Synthesis and characterisation of carbon nanotube modified anodised alumina membranes

Vermisoglou, Eleni C.; Pilatos, G.; Romanos, Georgios E.; Karanikolos, Georgios N.; Boukos, N.; Mertis, Konstantinos; Kakizis, N.K.; Kanellopoulos, N.K.

doi:10.1016/j.micromeso.2007.08.001

Cited by 29 publications

(22 citation statements)

References 29 publications

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“…Among various templates, anodic aluminium oxide (AAO) is one of the most commonly used templates for CNTs growth [59,60,61,62,63,64]. Briefly, AAO templates were initially fabricated by electrochemical anodization process.…”

Section: Fabrication Methods Of Cnts-based Composite Membranesmentioning

confidence: 99%

“…Similarly, vertically aligned CNTs were implanted in the AAO template through CVD with acetylene and nickel severing as carbon source and catalyst, respectively (as shown in Figure 7). The developed composite membranes were examined by adsorption and relative permeability, giving an insight on the factors affecting CNTs growth [59]. …”

Section: Fabrication Methods Of Cnts-based Composite Membranesmentioning

confidence: 99%

“…( a ) SEM image of the AAO template and ( b ) cross-sectional SEM image of the vertically aligned CNTs-AAO [59]. …”

Section: Figurementioning

confidence: 99%

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Fabrication and Water Treatment Application of Carbon Nanotubes (CNTs)-Based Composite Membranes: A Review

et al. 2017

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Membrane separation technology is widely explored for various applications, such as water desalination and wastewater treatment, which can alleviate the global issue of fresh water scarcity. Specifically, carbon nanotubes (CNTs)-based composite membranes are increasingly of interest due to the combined merits of CNTs and membrane separation, offering enhanced membrane properties. This article first briefly discusses fabrication and growth mechanisms, characterization and functionalization techniques of CNTs, and then reviews the fabrication methods for CNTs-based composite membranes in detail. The applications of CNTs-based composite membranes in water treatment are comprehensively reviewed, including seawater or brine desalination, oil-water separation, removal of heavy metal ions and emerging pollutants as well as membrane separation coupled with assistant techniques. Furthermore, the future direction and perspective for CNTs-based composite membranes are also briefly outlined.

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Section: Fabrication Methods Of Cnts-based Composite Membranesmentioning

confidence: 99%

Section: Fabrication Methods Of Cnts-based Composite Membranesmentioning

confidence: 99%

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Fabrication and Water Treatment Application of Carbon Nanotubes (CNTs)-Based Composite Membranes: A Review

et al. 2017

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“…Che et al38 synthesized aligned CNTs by CVD using similar templates after introducing Ni, Fe, or Co catalyst particles into the pores by impregnation. Various research groups adopted this technique in order to study flow phenomena through the CNTs,8, 39–41 functionalize them,42, 43 or evaluate the separation performance of the CNT‐modified membranes 44…”

Section: Introductionmentioning

confidence: 99%

A Closer Look Inside Nanotubes: Pore Structure Evaluation of Anodized Alumina Templated Carbon Nanotube Membranes Through Adsorption and Permeability Studies

Pilatos

Vermisoglou

Romanos

et al. 2010

Adv Funct Materials

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Although hollow nanostructures, such as nanotubes, represent a major portion of nanoscaled materials with a tremendously large application range, a detailed evaluation of their internal characteristics still remains elusive. Transmission electron microscopy is the most common analytical technique to examine the internal configuration of these structures, yet it can only provide evidence of a minimal portion of the overall material, thus, it cannot be accurately generalized. In the present paper, in addition to electron microscopy and other spot‐size analysis methods (X‐ray diffraction, Raman spectroscopy, etc.), a combination of techniques including adsorption, permeability, and relative permeability are employed in order to provide important insights into various crucial details of the overall internal surface and hollow‐space characteristics of carbon nanotube (CNT) arrays and membranes. The CNT arrays are fabricated using anodized alumina as a template in a flow‐through chemical vapor deposition (CVD) reactor. This is the first systematic approach for investigating the internal configuration of template‐based CNT arrays in detail. Key findings are made for the customized optimization of the resulting nanotube membranes for a variety of applications, including separations, nanofluidics and nanoreactors, biological capturing and purification, and controlled drug delivery and release.

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“…Specifically, highly ordered pore arrays in the oxide films have been used for the fabrication of nano-rods and nano-tubes of oxides, metals, and semiconductors as well as carbon nano-tubes [1][2][3][4][5][6][7][8]. In these investigations, the whole surface of the aluminum specimens is anodized in oxalic, sulfuric, or phosphoric acid solution, and the oxide films with highly ordered pore arrays are used as templates to form the nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Growth of porous type anodic oxide films at micro-areas on aluminum exposed by laser irradiation

Kikuchi

Sakairi

Takahashi

2009

Electrochimica Acta

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Aluminum covered with pore-sealed anodic oxide films was irradiated with a pulsed Nd-YAG laser to remove the oxide film at micro-areas. The specimen was re-anodized for long periods to examine the growth of porous anodic oxide films at the area where substrate had been exposed by measuring current variations and morphological changes in the oxide during the re-anodizing. The chemical dissolution resistance of the pore-sealed anodic oxide films in an oxalic acid solution was also examined by measuring time-variations in rest potentials during immersion.The resistance to chemical dissolution of the oxide film became higher with increasing pore-sealing time and showed higher values at lower solution temperatures. During potentiostatic re-anodizing at five 35-µm wide and 4-mm long lines for 72 h after the film was removed the measured current was found to increase linearly with time. Semicircular columnar shaped porous type anodic oxide was found to form during the re-anodizing at the laser-irradiated area, and was found to grow radially, thus resulting in an increase in the diameter. After long re-anodizing, the central and top parts of the oxide protruded along the longitudinal direction of the laser-irradiated area. The volume expansion during re-anodizing resulted in the formation of cracks, parallel to the lines, in the oxide film formed during the first anodizing.

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Synthesis and characterisation of carbon nanotube modified anodised alumina membranes

Cited by 29 publications

References 29 publications

Fabrication and Water Treatment Application of Carbon Nanotubes (CNTs)-Based Composite Membranes: A Review

Fabrication and Water Treatment Application of Carbon Nanotubes (CNTs)-Based Composite Membranes: A Review

A Closer Look Inside Nanotubes: Pore Structure Evaluation of Anodized Alumina Templated Carbon Nanotube Membranes Through Adsorption and Permeability Studies

Growth of porous type anodic oxide films at micro-areas on aluminum exposed by laser irradiation

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