Photocatalytic microfiltration membranes produced by magnetron sputtering with self-cleaning capabilities

Coelho, Leticya Lais; Grao, Matthieu; Pomone, Thomas; Ratova, Marina; Kelly, Peter; Wilhelm, Michaela; Moreira, Regina de Fátima Peralta Muniz

doi:10.1016/j.tsf.2022.139143

Cited by 13 publications

(5 citation statements)

References 51 publications

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“…In general, it is reported that the main drawback of the use of membranes is the high cost of capital, along with the high energy required and the reagents for cleaning them, contributing significantly to an increase in costs [ 47 ]. This is why, specific membrane design studies are currently being carried out, with capacity and self-cleaning, allowing an improvement in both efficiency and costs [ 81 ]. However, further research is still needed.…”

Section: Resultsmentioning

confidence: 99%

Integrated full-scale solar CPC/UV-LED–filtration system as a tertiary treatment in a conventional WWTP for agricultural reuse purposes

Ponce-Robles

Mena²,

Diaz³

et al. 2022

Photochem Photobiol Sci

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Today, the emergence of increasingly restrictive treatment and reuse policies make the implementation of full-scale tertiary treatment, capable of improving the quality of water, a priority. Full-scale TiO2 photocatalysis systems are resulting in a promising option, since TiO2 is commercially available. However, questions such as how to work continuously during day/night irradiation cycle, or the removing of TiO2 in outlet flow are still unresolved. In this work, a full-scale system integrating a solar CPC/UV-LED step combined with commercial microfiltration membranes was installed in a conventional WWTP for agricultural reuse purposes. After optimization, 0.5 g/L of catalyst and combined SOLAR + UV-LED showing the highest pharmaceutical removal percentages, while a self-designed UV-LED included in the own reaction tank resulting in higher efficiencies compared with commercial lamps. Longer membrane surface area decreased fouling problems in the system. However, 60 min of irradiation time was necessary to reach the most restrictive water quality values according with (EU 2020/741). After optimization step, total costs were reduced by 45%. However, it was shown that a reduction in operating and maintenance costs, along with the development of more effective and economical commercial filtration membranes is a key factor; therefore, working on these aspects is essential in the treated water cost reduction. Graphical abstract

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Section: Resultsmentioning

confidence: 99%

Integrated full-scale solar CPC/UV-LED–filtration system as a tertiary treatment in a conventional WWTP for agricultural reuse purposes

Ponce-Robles

Mena²,

Diaz³

et al. 2022

Photochem Photobiol Sci

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“…The self-cleaning test has been assessed using 70 Wt.% of methylene-blue dye. In general, methylene-blue dye is commonly used for photocatalysis test on superhydrophilic coating (Yun et al , 2012; Coelho et al , 2022; George et al , 2022) and for self-cleaning test on hydrophobic coated glass (Syafiq et al , 2019). The 10 mL of methylene blue solution was injected onto glass surface at inclination angle of 45°.…”

Section: Resultsmentioning

confidence: 99%

Development of self-cleaning polydimethylsiloxane/nano-calcium carbonate-titanium dioxide coating with fog-resistance response for building glass

Syafiq

Rahim

Vengadaesvaran

et al. 2022

PRT

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Purpose This paper introduced the simple synthesis process of self-cleaning coating with fog-resistance property using hydrophobic polydimethylsiloxane (PDMS) polymer and nano-calcium carbonate (nano-CaCO3) and titanium dioxide (TiO2). Design/methodology/approach The synthesis method of PDMS/nano-CaCO3-TiO2 is based on sol-gel process. The crosslinking between PDMS and nanoparticles is driven by the covalent bond at temperature of 50°C. The 3-Aminopropyltriethoxysilane is used as binder for nanoparticles attachment in polymer matrix. Two fabrication methods are used, which are dip- and spray-coating methods. Findings The prepared coated glass fulfilled the requirement of standard self-cleaning and fog-resistance performance. For the self-cleaning test BS EN 1096-5:2016, the coated glasses exhibited the dust haze value around 20%–25% at tilt angle of 10°. For the antifog test, the coated glasses showed the fog haze value were below 2% and the gloss value were above 85%. The obtained results completely achieved the standard antifog value ASTM F659-06 protocol. Research limitations/implications Findings will provide an infrastructure support for the building glass to enhance building’s energy efficiency, cleaning performance and friendly environment. Practical implications This study proposed the simple synthesis method using hydrophobic polymer and nano-CaCO3 and nano-TiO2, which can achieve optimum self-cleaning property at low tilt angle and fog-resistance performance for building glass. Social implications The research findings have high potential for building company, cleaning building company and government sector. The proposed project capable to reduces the energy consumption about 20% per annum due to labor cost, time-consuming and safety during manual cleaning. Originality/value The novel method to develop self-cleaning coating with fog-resistance using simple synthesis process and fabrication method for building glass application.

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“…For example, TiO 2 -modified membrane prepared by depositing TiO 2 on flat alumina membranes by magnetron sputtering showed a significant capability of degrading methylene blue under UV light. 10 Similarly, Zhang et al 11 successfully deposited N elements into the TiO 2 lattice by atomic layer deposition to prepare membrane materials that can successfully mitigate the bovine serum albumin (BSA) fouling under visible light. Zhang et al 12 successfully prepared photocatalytic graphite oxide/M88A nanofiber membranes with photo-Fenton self-cleaning properties, possessing ultrahigh water flux and photocatalytic activity by ultrasonic-assisted low-temperature hydrothermal synthesis.…”

Section: Introductionmentioning

confidence: 99%

In situ oxidized TiO₂/MXene ultrafiltration membrane with photocatalytic self-cleaning and antibacterial properties

Zhao

et al. 2023

RSC Adv.

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Photocatalytic microfiltration membranes produced by magnetron sputtering with self-cleaning capabilities

Cited by 13 publications

References 51 publications

Integrated full-scale solar CPC/UV-LED–filtration system as a tertiary treatment in a conventional WWTP for agricultural reuse purposes

Integrated full-scale solar CPC/UV-LED–filtration system as a tertiary treatment in a conventional WWTP for agricultural reuse purposes

Development of self-cleaning polydimethylsiloxane/nano-calcium carbonate-titanium dioxide coating with fog-resistance response for building glass

In situ oxidized TiO₂/MXene ultrafiltration membrane with photocatalytic self-cleaning and antibacterial properties

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Photocatalytic microfiltration membranes produced by magnetron sputtering with self-cleaning capabilities

Cited by 13 publications

References 51 publications

Integrated full-scale solar CPC/UV-LED–filtration system as a tertiary treatment in a conventional WWTP for agricultural reuse purposes

Integrated full-scale solar CPC/UV-LED–filtration system as a tertiary treatment in a conventional WWTP for agricultural reuse purposes

Development of self-cleaning polydimethylsiloxane/nano-calcium carbonate-titanium dioxide coating with fog-resistance response for building glass

In situ oxidized TiO2/MXene ultrafiltration membrane with photocatalytic self-cleaning and antibacterial properties

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In situ oxidized TiO₂/MXene ultrafiltration membrane with photocatalytic self-cleaning and antibacterial properties