Reusable Ag@TiO2-Based Photocatalytic Nanocomposite Membranes for Solar Degradation of Contaminants of Emerging Concern

Aoudjit, Lamine; Salazar, Hugo; Zioui, Djamila; Sebti, Aicha; Martins, Pedro M.; Lanceros‐Méndez, S.

doi:10.3390/polym13213718

Cited by 26 publications

(9 citation statements)

References 85 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…• OH + MB → MB degradation products (18) Under the action of UV radiation, small amounts of acetone led to the formation of OH radicals that increase the rate of the methylene blue degradation reaction.…”

Section: Mb Photocatalytic Degradationmentioning

confidence: 99%

“…Owing to their high potential applicability in wastewater treatment in a relatively cheap and green manner, the photocatalytic materials are now being intensively investigated [15][16][17]. Titanium dioxide (TiO 2 ) is the most used solid for photocatalytic reactions, due to its high photocatalytic efficiency, biological and chemical inertness, low toxicity and easy availability at an acceptable price [18]. Titanium dioxide mainly exists in three crystallographic phases: rutile, anatase and brookite.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhancing the TiO2-Ag Photocatalytic Efficiency by Acetone in the Dye Removal from Wastewater

Duduman

Castro

Apostolescu

et al. 2022

Water

View full text Add to dashboard Cite

TiO2 nanoparticles synthesized by the sol-gel method and doped with Ag were characterized by SEM, EDAX, FTIR, BET, XRD and TEM, then tested in the photocatalytic degradation of methylene blue (MB) under UV irradiation. The experimental results indicate that the average size of the raw particles was 10 nm, and their size was increased by calcination. The photocatalytic degradation of MB on nanostructured TiO2-Ag shows a high degradation efficiency upon the addition of a photosensitizer. A parametric study of the process was performed and has revealed the optimal value of the photocatalyst dose (0.3 g L−1) at a MB concentration of 4 ppm. Afterwards, the effect of acetone as a photosensitizer was studied. A MB degradation mechanism was proposed to explain the synergy between the TiO2 and the silver nanoparticles in the degradation performance. Under the optimal experimental conditions, at photosensitizer doses of 0.1 and 0.2%, yields of 92.38% and 97.25% MB degradation were achieved, respectively. Kinetic models showed that, at 0.1% acetone concentration, the data fit the pseudo-first-order model, while at 0.2% acetone, the photodegradation mechanism fits a second-order model. The values of the apparent rate constants indicate that the reaction rate increased between 24 and 40 times in the presence of acetone on TiO2 and TiO2-Ag. The addition of acetone modified the photodegradation mechanism and the Ag-doped samples became more active. The results of recycling tests using calcined TiO2-Ag material clearly show that the material was highly photocatalytically stable for the MB degradation. According to experimental results, the dye degradation decreased from 97.25% to 92.39% after four consecutive cycles. This simple approach could be applied for the advanced cleaning of wastewater contaminated with dyes, in the perspective of its reuse.

show abstract

Section: Mb Photocatalytic Degradationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancing the TiO2-Ag Photocatalytic Efficiency by Acetone in the Dye Removal from Wastewater

Duduman

Castro

Apostolescu

et al. 2022

Water

View full text Add to dashboard Cite

show abstract

“…Aoudjit et al immobilized Ag-functionalized TiO 2 NPs into the poly(vinylidene fluoride-hexafluoropropylene) matrix and tested photocatalytic activity against an emerging contaminant, metronidazole, under solar radiation. The results revealed a maximum degradation efficiency of 100% with an initial metronidazole concentration of 10

at a pH of 7 under 5 h of solar radiation [ 185 ]. Zhang et al prepared a PVDF nanocomposite membrane by pre-dispersing TiO 2 NPs via PEG additive, which ensured uniformly spaced surface pores, larger porosity, high water flux, negative zeta potential, and an increased hydrophilicity of the membrane.…”

Section: Incorporation Of Nps In Tfncs/mmmsmentioning

confidence: 99%

Advanced Polymeric Nanocomposite Membranes for Water and Wastewater Treatment: A Comprehensive Review

Sahu¹,

Dosi

Kwiatkowski

et al. 2023

Polymers

View full text Add to dashboard Cite

Nanomaterials have been extensively used in polymer nanocomposite membranes due to the inclusion of unique features that enhance water and wastewater treatment performance. Compared to the pristine membranes, the incorporation of nanomodifiers not only improves membrane performance (water permeability, salt rejection, contaminant removal, selectivity), but also the intrinsic properties (hydrophilicity, porosity, antifouling properties, antimicrobial properties, mechanical, thermal, and chemical stability) of these membranes. This review focuses on applications of different types of nanomaterials: zero-dimensional (metal/metal oxide nanoparticles), one-dimensional (carbon nanotubes), two-dimensional (graphene and associated structures), and three-dimensional (zeolites and associated frameworks) nanomaterials combined with polymers towards novel polymeric nanocomposites for water and wastewater treatment applications. This review will show that combinations of nanomaterials and polymers impart enhanced features into the pristine membrane; however, the underlying issues associated with the modification processes and environmental impact of these membranes are less obvious. This review also highlights the utility of computational methods toward understanding the structural and functional properties of the membranes. Here, we highlight the fabrication methods, advantages, challenges, environmental impact, and future scope of these advanced polymeric nanocomposite membrane based systems for water and wastewater treatment applications.

show abstract

“…The process exhibited a high removal capacity of 91.40%, attributed to the photocatalytic activity of the incorporated TiO2. 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] .…”

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

View full text Add to dashboard Cite

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.

show abstract

Reusable Ag@TiO2-Based Photocatalytic Nanocomposite Membranes for Solar Degradation of Contaminants of Emerging Concern

Cited by 26 publications

References 85 publications

Enhancing the TiO2-Ag Photocatalytic Efficiency by Acetone in the Dye Removal from Wastewater

Enhancing the TiO2-Ag Photocatalytic Efficiency by Acetone in the Dye Removal from Wastewater

Advanced Polymeric Nanocomposite Membranes for Water and Wastewater Treatment: A Comprehensive Review

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

Contact Info

Product

Resources

About