Relationship between crosslinking and ordering kinetics for the fabrication of soft templated (FDU-16) mesoporous carbon thin films

Zhang, Yuanzhong; Qiang, Zhe; Vogt, Bryan D.

doi:10.1039/c4ra08316d

Cited by 18 publications

(25 citation statements)

References 36 publications

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“…For OMC powders fabricated with Pluronic and resol, 120 °C has been reported as the optimal crosslinking temperature [38]. However, the silica in the framework will assist in stabilizing the structure [32], so a lower temperature may improve the ordering similar to a prior report using a two stage crosslinking process where initially 100 °C is used to promote the ordering, followed by a much higher temperature (150 °C) to crosslink the resol [37]. This competition between ordering and crosslinking likely provides the origins of the bestordered structure for OMC-2.5-5-100.…”

Section: Role Of Crosslinking Temperature On Porous Structurementioning

confidence: 93%

“…6C). This suggests that the mesostructure evolves during crosslinking as the resol will be more crosslinked at higher temperatures [37]. SAXS measurements provide a route to better understand these differences as shown in Fig.…”

Section: Role Of Crosslinking Temperature On Porous Structurementioning

confidence: 99%

“…For these materials, the crosslinking temperature controls the relative rate of ordering and crosslinking [38]. At lower temperatures, the crosslinking reaction is sufficiently slow and does not impact ordering, but the crosslinking extent is lower and does not fully stabilize the mesostructure through carbonization [37]. At high temperatures, the resol crosslinks too fast for a well ordered mesostructure to develop.…”

Section: Role Of Crosslinking Temperature On Porous Structurementioning

confidence: 99%

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Roll-to-roll fabrication of high surface area mesoporous carbon with process-tunable pore texture for optimization of adsorption capacity of bulky organic dyes

Qiang

Gurkan

et al. 2016

Microporous and Mesoporous Materials

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Large-scale (multigram-to-kilogram) fabrication of soft-templated ordered mesoporous carbons (OMC) is enabled by roll-to-roll (R2R) processing via evaporation induced self assembly of Pluronic F127, oligomeric phenolic resin (resol), and tetraorthosilicate (TEOS) from ethanolic solution. The solution concentration, TEOS loading (etchable for microporous framework), and crosslinking temperature impact the pore structure. Here we demonstrate that mesoporous carbons with surface areas up to 2455 m 2 /g can be obtained under the proper processing conditions. Transmission electron microscopy (TEM), smallangle X-ray scattering (SAXS) and nitrogen adsorption-desorption isotherms reveal (i) supressed framework shrinkage with increasing solution concentration during casting, (ii) improved long range order and higher surface area with increasing TEOS content up to 3:1 TEOS:resol, and (iii) enhanced porosity with crosslinking at 100 ᵒC. These differences can be © 2016. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/ 2 explained on the basis of block copolymer thermodynamics and mechanical reinforcement by silica. This family of OMCs are effective adsorbents for bulky aqueous organic dyes, such as methylene green (MG) and methyl blue (MB), with high adsorption capacities of 0.436 g MG/g OMC and 0.378 g MB/g OMC obtained. This R2R method provides a facile method to generate significant quantities of OMCs with tunable pore textures.

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Section: Role Of Crosslinking Temperature On Porous Structurementioning

confidence: 93%

Section: Role Of Crosslinking Temperature On Porous Structurementioning

confidence: 99%

Section: Role Of Crosslinking Temperature On Porous Structurementioning

confidence: 99%

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Roll-to-roll fabrication of high surface area mesoporous carbon with process-tunable pore texture for optimization of adsorption capacity of bulky organic dyes

Qiang

Gurkan

et al. 2016

Microporous and Mesoporous Materials

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“…Then, HCP-PS was chemically and thermally activated, producing a highly porous carbonaceous material, named KPS-1. Analogous procedures were recently employed to prepare porous carbons from HCP [36,37,38,39,40]. We have also followed this approach in the past starting from tetraphenylmethane, testing different reaction conditions to optimize the textural properties of the products [31,41,42].…”

Section: Introductionmentioning

confidence: 99%

A Porous Carbon with Excellent Gas Storage Properties from Waste Polystyrene

et al. 2019

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In this paper, we describe the synthesis and gas adsorption properties of a porous carbonaceous material, obtained from commercial expanded polystyrene. The first step consists of the Friedel-Craft reaction of the dissolved polystyrene chains with a bridging agent to form a highly-crosslinked polymer, with permanent porosity of 0.7 cm3/g; then, this polymer is treated with potassium hydroxide at a high temperature to produce a carbon material with a porous volume larger than 1.4 cm3/g and a distribution of ultramicro-, micro-, and mesopores. After characterization of the porous carbon and determination of the bulk density, the methane uptake was measured using a volumetric apparatus to pressures up to 30 bar. The equilibrium adsorption isotherm obtained is among the highest ever reported for this kind of material. The interest of this product lies both in its excellent performance and in the virtually costless starting material.

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“…They are highly stable both mechanically and hydrothermally [6,7]. In addition, nanocast carbons exhibit large surface areas and pore volumes, as well as uniform pore sizes [8][9][10]. Several researchers proved the effectivity of OMC in removal of heavy metals from water [11,12].…”

Section: Introductionmentioning

confidence: 99%

Modeling of Copper Adsorption on Mesoporous Carbon CMK-3: Response Surface Design

2018

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CMK-3 mesoporous carbon was nanocast from SBA-15 silica. The obtained carbon was characterized by nitrogen sorption isotherms, X-ray diffraction and transmission electron microscopy (TEM). The batch adsorption tests were done at constant pH taking into account the initial metal ion concentration, adsorbent mass and temperature. A statistical study using a response surface design method was done to develop a mathematical model to predict copper adsorption on CMK-3 as a function of the mentioned experimental factors. It was found that all these parameters are significant, and copper concentration has the greatest effect on adsorption among them. Moreover, the obtained model proved to be adequate in predicting copper adsorption on CMK-3 and its performance under different experimental conditions.

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Relationship between crosslinking and ordering kinetics for the fabrication of soft templated (FDU-16) mesoporous carbon thin films

Cited by 18 publications

References 36 publications

Roll-to-roll fabrication of high surface area mesoporous carbon with process-tunable pore texture for optimization of adsorption capacity of bulky organic dyes

Roll-to-roll fabrication of high surface area mesoporous carbon with process-tunable pore texture for optimization of adsorption capacity of bulky organic dyes

A Porous Carbon with Excellent Gas Storage Properties from Waste Polystyrene

Modeling of Copper Adsorption on Mesoporous Carbon CMK-3: Response Surface Design

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