Ordered Mesoporous Polymers and Homologous Carbon Frameworks: Amphiphilic Surfactant Templating and Direct Transformation

Meng, Yu; Gu, Dong; Zhang, Fuqiang; Shi, Yifeng; Yang, Haifeng; Li, Zheng; Yu, Chengzhong; Tang, Bo; Zhao, Dongyuan

doi:10.1002/ange.200501561

Cited by 1,155 publications

(280 citation statements)

References 34 publications

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“…5(a) a), suggesting the presence of uniform mesopores. The H 1 hysteresis loop suggests that cylindrical channels are present [21]. A narrow pore size distribution with a mean value of 7.5 nm can also be calculated from the adsorption branch based on the BJH model ( Fig.…”

Section: Hexagonal Mesostructure Of Hpcm-2mentioning

confidence: 97%

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: Hexagonal Mesostructure Of Hpcm-2mentioning

confidence: 97%

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

2009

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“…0.4 g of the silica MCFs was dispersed in 20 mL of ethanol solution containing 1.0 g of a resol precursor prepared by the method reported previously (Fig. S-1 in the Electronic Supplementary Material) [28]. After stirring for 10 min at room temperature, the ethanol solvent was removed by evaporation.…”

Section: Control Experimentsmentioning

confidence: 99%

Facile synthesis of porous carbon nitride spheres with hierarchical three-dimensional mesostructures for CO2 capture

et al. 2010

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Porous carbon nitride (CN) spheres with partially crystalline frameworks have been successfully synthesized via a nanocasting approach by using spherical mesoporous cellular silica foams (MCFs) as a hard template, and ethylenediamine and carbon tetrachloride as precursors. The resulting spherical CN materials have uniform diameters of ca. 4 μm, hierarchical three-dimensional (3-D) mesostructures with small and large mesopores with pore diameters centered at ca. 4.0 and 43 nm, respectively, a relatively high BET surface area of ~550 m 2 /g, and a pore volume of 0.90 cm 3 /g. High-resolution transmission electron microscope (HRTEM) images, wide-angle X-ray diffraction (XRD) patterns, and Raman spectra demonstrate that the porous CN material has a partly graphitized structure. In addition, elemental analyses, X-ray photoelectron spectra (XPS), Fourier transform infrared spectra (FT-IR), and CO 2 temperature-programmed desorption (CO 2 -TPD) show that the material has a high nitrogen content (17.8 wt%) with nitrogen-containing groups and abundant basic sites. The hierarchical porous CN spheres have excellent CO 2 capture properties with a capacity of 2.90 mmol/g at 25 °C and 0.97 mmol/g at 75 °C , superior to those of the pure carbon materials with analogous mesostructures. This can be mainly attributed to the abundant nitrogen-containing basic groups, hierarchical mesostructure, relatively high BET surface area and stable framework. Furthermore, the presence of a large number of micropores and small mesopores also enhance the CO 2 capture performance, owing to the capillary condensation effect.

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“…[32]. In a typical synthesis, 30.50 g of phenol was mixed with 6.50 g of 20 wt.% NaOH aqueous solution under stirring, and 50.00 g of formaldehyde solution (37 wt.%) was then added.…”

Section: Preparation Of Precursorsmentioning

confidence: 99%

Synthesis, characterization, and catalytic application of highly ordered mesoporous alumina-carbon nanocomposites

Wang

et al. 2010

Nano Res.

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Highly ordered mesoporous carbon-alumina nanocomposites (OMCA) have been synthesized for the first time by a multi-component co-assembly method followed by pyrolysis at high temperatures. In this synthesis, resol phenol-formaldehyde resin (PF resin) and alumina sol were respectively used as the carbon and alumina precursors and triblock copolymer Pluronic F127 as the template. N 2 -adsorption measurements, X-ray diffraction, and transmission electron microscopy revealed that, with an increase of the alumina content in the nanocomposite from 11 to 48 wt.%, the pore size increased from 2.9 to 5.0 nm while the ordered mesoporous structure was retained. Further increasing the alumina content to 53 wt.% resulted in wormhole-like structures, although the pore size distribution was still narrow. The nanocomposite walls are composed of continuous carbon and amorphous alumina, which allows the ordered mesostructure to be well preserved even after the removal of alumina by HF etching or the removal of carbon by calcination in air. The OMCA nanocomposites exhibited good thermostability below 1000 °C ; at higher temperatures the ordered mesostructure partially collapsed, associated with a phase transformation from amorphous alumina into γ-Al 2 O 3 . OMCA-supported Pt catalysts exhibited excellent performance in the one-pot transformation of cellulose into hexitols thanks to the unique surface properties of the nanocomposite.

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Ordered Mesoporous Polymers and Homologous Carbon Frameworks: Amphiphilic Surfactant Templating and Direct Transformation

Cited by 1,155 publications

References 34 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

Facile synthesis of porous carbon nitride spheres with hierarchical three-dimensional mesostructures for CO2 capture

Synthesis, characterization, and catalytic application of highly ordered mesoporous alumina-carbon nanocomposites

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