TY - JOUR
T1 - Amidoxime-functionalized microcrystalline cellulose-mesoporous silica composites for carbon dioxide sorption at elevated temperatures
AU - Gunathilake, Chamila
AU - Dassanayake, Rohan S.
AU - Abidi, Noureddine
AU - Jaroniec, Mietek
N1 - Publisher Copyright:
© The Royal Society of Chemistry 2016.
PY - 2016
Y1 - 2016
N2 - Amidoxime-functionalized microcrystalline cellulose (MCC)-mesoporous silica composites were prepared for the first time by a two-step process. First, microcrystalline cellulose (MCC)-mesoporous silica with cyanopropyl groups (MCC-CP) was obtained by solvent evaporation-induced self-assembly of MCC, tetraethylorthosilicate, and (3-cyanopropyl)triethoxysilane in the presence of a Pluronic P123 triblock copolymer under acidic conditions. In the next step, the resulting material was treated with hydroxylamine hydrochloride to convert cyanopropyl groups into amidoxime functionalities to obtain a mesoporous MCC-AO composite. A series of MCC-CP and MCC-AO samples was examined for CO2 sorption at ambient (25 °C) and elevated (120 °C) temperatures. While the MCC-CP and MCC-AO samples showed relatively low CO2 uptake under ambient conditions, they performed very well at elevated temperatures (120 °C) reaching CO2 sorption capacities of 2.15-2.41 mmol g-1 (MCC-CP) and 2.84-3.85 mmol g-1 (MCC-AO). The CO2 sorption capacity of MCC-AO at 120 °C exceeds the values reported so far for many other sorbents, which makes this material attractive for CO2 capture in addition to its biocompatibility, biodegradability, non-toxicity, low cost, cycle stability, and good thermal and mechanical stability.
AB - Amidoxime-functionalized microcrystalline cellulose (MCC)-mesoporous silica composites were prepared for the first time by a two-step process. First, microcrystalline cellulose (MCC)-mesoporous silica with cyanopropyl groups (MCC-CP) was obtained by solvent evaporation-induced self-assembly of MCC, tetraethylorthosilicate, and (3-cyanopropyl)triethoxysilane in the presence of a Pluronic P123 triblock copolymer under acidic conditions. In the next step, the resulting material was treated with hydroxylamine hydrochloride to convert cyanopropyl groups into amidoxime functionalities to obtain a mesoporous MCC-AO composite. A series of MCC-CP and MCC-AO samples was examined for CO2 sorption at ambient (25 °C) and elevated (120 °C) temperatures. While the MCC-CP and MCC-AO samples showed relatively low CO2 uptake under ambient conditions, they performed very well at elevated temperatures (120 °C) reaching CO2 sorption capacities of 2.15-2.41 mmol g-1 (MCC-CP) and 2.84-3.85 mmol g-1 (MCC-AO). The CO2 sorption capacity of MCC-AO at 120 °C exceeds the values reported so far for many other sorbents, which makes this material attractive for CO2 capture in addition to its biocompatibility, biodegradability, non-toxicity, low cost, cycle stability, and good thermal and mechanical stability.
UR - http://www.scopus.com/inward/record.url?scp=84961990523&partnerID=8YFLogxK
U2 - 10.1039/c6ta00261g
DO - 10.1039/c6ta00261g
M3 - Article
AN - SCOPUS:84961990523
SN - 2050-7488
VL - 4
SP - 4808
EP - 4819
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 13
ER -