Synthesis, modification and optimization of titanate nanotubes-polyamide thin film nanocomposite (TFN) membrane for forward osmosis (FO) application

Emadzadeh, Daryoush; Lau, Woei Jye; Rahbari‐Sisakht, Masoud; Ilbeygi, Hamid; Rana, Dipak; Matsuura, Takeshi; Ismail, Ahmad Fauzi

doi:10.1016/j.cej.2015.06.035

Cited by 149 publications

(57 citation statements)

References 48 publications

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“…The greater water production rate could be mainly due to the thin top PA selective layer (several hundreds of nanometers) which offers lower water transport resistance [18,21]. It is worth mentioning that the internal concentration polarization (ICP) is the main factor that impairs performance of the conventional TFC RO membranes in FO processes.…”

Section: Introductionmentioning

confidence: 99%

“…While FO process offers attractive benefits, limited number of commercially available high performance FO membranes has hampered the attempts to fully explore this method's potential for water recovery applications [18][19][20]. Flat sheet cellulose triacetate (CTA) FO membranes fabricated by Hydration Technologies Inc. (HTI) are the most popular membranes for water purification and reuse industries.…”

Section: Introductionmentioning

confidence: 99%

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Minimizing structural parameter of thin film composite forward osmosis membranes using polysulfone/halloysite nanotubes as membrane substrates

et al. 2016

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Minimizing structural parameter of thin film composite forward osmosis membranes using polysulfone/halloysite nanotubes as membrane substrates

et al. 2016

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“…TFN membranes always achieve greater water production rate compared to TFC membrane irrespective of the solution that was used to disperse nanofillers. The improved water productivity as observed in TFNaq-or TFNcyclomembrane might be attributed to the presence of abundant hydroxyl groups (average 5.8 -OH/nm 2 ) at the TNT surface and its narrow channels (several tens of nanometers) that provide smooth transport pathway for water to pass through [14,25]. FESEM images shown in Figure 3 reveal that some of the incorporated nanotubes would be exposed to the membrane surface which makes the hydrophilic nanotubes accountable for the increased membrane hydrophilicity to some extent.…”

Section: Fesem-edx-afmmentioning

confidence: 99%

“…The main objective of the work was to compare the efficiency of approaches used in preparing PA TFN membrane for water/wastewater treatment process. Titanate nanotube (TNT) was selected as the nanofiller owing to its hydrophilic properties and large surface area, as well as the existence of narrow channel that might promote water transport through the membrane [13][14]. To improve the dispersion quality of TNT in organic solution, silane agent was used to modify the surface of TNT.…”

Section: Introductionmentioning

confidence: 99%

A practical approach to synthesize polyamide thin film nanocomposite (TFN) membranes with improved separation properties for water/wastewater treatment

et al. 2016

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Thin film nanocomposite (TFN) membranes containing 0.05 or 0.10 w/v% functionalized titanate nanotubes (TNTs) in polyamide selective layer were prepared via interfacial polymerization of piperazine (PIP) and trimesoyl chloride (TMC) monomers. Nanomaterials were dispersed into the monomer solution using two different approaches. In the first one, the functionalized TNTs were dispersed into the amine aqueous solution, while in the second approach the same nanomaterials were dispersed in TMC organic solution. The TFN membranes were characterized and compared with a control thin film composite (TFC) membrane to investigate the effect of nanofiller loadings and the fabrication approach on membrane properties. Results showed that introducing nanofillers into the organic phase was more effective to synthesize a TFN membrane of greater separation performance as the use of rubber roller to remove aqueous solution from the substrate surface could cause the loss of a significant amount of nanofillers, which further affected the polyamide layer integrity. It was also found that incorporation of high nanofiller loading tended to interfere with interfacial polymerization and weaken the bonds between monomers blocks, resulting in poor polyamide-nanotubes integrity. Compared to the TFC membrane, the TFN membrane made of 2% PIP and 0.15% TMC with 0.5% nanofiller incorporation could achieve greater water flux (7.5 vs 5.4 L/m 2 .h.bar) and Na2SO4 rejection (96.4% vs 86%) while exhibiting higher resistance against the fouling by protein and dye.

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“…In particular, titanate nanotubes have received a great deal of attention because of large surface area that leads to a wide variety of applications, including secondary lithium batteries, dye sensitized solar cells, catalysts and bio-composite [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Thermal Stability on Morphology and Crystal Structures of Hydrothermally Synthesized Titanate Nanotubes and Their Photocatalytic Activity

Razali¹,

Osman²,

Rozaini³

et al. 2017

Asian J. Chem.

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Thermal stability on morphology and crystal structure of hydrothermally synthesized titanates nanotubes was investigated. Morphology study by FESEM and TEM revealed that the synthesized titanate nanotubes retained up to 500 °C before converted into nanowires and nanorods at 600 and 700 °C, respectively. The crystal structure of sodium trititanate nanotubes remained unchanged upon thermal treatment from 300 to 500 °C. However at 600 and 700 °C, the interlayer titanate in sodium trititanate samples undergo dimerization like process leading to the formation of an intermediate nanostructured hexatitanate, just before transformed into the corresponding anatase TiO2 crystals. Titanate nanotubes either trititanate or hexatitanate show low photocatalytic activity for methyl orange degradation due to their inter-layered crystal structure.

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Synthesis, modification and optimization of titanate nanotubes-polyamide thin film nanocomposite (TFN) membrane for forward osmosis (FO) application

Cited by 149 publications

References 48 publications

Minimizing structural parameter of thin film composite forward osmosis membranes using polysulfone/halloysite nanotubes as membrane substrates

Minimizing structural parameter of thin film composite forward osmosis membranes using polysulfone/halloysite nanotubes as membrane substrates

A practical approach to synthesize polyamide thin film nanocomposite (TFN) membranes with improved separation properties for water/wastewater treatment

Thermal Stability on Morphology and Crystal Structures of Hydrothermally Synthesized Titanate Nanotubes and Their Photocatalytic Activity

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