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Control of Porosity by Using Isoreticular Zeolitic Imidazolate Frameworks (IRZIFs) as a Template for Porous Carbon Synthesis
Author(s) -
Pachfule Pradip,
Biswal Bishnu P.,
Banerjee Rahul
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201200957
Subject(s) - porosity , microporous material , imidazolate , zeolitic imidazolate framework , bet theory , adsorption , carbon fibers , materials science , chemical engineering , furfuryl alcohol , texture (cosmology) , specific surface area , metal organic framework , nuclear chemistry , chemistry , inorganic chemistry , catalysis , organic chemistry , composite material , composite number , image (mathematics) , artificial intelligence , computer science , engineering
Herein, by using isoreticular zeolitic imidazolate frameworks (IRZIFs) as a template, we report the synthesis, morphology, and gas adsorption properties of porous carbon synthesized by a nanocasting method at 1000 °C, in which furfuryl alcohol (FA) was used as a carbon source. By using IRZIFs with variable porosity as templates, we could achieve control over the carbon porosity and H 2 and CO 2 uptake. The resultant microporous carbon C‐70, synthesized by using ZIF‐70 as the template, is the most porous (Brunauer–Emmett–Teller (BET) surface area 1510 m 2 g −1 ). Carbon C‐68, synthesized by using ZIF‐68, has moderate porosity (BET surface area 1311 m 2 g −1 ), and C‐69, synthesized by using ZIF‐69, has the lowest porosity in this series (BET surface area 1171 m 2 g −1 ). The porous carbons C‐70, C‐68, and C‐69, which have graphitic texture, have promising H 2 uptake capacities of 2.37, 2.15, and 1.96 wt %, respectively, at 77 K and 1 atm. Additionally, C‐70, C‐68, and C‐69 show CO 2 uptake capacities of 5.45, 4.98, and 4.54 mmol g −1 , respectively, at 273 K and 1 atm. The gas uptake trends shown by C‐70, C‐68, and C‐69 clearly indicate the dependence of carbon porosity on the host template. Moreover, the as‐synthesized carbons C‐70, C‐68, and C‐69 show variable conductivity.