Hydrophilic composite membranes for simultaneous separation and photocatalytic degradation of organic pollutants

Mendret, Julie; Hatat-Fraile, Mélisa; Rivallin, Matthieu; Brosillon, Stéphan

doi:10.1016/j.seppur.2013.03.030

Cited by 77 publications

(35 citation statements)

References 30 publications

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“…The flux decline was~89.6% lower on the TiO 2 /Al 2 O 3 composite membrane than on the bare Al 2 O 3 membrane (1.25 vs. 0.13 LMH h −1 ). The higher fouling rate in the bare Al 2 O 3 membrane results from the higher probability of pore fouling in the larger pores of the bare membrane than in the smaller pores of the TiO 2 /Al 2 O 3 composite membrane [23]. The previous results also confirmed that the membrane permeability decreased significantly after immobilizing a TiO 2 layer on the Al 2 O 3 membrane support, as shown in Table 1.…”

Section: Membrane Morphologysupporting

confidence: 62%

“…Such a membrane permeability enhancement can be resulted from improvement of the membrane wettability or higher water temperature induced by the UV irradiation [15,22]. The TiO 2 coating layer can improve surface hydrophilicity under UV radiation due to the production of the hydroxyl groups on membrane [23]. In addition, temperature increase can reduce water viscosity, thereby increasing membrane permeability [22].…”

Section: Membrane Morphologymentioning

confidence: 99%

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Nanostructured Ceramic Photocatalytic Membrane Modified with a Polymer Template for Textile Wastewater Treatment

Ahmad

Kim

et al. 2017

Applied Sciences

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Photocatalytic ceramic membranes have attracted considerable attention for industrial wastewater treatment. However, morphological control of the membrane surface to improve its photocatalytic reactivity for the degradation of organic pollutants remains a challenge. Herein, we report a new nanostructured TiO 2 /Al 2 O 3 composite ceramic membrane prepared from a poly(oxyethylene methacrylate) (POEM) template through a sol-gel method and its photocatalytic performance in the treatment of a model dye compound. The POEM polymeric template allowed the homogeneous distribution of catalytic sites, i.e., the TiO 2 layer, on the Al 2 O 3 membrane surface, resulting in improved organic dye degradation along with effective fouling mitigation. The immobilization of a TiO 2 layer on the Al 2 O 3 membrane support also significantly enhanced the membrane adsorption capacity toward dye organic compounds. An organic removal efficiency of over 96% was achieved with the TiO 2 /Al 2 O 3 composite membrane under Ultraviolet (UV) irradiation. In addition, the self-cleaning efficiency of the TiO 2 /Al 2 O 3 composite membrane was remarkably improved by the degradation of organic foulants on the membrane under UV illumination.

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Section: Membrane Morphologysupporting

confidence: 62%

Section: Membrane Morphologymentioning

confidence: 99%

Nanostructured Ceramic Photocatalytic Membrane Modified with a Polymer Template for Textile Wastewater Treatment

Ahmad

Kim

et al. 2017

Applied Sciences

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“…TiO 2 particles and polar organic functional groups could be immobilized together onto membrane surface, and thereby the immobilization of catalyst and membrane surface modification occurs simultaneously. Based on above, hydrophilicity and antifouling ability of membrane surface can be enhanced due to minimization of mass transfer resistance between the semi-conductor surface and fluid bulk via the forced transport of reactants by convection [5]. Great variety of materials has been used for the membrane surface modification, such as TiO 2 nanotubes [6], TiO 2 -graphene oxide (GO) [7][8][9], carbon nanotubes (CNTs) [10][11][12][13], etc.…”

Section: Introductionmentioning

confidence: 99%

Modified Polyethersulfone Membranes With Photocatalytic Properties

Dzhodzhyk¹,

Kolesnyk²,

Konovalova³

et al. 2017

ChChT

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Abstract.1 The photocatalityc nanocomposite membranes with tin(IV) oxide nanoparticles were obtained by "layerby-layer" self-assembly. Polyelectrolyte complexes with different nature were analyzed as a binder for nanocatalysts. PEI was used as a positively charged polyelectrolyte, and CMC, sodium alginate, κ-or ι-carrageenans were used as negatively charged ones. The presence of SnO 2 on the membrane surface was confirmed by a scanning electron microscopy (SEM). Polyelectrolyte complexation was studied by zeta-potential measurement. The photocatalytic activity of the nanocomposite membranes was evaluated in the process of milk nanofiltration. The modification of polyethersulfone membranes with polyelectrolyte layers and SnO 2 nanoparticles allowed to produce a highly concentrated retentate and membrane flux remained stable for over 8 h.

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“…However, the use of filtration system wastes both time and money. In recent years, photocatalyst film reactors have attracted significant attention because these systems integrate the advantages of film separation (high separation efficiency, easy operation, low energy consumption, and no secondary pollution) and photocatalysis technique [26][27][28][29][30]. However, Ag@AgX film reactors were less studied compared to the powdery Ag@AgX photocatalysts [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Recyclable Ag@AgBr-gelatin film with superior visible-light photocatalytic activity for organic degradation

Zhu

Teng

et al. 2015

Res Chem Intermed

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Recyclable Ag@AgBr-gelatin film was fabricated by a versatile route, i.e., embedding Ag@AgBr grains into gelatin matrix, constructing 3D network structures via the cross-linking reaction between gelatin and cross-linking agent 1,3-bis(vinylsulfonyl) propanol, and forming Ag@AgBr-gelatin film on the nylon mesh. The microstructures and chemical compositions of the obtained films were analyzed by the means of scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, thermo gravimetry/differential thermal analyzer, and Fourier transform infrared spectroscopy. It was revealed that the 3D network structure was formed via the cross-linking reaction between gelatin and cross-linking agent 1,3-bis(vinylsulfonyl) propanol (BVP). Photocatalytic degradation of methyl orange indicated that Ag@AgBr-gelatin film exhibited excellent visible-light photocatalytic activity and recyclability, due to the reason that the 3D networks can Jing Zhu and Changjiang Li have contributed equally to this work and should be considered co-first authors.Electronic supplementary material The online version of this article (efficiently fix Ag@AgBr but hardly hinder the transmissions of reactants and degradation products. The adhesion fastness of Ag@AgBr-gelatin film on nylon mesh enhances with increasing the dosage of cross-linking agent BVP, and the lower limit of BVP dosage for forming unbroken film is 0.02 g/m 2 . Excessive crosslinking would make gelatin network structure too denser, resulting in the decline of photocatalytic activity.

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Hydrophilic composite membranes for simultaneous separation and photocatalytic degradation of organic pollutants

Cited by 77 publications

References 30 publications

Nanostructured Ceramic Photocatalytic Membrane Modified with a Polymer Template for Textile Wastewater Treatment

Nanostructured Ceramic Photocatalytic Membrane Modified with a Polymer Template for Textile Wastewater Treatment

Modified Polyethersulfone Membranes With Photocatalytic Properties

Recyclable Ag@AgBr-gelatin film with superior visible-light photocatalytic activity for organic degradation

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