The porosity ( ɛ ) of individual fibers was subsequently calculated utilizing Equation (1) [ 58 , 59 ].

where ɛ is the membrane porosity (%), ρ w is the density of water, M w is the weight of wet membrane, M d is the weight of dry membrane, and V is the volume of the membrane specimen.…”

Section: Methodsmentioning

confidence: 99%

“…weight. The porosity (ε) of individual fibers was subsequently calculated utilizing Equation 1 [58,59].…”

Section: Analysis Of Porositymentioning

confidence: 99%

Novel PVDF-PVP Hollow Fiber Membrane Augmented with TiO2 Nanoparticles: Preparation, Characterization and Application for Copper Removal from Leachate

et al. 2021

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“…Graphite phase g-C3N4 was prepared by a common method [31]. Using melamine as raw material, 10 g of melamine was uniformly ground and placed in a semi-closed crucible.…”

Section: Preparation Of the Pvdf Composite Membranesmentioning

confidence: 99%

High-Hydrophilic and Antifouling Poly (Vinylidene Fluoride) Composite Membranes via in Situ Mosaic- Assembled Nanocrystalline Cellulose and g-C3N4

liu

Guo

et al. 2021

Preprint

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Developing an antifouling and stable separation poly (vinylidene fluoride) (PVDF) membrane for water treatment is of great significance but challenging due to the limitations of its low surface properties and strong hydrophobicity. In this study, a novel multi-block composite ultrafiltration membrane was developed using the mosaic-assembled doping of pineapple leaf nanocrystalline cellulose and g-C3N4. The effects of adding different components on the PVDF composite membrane properties have been analyzed. The surface chemical composition, surface morphology, crystallinity and thermal stability of the composite membranes were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). Both of the tensile strength and elongation length of the PVDF composite membranes were enhanced due to the addition of pineapple leaf nanocellulose and g-C3N4, and the tensile strength and elongation length of PVDF/PEG/g-C3N4/Pineapple leaf nanocellulose composite membrane can reach 10.61 MPa and 8.85 mm. The porosity of the PVDF composite membranes was 46.6%, respectively. The water flux and flux recovery ratio of PVDF/PEG/g-C3N4/Pineapple leaf nanocellulose also can reach 256.75 L/(m2 ⋅h) and up to 82.1%. All the above experimental data showed that the addition of pineapple leaf nanocellulose and g-C3N4 can greatly improve the performance of the PVDF composite membrane. The prepared modified membrane has potential application value in the field of wastewater separation and treatment.

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“…g-C3N4 is a one of the carbon nitride compounds in which carbon and nitrogen atoms are joined together by n-conjugated bonds and form tri-s-triazine structural units [21]. Up to now, there have been several reports on the synthesis and application of the PVDF/g-C3N4 membrane and results revealed that dispersion of g-C3N4 in PVDF leads to enhanced of strength and thermal stability of the membrane (due to physical and chemical interactions between PVDF and functional groups at the surface of g-C3N4) [22][23]. But did not affect hydrophilic or antifouling properties of PVDF.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of PVDF/g-C3N4/chitosan Nanocomposite Membrane for the Removal of Direct Blue 14 Dye

Hasanzade

Gharbani

Derakhshan

et al. 2021

Preprint

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Polyvinylidene fluoride (PVDF)/g-C3N4/Chitosan thin film membranes were prepared for removal of Direct Blue 14 dye (an anionic dye) from aqueous solutions. PVDF/g-C3N4/Chitosan membranes were prepared by immersing of PVDF/g-C3N4 membrane in solution containing various concentrations of chitosan. The resulting membranes were characterized by XRD, FESEM, TEM and AFM. Also, pure water flux, salt rejection, water content, antifouling properties of prepared membranes were investigated. The resulting demonstrate that pure water flux was decreased by increasing of chitosan concentration, while water content, antifouling properties and salt rejection were increased. It is found that chitosan has major impact on the membrane structural properties due to transform of the PVDF membrane into hydrophilic ones. It is reported that maximum 93% rejection of Direct Blue 14 was obtained by PVDF/g-C3N4/Chitosan membrane. Compared to the PVDF/g-C3N4 membrane, the experimental results showed that PVDF/g-C3N4/Chitosan membranes demonstrated high potential mainly due to greater hydrophilicity and further minimizing membrane fouling.

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Preparation and Characterization of TiO2/g-C3N4/PVDF Composite Membrane with Enhanced Physical Properties

Cited by 20 publications

References 47 publications

Novel PVDF-PVP Hollow Fiber Membrane Augmented with TiO2 Nanoparticles: Preparation, Characterization and Application for Copper Removal from Leachate

Novel PVDF-PVP Hollow Fiber Membrane Augmented with TiO2 Nanoparticles: Preparation, Characterization and Application for Copper Removal from Leachate

High-Hydrophilic and Antifouling Poly (Vinylidene Fluoride) Composite Membranes via in Situ Mosaic- Assembled Nanocrystalline Cellulose and g-C3N4

Preparation and Characterization of PVDF/g-C3N4/chitosan Nanocomposite Membrane for the Removal of Direct Blue 14 Dye

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