Hybrid TiO2:Au nanostars based polymeric membranes for photocatalytic degradation of ciprofloxacin in water samples

Zheng, Fangyuan; Martins, Pedro M.; Queirós, Joana M.; Tavares, C. J.; Vilas-Vilela, José Luis; Lanceros‐Méndez, S.; Reguera, Javier

doi:10.1016/j.chemosphere.2022.137630

Cited by 12 publications

(4 citation statements)

References 42 publications

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“…They have demonstrated great performance in filtration and water purification in food processing industries. Water purification/treatment by membranes could be achieved by two major processes (adsorption and coagulation/flocculation) (John et al, 2021; Zheng et al, 2023). The adsorption process for water treatment could be physically or chemically driven.…”

Section: Copolymer Application In Water Purification Processmentioning

confidence: 99%

Recent advances of copolymer for water treatment

Alruwais,

Adeosun

2024

Water Environment Research

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Increasing water pollution due to anthropogenic activities prompts the quest for an effective water treatment method. Polymeric materials have gained attention as adsorbents for water purification. Membranes are majorly made from homopolymeric materials. However, recent studies have focused on using copolymeric materials for improved performance. In this review, the basics of copolymerization including various types of copolymers, synthetic approaches, and their applications in various water pollutants removal are discussed in detail. Advances in water treatment technology using copolymeric materials as adsorbent/membranes in the last 4 years are covered with insights into the future outlook and areas of improvement in terms of copolymer composites for water treatment. Studies from the literature did not only reveal effectiveness of copolymer as a flocculant/antifouling materials and in removal of selective toxic metals, oil, and microbes but also demonstrated recyclability of the copolymer sorbents/membrane. Full exploration of unique copolymer textural and structural properties could lead to great advancement in water treatment process.Practitioner Points The copolymer types and synthetic methods are discussed. Application of copolymer as adsorbent/membranes for water treatment is presented. Recent advances show good pollutants removal for toxic metals, oil, and organics. Copolymer composites have great potential as adsorbent/membranes for future use in water treatment processes.

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Section: Copolymer Application In Water Purification Processmentioning

confidence: 99%

Recent advances of copolymer for water treatment

Alruwais,

Adeosun

2024

Water Environment Research

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“…A stirring of 15 min is enough to favour the interaction of both components in the solution. Then, 1 mL of DMAB is poured into the solution in order to reduce the AuNPs in the outer surface of the TiO 2 nanoparticles, and the solution acquires a purple colour which is typical of the synthesis of AuNPs [26][27][28]. This direct contact between the TiO 2 and AuNPs leads to a better photocatalytic efficiency of the precursors and can be activated in the visible light wavelength [10].…”

Section: Deposition Techniquesmentioning

confidence: 99%

Visible Light Activation of Gold Nanoparticles Embedded into Titanium Dioxide Surface in Electrospun Polymeric Coatings

Sandua,

Rivero,

Calvopiña

et al. 2024

Coatings

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This work reports the development of a functional photocatalytic coating based on a combination of polymeric electrospun fibres and nanoparticles that is intended to be activated in the visible light range. In this sense, the resulting fibres can act as an effective matrix for the incorporation of titanium dioxide (TiO2) particles, which are covered by gold nanoparticles (AuNPs), in the outer surface of the metal oxide precursor. In the first step of the process, the optical properties of the nanoparticles were determined by UV-Vis spectroscopy. The extension of the visible absorption can be associated to the localized surface plasmon resonance (LSPR) of the metallic AuNPs. In addition, the resultant particle size distribution and average particle diameter was evaluated by dynamic light scattering (DLS) measurements. Furthermore, the phase composition and porosity of the functional particle powder were analysed by an XRD and N2 adsorption test. In the second step, these synthesized particles have been successfully immobilized into a PAA + β-CD electrospun fibre matrix by using the two different deposition methods of dip-coating and solution-casting, respectively. The morphological characterization of the samples was implemented by means of scanning electron microscopy (SEM), showing uniform and homogeneous, free-beaded fibres with a random distribution of the synthesized particles deposited onto the electrospun fibres. Then, the functional coatings were removed from the substrate, and a thermogravimetric (TGA) analysis was carried out for each sample in order to obtain the precursor mass immobilized in the coating. Once the overall mass of precursor was obtained, the percentage of TiO2 particles and AuNPs in the precursor was calculated by using inductively coupled plasma atomic emission spectrometry (ICP-AES). Finally, the photocatalytic activity of both functional solution and electrospun coatings were evaluated in terms of a gradual degradation of rhodamine B (RhB) dye after continuous exposition to a visible-light lamp.

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“…Similarly, a study reported the inclusion of TiO2 in a poly(vinylidene fluoride-hexafluoropropylene) matrix to remove metronidazole [169] . TiO2 supported on poly (vinylidenefluoride-co-hexafluoropropylene) membrane has been prepared to remove ciprofloxacin in solution [170] . The preparation steps produced a photocatalytic membrane with 80%-90% porosity, a promising membrane for removing ciprofloxacin in an aqueous solution.…”

Section: Tio2 Nanoparticle Incorporated Nanocomposite Membranementioning

confidence: 99%

Development of nanocomposite membranes for removal of pharmaceutically active compounds in water: A review

Adewuyi,

Lau

2023

ACE

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The presence of pharmaceutically active compounds (PhACs) in drinking water sources is a serious global challenge. Although several approaches have been made to overcome the challenge, unfortunately, most wastewater treatment processes still lack the capacity to provide water completely free of PhACs. This review reports the use of nanocomposite membranes as a promising material for the efficient removal of PhACs from the water system. The study revealed that fouling and high energy consumption–the major associative limitations of conventional membranes, can be circumvented by incorporating metal oxides and carbonaceous nanoparticles into nanocomposite membranes. Interestingly, photocatalytic nanocomposite membranes exhibited the additional benefit of complete degradation of PhACs. Therefore, it is essential to focus future studies on understanding the details of the photocatalytic nanocomposite membrane process. Furthermore, conducting more studies on a large scale, cost evaluation, and toxicity profiling of nanocomposite membranes is vital.

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Hybrid TiO2:Au nanostars based polymeric membranes for photocatalytic degradation of ciprofloxacin in water samples

Cited by 12 publications

References 42 publications

Recent advances of copolymer for water treatment

Recent advances of copolymer for water treatment

Visible Light Activation of Gold Nanoparticles Embedded into Titanium Dioxide Surface in Electrospun Polymeric Coatings

Development of nanocomposite membranes for removal of pharmaceutically active compounds in water: A review

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