Polysulfone/N,Pd co-doped TiO2 composite membranes for photocatalytic dye degradation

Kuvarega, Alex T.; Dlamini, Derrick S.; Mamba, Bhekie B.

doi:10.1016/j.seppur.2017.07.064

Cited by 127 publications

(57 citation statements)

References 46 publications

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“…Photocatalytic activity of TiO 2 is limited to UV region due to its large band gap about 3.2eV and cannot absorb visible light [127,128]. Kuvarega et al [129] prepared N,Pd codoped TiO 2 polysulfone membranes via phase inversion method for photocatalytic degradation of dye. Their results revealed that Anatase type N,Pd co-doped TiO 2 nanoparticles polysulfone membranes have high porosity, greater hydrophilicity, better absorption of visible light and high wetability.…”

Section: Membrane Modification With Metal and Metal Oxides Nanomaterialsmentioning

confidence: 99%

A Comprehensive Review on Polymeric Nano-Composite Membranes for Water Treatment

Zahid¹,

Rashid²,

Akram³

et al. 2018

J Membr Sci Technol

182

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During last few decades, membrane technology has emerged as an efficient technique over conventional methods due to its high removal capacity, ease in operation and cost effectiveness for wastewater treatment and production of clean water. Membrane based separations are commonly based on polymeric membranes because of their higher flexibility, easily pore forming mechanism, low cost and smaller space for installation as compared to inorganic membranes. Commonly employed membrane fabrication phase inversion method has been shortly reviewed in this article. Major limitation of membrane based separations is fouling and polymeric membranes being hydrophobic in nature are more prone to fouling. Fouling is a deposition of various colloidal particles, macromolecules (polysaccharides, proteins), salts etc. on membrane surface and within pores thus impedes membrane performance, reduces flux and results in high cost. Modification of polymeric membranes due to its tailoring ability with nanomaterials such as metal based and carbon based results in polymeric nano-composite membranes with high antifouling characteristics. Nanomaterials impart high selectivity, permeability, hydrophilicity, thermal stability, mechanical strength, and antibacterial properties to polymeric membranes via blending, coating etc. modification methods. Characterization techniques has also discussed in later section for studying morphological properties and performance of polymer nano-composite membranes. Graphical Abstract

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Section: Membrane Modification With Metal and Metal Oxides Nanomaterialsmentioning

confidence: 99%

A Comprehensive Review on Polymeric Nano-Composite Membranes for Water Treatment

Zahid¹,

Rashid²,

Akram³

et al. 2018

J Membr Sci Technol

182

View full text Add to dashboard Cite

show abstract

“…There are several reports on the removal of dyes, such as methylene blue (MB) [57,64,143], rhodamine B (RhB) [144] and eosin yellow [30]; pharmaceuticals, including ibuprofen [59], diclofenac [58], carbamazepine [53] and tetracycline [61]; or other pollutants, e.g., phenol [66], humic acids [60,65], and pesticides such as diuron and chlorfenvinphos [145]. There are also reports on using PMs for purification of simulated brackish water and seawater from methyl orange and diphenhydramine [134], as well as secondary effluents from pharmaceuticals [146].…”

Section: Applications Of Pmrs With Pmsmentioning

confidence: 99%

“…The first one is represented by the so-called integrative-type PMRs, in which the photocatalytic reaction and MS take place in one apparatus, i.e., an inorganic or polymeric membrane submerged in the slurry photocatalytic reactor [25,26]. The second category comprises the so-called split-type PMRs.Here the photocatalytic reaction and MS take place in two separate apparatuses, the photocatalysis and membrane modules, which are appropriately coupled [27][28][29].PMRs with immobilized photocatalyst, indicated as PMRs with photocatalytic membrane (PM) [30], are intrinsically integrative-type; the photocatalytic and the membrane separation processes take place in the same unit.Additionally, on the basis of a different approach, the PMRs can also be classified considering the position of the light source, which can be: (i) above/inside the feed tank; (ii) above/inside the membrane unit; and, (iii) above/inside an additional vessel placed between the feed tank and the membrane unit [24].Because of the larger active surface area, which guarantees a good contact between the photocatalyst and the pollutants, it has been reported that PMRs with suspended photocatalyst make it possible to achieve higher efficiency when compared to that of the immobilized system [1,23,31]. As a consequence, the configurations with suspended catalyst have been largely…”

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confidence: 99%

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Overview of Photocatalytic Membrane Reactors in Organic Synthesis, Energy Storage and Environmental Applications

et al. 2019

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This paper presents an overview of recent reports on photocatalytic membrane reactors (PMRs) in organic synthesis as well as water and wastewater treatment. A brief introduction to slurry PMRs and the systems equipped with photocatalytic membranes (PMs) is given. The methods of PM production are also presented. Moreover, the process parameters affecting the performance of PMRs are characterized. The applications of PMRs in organic synthesis are discussed, including photocatalytic conversion of CO2, synthesis of KA oil by photocatalytic oxidation, conversion of acetophenone to phenylethanol, synthesis of vanillin and phenol, as well as hydrogen production. Furthermore, the configurations and applications of PMRs for removal of organic contaminants from model solutions, natural water and municipal or industrial wastewater are described. It was concluded that PMRs represent a promising green technology; however, before the application in industry, additional studies are still required. These should be aimed at improvement of process efficiency, mainly by development and application of visible light active photocatalysts and novel membranes resistant to the harsh conditions prevailing in these systems.

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“…So far, polysulfone (PSf) has been the most common material for support membrane of TFC membrane due to its thermal stability, mechanical integrity as well as resistance toward oxidation and hydrolysis . PSf support membrane is typically prepared from phase inversion process, which involves nonsolvent induced phase separation .…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics and kinetics control of support layer synthesis for enhanced thin film composite membrane performance

Beh

Sum

et al. 2017

J of Applied Polymer Sci

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The desalination performance of a thin film composite (TFC) membrane hinges highly on the surface characteristics of support membrane. In this study, good wettability, regular pore size, and moderate roughness were identified as the critical surface properties of support membrane in forming a defect-free, uniform, and structurally stable polyamide film. These features were tailored by adjusting the thermodynamics and kinetics properties of the polymer solution via polysulfone (PSf)/polyvinylpyrrolidone (PVP) ratio as well as using N,N-dimethylacetamide (DMAc) and N,N-dimethylformamide as co-solvent. It was found that the membrane formation was controlled kinetically by altering the PSf/PVP ratio but thermodynamically by using co-solvent. The TFC membrane with better desalination performance was achieved with the support membrane prepared at PSf/PVP ratio of 0.941 without any co-solvent. The resulting TFC membrane attained the highest permeability ratio of 0.691 bar 21 for water/NaCl filtration in this study.

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Polysulfone/N,Pd co-doped TiO2 composite membranes for photocatalytic dye degradation

Cited by 127 publications

References 46 publications

A Comprehensive Review on Polymeric Nano-Composite Membranes for Water Treatment

A Comprehensive Review on Polymeric Nano-Composite Membranes for Water Treatment

Overview of Photocatalytic Membrane Reactors in Organic Synthesis, Energy Storage and Environmental Applications

Thermodynamics and kinetics control of support layer synthesis for enhanced thin film composite membrane performance

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