Supramolecular Aggregates as Templates: Ordered Mesoporous Polymers and Carbons

Wan, Ying; Shi, Yifeng; Zhao, Dongyuan

doi:10.1021/cm7024125

Cited by 423 publications

(312 citation statements)

References 98 publications

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“…The DTG curve (Fig. 8, inset) also confi rms that the temperature range of decomposition of HPCM-2-130 is coincident with O stretching modes and that around 2900 cm 1 to C H stretching modes of F127 and PU foam [30,32].…”

Section: Nano Researchsupporting

confidence: 54%

Facile fabrication of hierarchically porous carbonaceous monoliths with ordered mesostructure via an organic organic self-assembly

2009

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A simple strategy for the synthesis of macro-mesoporous carbonaceous monolith materials has been demonstrated through an organic organic self-assembly at the interface of an organic scaffold such as polyurethane (PU) foam. Hierarchically porous carbonaceous monoliths with cubic (Im m) or hexagonal (p6mm) mesostructure were prepared through evaporation induced self-assembly of the mesostructure on the three-dimensional (3-D) interconnecting struts of the PU foam scaffold. The preparation was carried out by using phenol/formaldehyde resol as a carbon precursor, triblock copolymer F127 as a template for the mesostructure and PU foam as a sacrificial monolithic scaffold. Their hierarchical pore system was macroscopically fabricated with cable-like mesostructured carbonaceous struts. The carbonaceous monoliths exhibit macropores of diameter 100 450 μm, adjustable uniform mesopores (3.8 7.5 nm), high surface areas (200 870 m 2 /g), and large pore volumes (0.17 0.58) cm 3 /g. Compared with the corresponding evaporation induced self-assembly (EISA) process on a planar substrate, this facile process is a time-saving, labor-saving, space-saving, and highly effi cient pathway for mass production of ordered mesoporous materials.

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Section: Nano Researchsupporting

confidence: 54%

Facile fabrication of hierarchically porous carbonaceous monoliths with ordered mesostructure via an organic organic self-assembly

2009

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“…This can be achieved by selecting carbon precursors containing a large number of hydroxyl groups (-OH), 17,18,24 which can strongly interact with the polar parts of structure-directing block-copolymers. Furthermore, precursor aggregates should be small enough to enable assembly around micelles.…”

Section: Key Issues For the Successful Synthesismentioning

confidence: 99%

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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“…By using calcinations, these templates were removed effectively, but mesoporous would be easy to collapse. In order to synthesizing stable mesoporous materials or hard skeletal scaffolds, Zhao and coworkers used sol-phenolic resin [12][13][14], which could remain the mesopores structures after the polycondensation, as a ideal hard template. Hence mesoporous metal oxides [13], carbon materials [14] and their composites could be synthesized.…”

Section: Introductionmentioning

confidence: 99%

The characterizations and electrochemical properties of lignosulfonate templates based mesoporous NiO

Chen¹,

Yao²,

Ping³

et al. 2013

AIP Conference Proceedings

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Abstract. Environmentally recycled liginsulfonate were successfully employed for the facile synthesis of mesoporous NiO materials. The XRD, SEM, TEM and N 2 adsorption-desorption analysis were performed for characterizing the structure and surface properties of resultant NiO. The proximate globular structure of lignin macromolecules played an templating role in the formation of mesoporous framework of NiO. The fabricated NiO nanostructures had high specific surface area (193.8 m 2 /g), large pore volume (0.42 cm 3 /g), and narrow pore size distribution making them ideal candidates for supercapacitor applications. CV, ESI and galvanostatic constant-current charge/discharge tests showed that the fabricated mesoporous NiO had high specific capacitance (342 F·g −1 ) and good circulatory stability. Furthermore, the mesoporous NiO showed a good rate capability, which is due to that the ordered mesopores did not limit the ion motion within the pores. The results suggest that resultant NiO mesostructures are a promising supercapacitor electrode material.

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Supramolecular Aggregates as Templates: Ordered Mesoporous Polymers and Carbons

Cited by 423 publications

References 98 publications

Facile fabrication of hierarchically porous carbonaceous monoliths with ordered mesostructure via an organic organic self-assembly

Facile fabrication of hierarchically porous carbonaceous monoliths with ordered mesostructure via an organic organic self-assembly

Recent progress in soft-templating of porous carbon materials

The characterizations and electrochemical properties of lignosulfonate templates based mesoporous NiO

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