TY - JOUR
T1 - Effect of surfactant on CO2 adsorption of APS-Grafted silica gel by one-pot process
AU - Lee, Chang Hun
AU - Jung, Hyunchul
AU - Jo, Dong Hyun
AU - Jeon, Sunbin
AU - Kim, Sung Hyun
N1 - Publisher Copyright:
© 2016 The Chemical Society of Japan.
Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2016/7
Y1 - 2016/7
N2 - (3-Aminopropyl)trimethoxysilane (APS)-silica gels were prepared by a one-pot process using sodium silicate as a lowcost source of silica. XRD and SEM analyses revealed that the APS-silica gels were particles with diameters of around 100? 200 nm. Furthermore, the introduction of amine groups was confirmed by FT-IR spectroscopy and CO2 uptake measurements. The adsorption properties of the gels were improved by addition of the surfactants hexadecyltrimethylammonium bromide (CTAB), Pluronic F127, and Pluronic P123, which acted as pore forming agents. Using Brunauer?Emmett?Teller (BET) analyses, we confirmed that both the surface area and pore volume were improved on addition of these surfactants. The larger surface area resulted in a greater number of amine groups being exposed on the outer surface of the APS-silica gels; therefore, CO2 uptake increased as the amount of surfactant used was increased. The APS-silica gels with F127 and P123 had pores from the porous particles with 5?11 nm diameters and gaps between particles, while the APS-silica gel with CTAB only had smaller pores from gaps between silica particles. These pore distribution differences resulted from the differences in the lengths of the surfactant hydrophobic chains, and the differences in pore sizes affected the CO2 uptake rates of the APS-silica gels. By comparison of the pore and CO2 uptake properties, we confirmed that P123 was a suitable surfactant for the preparation of APS-silica gel by a one-pot process using sodium silicate as the silica source.
AB - (3-Aminopropyl)trimethoxysilane (APS)-silica gels were prepared by a one-pot process using sodium silicate as a lowcost source of silica. XRD and SEM analyses revealed that the APS-silica gels were particles with diameters of around 100? 200 nm. Furthermore, the introduction of amine groups was confirmed by FT-IR spectroscopy and CO2 uptake measurements. The adsorption properties of the gels were improved by addition of the surfactants hexadecyltrimethylammonium bromide (CTAB), Pluronic F127, and Pluronic P123, which acted as pore forming agents. Using Brunauer?Emmett?Teller (BET) analyses, we confirmed that both the surface area and pore volume were improved on addition of these surfactants. The larger surface area resulted in a greater number of amine groups being exposed on the outer surface of the APS-silica gels; therefore, CO2 uptake increased as the amount of surfactant used was increased. The APS-silica gels with F127 and P123 had pores from the porous particles with 5?11 nm diameters and gaps between particles, while the APS-silica gel with CTAB only had smaller pores from gaps between silica particles. These pore distribution differences resulted from the differences in the lengths of the surfactant hydrophobic chains, and the differences in pore sizes affected the CO2 uptake rates of the APS-silica gels. By comparison of the pore and CO2 uptake properties, we confirmed that P123 was a suitable surfactant for the preparation of APS-silica gel by a one-pot process using sodium silicate as the silica source.
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U2 - 10.1246/bcsj.20160020
DO - 10.1246/bcsj.20160020
M3 - Article
AN - SCOPUS:84979207969
SN - 0009-2673
VL - 89
SP - 823
EP - 832
JO - Bulletin of the Chemical Society of Japan
JF - Bulletin of the Chemical Society of Japan
IS - 7
ER -