Physical properties of PVDF-GO/black-TiO2 nanofibers and its photocatalytic degradation of methylene blue and malachite green dyes

Abdelmaksoud, M.; Mohamed, Alaa; Sayed, Abderrahman; Khairy, S. A.

doi:10.1007/s11356-021-12618-1

Cited by 20 publications

(3 citation statements)

References 62 publications

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“…This means that the photocatalytic membranes prepared in this work are not visible-light photoresponsive materials. To achieve that goal, TiO 2 -based heterostructures (e.g., TiO 2 -Ag and TiO 2 -graphene oxide) could be used instead of bare TiO 2 [53,54]. The Tauc plot method using the Kubelka-Munk function was applied to calculate the band-gap energy of TiO 2 -P25 and PVDF-P25 samples [55] resulting in similar values for all the samples (Figure 8b).…”

Section: Membrane Characterizationmentioning

confidence: 99%

“…Using visible-responsive materials in the photocatalytic membrane could lower the band-gap energy. Thus, band-gap energies of 2.7 eV, 2.29 eV, and 2.59 eV have been reported for PVDF membranes loaded with g-C 3 N 4 , TiO 2 -Ag heterostructures, and TiO 2 -graphene oxide, respectively [27,53,54]. Photoluminescence (PL) spectroscopy is useful to investigate electron-hole recombination mechanisms in semiconductor materials.…”

Section: Membrane Characterizationmentioning

confidence: 99%

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Nanocomposite PVDF/TiO2 Photocatalytic Membranes for Micropollutant Removal in Secondary Effluent

Aldana,

Pedrosa,

Silva

et al. 2024

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In this study, a mixed-matrix method was used to prepare PVDF polymeric membranes with different amounts of TiO2 P25 photocatalyst embedded, which were employed in filtration processes in the presence of UV radiation (LED, peak emission at 375 nm) to eliminate two aqueous micropollutants (MPs) used as model compounds (venlafaxine and metoprolol). The obtained membranes were characterized to gain insights into their texture, morphology, composition, and other catalyst-related properties that could affect the photocatalytic filtration process. For that purpose, N2 adsorption–desorption, contact angle, SEM-EDX, thermal analysis, FTIR, XPS, UV-vis DRS, and PL spectroscopy were used. Filtration tests were carried out in continuous mode using a dead-end filtration cell to evaluate the performance of the prepared membranes in removing the selected MPs. Experiments were performed both in ultrapure water and a secondary effluent from a municipal wastewater treatment plant. It was found that the synthesized membranes could effectively remove the target MPs in ultrapure water, achieving up to 99% elimination. Such process performance decreased drastically in the secondary effluent with removals below 35%. Carbonate/bicarbonate ions in the secondary effluent were identified as the main scavenging substances. Thus, after the partial removal of carbonate/bicarbonate ions from the secondary effluent, the removal of MPs achieved was above 60%.

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Section: Membrane Characterizationmentioning

confidence: 99%

Section: Membrane Characterizationmentioning

confidence: 99%

Nanocomposite PVDF/TiO2 Photocatalytic Membranes for Micropollutant Removal in Secondary Effluent

Aldana,

Pedrosa,

Silva

et al. 2024

Catalysts

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“…The properties of nanofibers can be tweaked to provide more versatility in the end-product's surface functionalities. Many studies use Ti-alkoxides and Ti-halides as TiO 2 precursors, but these are insoluble in water [65,89,[94][95][96][97][98]. TiO 2 nanofibers made from water-soluble precursors make it possible to combine TiO 2 with other metal oxides via water-soluble precursors [99].…”

Section: Tio 2 Nanofiber-based Membranesmentioning

confidence: 99%

Prospects of Synthesized Magnetic TiO2-Based Membranes for Wastewater Treatment: A Review

et al. 2021

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Global accessibility to clean water has stressed the need to develop advanced technologies for the removal of toxic organic and inorganic pollutants and pathogens from wastewater to meet stringent discharge water quality limits. Conventionally, the high separation efficiencies, relative low costs, small footprint, and ease of operation associated with integrated photocatalytic-membrane (IPM) technologies are gaining an all-inclusive attention. Conversely, photocatalysis and membrane technologies face some degree of setbacks, which limit their worldwide application in wastewater settings for the treatment of emerging contaminants. Therefore, this review elucidated titanium dioxide (TiO2), based on its unique properties (low cost, non-toxicity, biocompatibility, and high chemical stability), to have great potential in engineering photocatalytic-based membranes for reclamation of wastewater for re-use. The environmental pathway of TiO2 nanoparticles, membranes and configuration types, modification process, characteristics, and applications of IPMs in water settings are discussed. Future research and prospects of magnetized TiO2-based membrane technology is highlighted as a viable water purification technology to mitigate fouling in the membrane process and photocatalyst recoverability. In addition, exploring life cycle assessment research would also aid in utilizing the concept and pressing for large-scale application of this technology.

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A State‐of‐Art Review of the Metal Oxide‐Based Nanomaterials Effect on Photocatalytic Degradation of Malachite Green Dyes and a Bibliometric Analysis

et al. 2023

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A wide range of hard contaminants in wastewater is generated from different industries as byproducts of the organic compound. In this review, various metal oxide-based nanomaterials are employed for the photocatalytic removal of malachite green (MG) dye from wastewater. Some cost-effective and appropriate testing conditions are used for degrading these hard dyes to get higher removal efficiency. The effects of specific parameters are considered such as how the catalyst is made, how much dye is in the solution at first, how much nanocatalyst is needed to break down the dye, the initial pH of the dye solution, the type of light source used, the year of publications, and how long the dye has to be exposed to light to be removed. This study suggests that Scopus-based core collected data employ bibliometric methods to provide an objective analysis of global MG dye from 2011 to 2022 (12 years). The Scopus database collects all the information (articles, authors, keywords, and publications). For bibliometric analysis, 658 publications are retrieved corresponding to MG dye photodegradation, and the number of publications increases annually. A bibliometric study reveals a state-of-art review of metal oxide-based nanomaterials' effects on photocatalytic degradation of MG dyes (12 years).

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Physical properties of PVDF-GO/black-TiO2 nanofibers and its photocatalytic degradation of methylene blue and malachite green dyes

Cited by 20 publications

References 62 publications

Nanocomposite PVDF/TiO2 Photocatalytic Membranes for Micropollutant Removal in Secondary Effluent

Nanocomposite PVDF/TiO2 Photocatalytic Membranes for Micropollutant Removal in Secondary Effluent

Prospects of Synthesized Magnetic TiO2-Based Membranes for Wastewater Treatment: A Review

A State‐of‐Art Review of the Metal Oxide‐Based Nanomaterials Effect on Photocatalytic Degradation of Malachite Green Dyes and a Bibliometric Analysis

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