Cyclophosphazene-Based Hybrid Nanoporous Materials as Superior Metal-Free Adsorbents
for Gas Sorption Applications
Version 2 2018-02-20, 21:05
Version 1 2018-02-20, 21:03
Posted on 2018-02-20 - 21:05
Cyclophosphazene-based
inorganic–organic hybrid nanoporous
materials (CHNMs) have been synthesized by a facile solvothermal method.
The condensation of pyrrole with the reaction product of phosphonitrilic
chloride trimer and 4-hydroxybenzaldehyde resulted in the formation
of high-surface-area CHNMs. The maximum specific surface area (SABET) of 1328 m2 g–1 with hierarchical
pore structures having
micropores centered at 1.18 nm and mesopores in the range of 2.6–3.6
nm was estimated from the N2 sorption analysis. Observation
of high SABET could be attributed to the synergy effect
exerted by the cyclophosphazene moiety owing to its three-dimensional
paddle wheel structure. The metal-free adsorbent exhibited a high
and reversible CO2 uptake of 22.8 wt % at 273 K and 1 bar.
The performance is on the higher side among the reported metal-free
inorganic–organic hybrid nanoporous adsorbents. Moreover, the
high H2 uptake of 2.02 wt % at 77 K and 1 bar is an added
advantage. The superior performance of the adsorbents for the gas
sorption applications could be attributed to the combined effect of
high SABET and hierarchical pore structure, which has made
CHNMs good candidates for energy and environmental applications.
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Muhammad, Raeesh; Mohanty, Paritosh (2018). Cyclophosphazene-Based Hybrid Nanoporous Materials as Superior Metal-Free Adsorbents
for Gas Sorption Applications. ACS Publications. Collection. https://doi.org/10.1021/acs.langmuir.7b03263
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AUTHORS (2)
RM
Raeesh Muhammad
PM
Paritosh Mohanty
KEYWORDS
H 2 uptakeCHNMN 2 sorption analysisporeSuperior Metal-Free AdsorbentsSA BETwtpaddle wheel structureCyclophosphazene-Based Hybrid Nanoporous MaterialsCO 2 uptakephosphonitrilic chloride trimernanoporou1 barnmperformanceadsorbentGas Sorption Applications Cyclophosphazene-basedmetal-freegas sorption applications