title: No More HF: Teflon-Assisted Ultrafast Removal of Silica to Generate High-Surface-Area Mesostructured Carbon for Enhanced CO2 Capture and Supercapacitor Performance.
abstract: An innovative technique to obtain high-surface-area mesostructured carbon (2545 m(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 10 min) with complete elimination of toxic HF usage. The obtained carbon material (JNC-1) displays excellent CO2 capture ability (ca. 26.2 wt % at 0 °C under 0.88 bar CO2 pressure), which is twice that of CMK-3 obtained by the HF etching method (13.0 wt %). JNC-1 demonstrated higher H2 adsorption capacity (2.8 wt %) compared to CMK-3 (1.2 wt %) at -196 °C under 1.0 bar H2 pressure. The bimodal pore architecture of JNC-1 led to superior supercapacitor performance, with a specific capacitance of 292 F g(-1) and 182 F g(-1) at a drain rate of 1 A g(-1) and 50 A g(-1) , respectively, in 1 m H2 SO4 compared to CMK-3 and activated carbon.
authors.affiliation: Nanomaterials and Catalysis Lab, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P.O., Bengaluru, 560064, India.
authors.forename: Dheeraj Kumar
authors.initials: DK
authors.lastname: Singh
authors.affiliation: Nanomaterials and Catalysis Lab, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P.O., Bengaluru, 560064, India.
authors.forename: Katla Sai
authors.initials: KS
authors.lastname: Krishna
authors.affiliation: Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bengaluru, 560012, India.
authors.forename: Srinivasan
authors.initials: S
authors.lastname: Harish
authors.affiliation: Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bengaluru, 560012, India.
authors.forename: Srinivasan
authors.initials: S
authors.lastname: Sampath
authors.affiliation: Nanomaterials and Catalysis Lab, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P.O., Bengaluru, 560064, India. eswar@jncasr.ac.in.
authors.forename: Muthusamy
authors.initials: M
authors.lastname: Eswaramoorthy
keywords: Teflon; gas storage; ordered mesoporous carbons; silica; supercapacitors