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No More HF: Teflon-Assisted Ultrafast Removal of Silica to Generate High-Surface-Area Mesostructured Carbon for Enhanced CO2 Capture and Supercapacitor Performance

Singh, Dheeraj Kumar and Krishna, Katla Sai and Harish, Srinivasan and Sampath, Srinivasan and Eswaramoorthy, Muthusamy (2016) No More HF: Teflon-Assisted Ultrafast Removal of Silica to Generate High-Surface-Area Mesostructured Carbon for Enhanced CO2 Capture and Supercapacitor Performance. In: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 55 (6). pp. 2032-2036.

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Official URL: http://dx.doi.org/10.1002/anie.201509054

Abstract

An innovative technique to obtain high-surface-area mesostructured carbon (2545m(2)g(-1)) with significant microporosity uses Teflon as the silica template removal agent. This method not only shortens synthesis time by combining silica removal and carbonization in a single step, but also assists in ultrafast removal of the template (in 10min) with complete elimination of toxic HF usage. The obtained carbon material (JNC-1) displays excellent CO2 capture ability (ca. 26.2wt% at 0 degrees C under 0.88bar CO2 pressure), which is twice that of CMK-3 obtained by the HF etching method (13.0wt%). JNC-1 demonstrated higher H-2 adsorption capacity (2.8wt%) compared to CMK-3 (1.2wt%) at -196 degrees C under 1.0bar H-2 pressure. The bimodal pore architecture of JNC-1 led to superior supercapacitor performance, with a specific capacitance of 292Fg(-1) and 182Fg(-1) at a drain rate of 1Ag(-1) and 50Ag(-1), respectively, in 1m H2SO4 compared to CMK-3 and activated carbon.

Item Type: Journal Article
Publication: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Publisher: WILEY-V C H VERLAG GMBH
Additional Information: Copy right for this article belongs to the WILEY-V C H VERLAG GMBH, POSTFACH 101161, 69451 WEINHEIM, GERMANY
Keywords: gas storage; ordered mesoporous carbons; silica; supercapacitors; Teflon
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 02 Apr 2016 11:35
Last Modified: 02 Apr 2016 11:35
URI: http://eprints.iisc.ac.in/id/eprint/53478

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