Synthesis of ordered mesoporous carbon thin films at various temperatures in vapor infiltration method

Kataoka, Sho; Yamamoto, Takuji; Inagi, Yuki; Endo, Akira; Nakaiwa, Masaru; Ohmori, Takao

doi:10.1016/j.carbon.2008.05.014

Cited by 12 publications

(10 citation statements)

References 8 publications

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“…Besides the ratio between the amounts of precursor and template various other synthesis parameters also affect the final pore morphology of mesoporous carbons. [45][46][47][48][49][50][51][52][53] Tanaka et al 46 demonstrated the importance of the solution composition: carbon powders were synthesized from resorcinol-phloroglucinol/formaldehyde and F127 dissolved in different amounts of ethanol and water. A three dimensional wormhole-like mesostructure was formed with EtOH/water ratios in the range of 0.5 to 1.25.…”

Section: Typical Examples For the Synthesis Of Micelle-templated Meso...mentioning

confidence: 99%

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Recent progress in soft-templating of porous carbon materials

2012

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Mesoporous carbons synthesized via a soft-templating approach have attracted much attention due to their easy synthesis and facile control over the derived pore structure. In analogy to soft-templating approaches for mesoporous metal oxides, their synthesis is based on a sequence of forming supramolecular arrangements of precursor molecules with the soft templates, stabilization of the precursor framework by polymerization and finally the removal of the templates. Using micelles of amphiphilic block-copolymers as templates, facile control over the morphology and size of mesopores can be achieved by e.g. controlling size, composition, and concentration of the template polymers or composition and degree of polymerization of the precursor. Moreover, soft templating approaches can be extended to obtain also carbon materials with hierarchical meso-and macroporosity. The additional macroporosity either can result from templating by polymer latex or is induced via macrophase separation. In this review, we describe recent progress and examples in the synthesis and application of mesoporous carbon materials based on soft-templating approaches. Moreover, we reiterate fundamental principles of self-aggregation, highlight proposed synthesis mechanisms and present means of controlling pore size, also in hierarchical meso-macroporous carbon materials.

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Section: Typical Examples For the Synthesis Of Micelle-templated Meso...mentioning

confidence: 99%

“…, h-PS 49 ) as a ''pore expander'' using resol as a carbon precursor and THF as a solvent. 63 EISA was employed for film casting.…”

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confidence: 99%

Recent progress in soft-templating of porous carbon materials

2012

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“…Control of the size, order, orientation, and specific topology of mesopores within carbon thin films has been the focus of extensive study, owing to their potential for applications as diverse as electrodes, catalyst supports, membranes, and adsorbents, among others. − So-called “soft-templating” strategies ,− that exploit the self-assembly phase behavior of copolymer surfactants as templates and polymerizable carbon precursors have been demonstrated to enable realization of ordered mesoporous carbon films. ,− The hallmark of “soft templating” is its intrinsic scalability owing to its reliance on “one-pot” solution phase thermodynamics for the realization of carbon films of a range of pore topologies. Yet, this approach faces drawbacks, including the cost of sacrificial surfactants or polymer blocks, pore shrinkage during template removal, − , challenges associated with pore orientation parallel rather than perpendicular to the surface of the film, ,, and long-range ordering , of large mesopores without the addition of low-volatility solvents …”

Section: Introductionmentioning

confidence: 99%

Nanocasting of Carbon Films with Interdigitated Bimodal Three-Dimensionally Ordered Mesopores by Template-Replica Coassembly

Tian

Snyder

2014

Langmuir

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Carbon films with interdigitated bimodal three-dimensionally ordered mesoporosity (ib3DOm) are realized by a scalable nanoreplication process that removes the common need plaguing hard-templating strategies for multistep prefabrication of porous sacrificial templates. Specifically, evaporation-induced convective codeposition of size-tunable (ca. 20-50 nm) silica nanoparticles with a surrogate molecular carbon precursor (glucose), followed by carbonization and template etching, leads to remarkably ordered, crack-free mesoporous carbon films of tunable thickness (ca. 100-1000 nm) and pore size. Association of the molecular carbon precursor with the assembling pore forming particles is found to transition the system among three distinct film morphologies (collapsed, ib3DOm C, disordered), thereby establishing a pseudophase behavior controlled by silica solids content and incipient glucose concentration. Namely, a parametric window wherein ib3DOm C films can be realized is identified, with a diffuse lower phase boundary associated with collapsing carbon films, and a more distinct order-to-disorder transition encountered at higher glucose concentrations. Mechanistic insight suggests that glucose association with the lysine-silica nanoparticle surface modulates the lattice spacing, d, of the periodically ordered mesopores in the coassembled films, with the onset of the order-to-disorder transition occurring at a critical normalized lattice spacing, dc/D ∼ 1.16. This appears to apply across the phase space associated with D = 50 nm silica particles and to translate among other phase spaces associated with smaller particles (e.g., 30 nm). We briefly demonstrate the robustness of the codeposition process for realizing ib3DOm C films on rough FTO glass substrates and show that, in this form, these materials hold potential as low-cost alternatives to costly platinum electrodes for dye-sensitized solar cells.

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“…Besides, inducing a pattern, AAO templates with CNTs might be used also as hybrid structures. Similar AAO/CNT hybrid structures have been showed to have potential in the following applications such as membrane [24], catalyst support [25], drug delivery [26][27][28] and field emitters [29].…”

Section: Introductionmentioning

confidence: 99%

Growth of vertically aligned carbon nanotubes over self-ordered nano-porous alumina films and their surface properties

Rana

Kucukayan-Dogu

Bengu

2012

Applied Surface Science

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Nanoporous anodic aluminum oxide (AAO) with self-organized arrays of uniform nanopores have been used for various applications in the fields of sensing, storage, separation and template-based fabrication of metal nanowires, carbon nanotubes, oxides and polymers. The work presented here involves the production and use of AAO templates for growth of aligned multi walled carbon nanotube arrays. AAO templates were formed by electrochemical oxidation of aluminum in different electrolyte solutions containing sulfuric, oxalic and phosphoric acid. SEM was used for the analysis of the surface morphology of the AAO films. The porous structures with pore size in the range of 25-120 nm were observed. Pore sizes were correlated with the type of acidic solutions used as the electrolyte. Finally, AAO surfaces have been used as substrates for the growth of vertically aligned carbon nanotubes through chemical vapor deposition technique, which showed super-hydrophobic behavior as confirmed by contact angle measurements. © 2012 Elsevier B.V

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Synthesis of ordered mesoporous carbon thin films at various temperatures in vapor infiltration method

Cited by 12 publications

References 8 publications

Recent progress in soft-templating of porous carbon materials

Recent progress in soft-templating of porous carbon materials

Nanocasting of Carbon Films with Interdigitated Bimodal Three-Dimensionally Ordered Mesopores by Template-Replica Coassembly

Growth of vertically aligned carbon nanotubes over self-ordered nano-porous alumina films and their surface properties

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