In Situ Growth of Self-Assembled ZIF-8–Aminoclay Nanocomposites with Enhanced
Surface Area and CO<sub>2</sub> Uptake
Anindita Chakraborty
Subhajit Laha
Kesavan Kamali
Chandrabhas Narayana
Muthusamy Eswaramoorthy
Tapas Kumar Maji
10.1021/acs.inorgchem.7b01601.s001
https://acs.figshare.com/articles/journal_contribution/In_Situ_Growth_of_Self-Assembled_ZIF-8_Aminoclay_Nanocomposites_with_Enhanced_Surface_Area_and_CO_sub_2_sub_Uptake/5293687
Self-assembly
of metal–organic framework (MOF) nanoparticles (NPs) with a
functional material can result in MOF nanocomposites having new and
advanced properties along with the fabrication of new nanoscopic structures.
However, such assembly of MOFs has not been realized to date. Here
we report self-assembled nanocomposites of the zeolitic imidazolate
framework (ZIF-8) and layered aminoclay (AC) for the first time, and
the ZIF-8@AC composites exhibit significantly enhanced adsorption
properties in comparison to those of pristine ZIF-8 nanoparticles.
Four different composites denoted as <b>ZIF-8@AC-1</b>, <b>ZIF-8@AC-2</b>, <b>ZIF-8@AC-3</b>, and <b>ZIF-8@AC-4</b> were synthesized by varying the clay content, and their AC contents
were found to be 12.1, 18.3, 22.2, and 27.2 wt %, respectively. The
composites were thoroughly characterized by PXRD, FTIR, Raman, and
various microscopic techniques (FESEM, TEM, and STEM). The formation
of the composites is driven by the specific interaction between unsaturated
Zn(II) sites of ZIF-8 nanoparticles and NH<sub>2</sub> groups of the
aminoclay, which was validated from ζ potential and Raman spectroscopic
measurements. The adsorption studies of the desolvated composites
were also carried out in detail. The best performance is achieved
with one of the composites, which exhibits a 42% increase in BET surface
area while CO<sub>2</sub> uptake at 298 K is doubled in comparison
to the ZIF-8 nanoparticles.
2017-08-09 14:34:02
MOF nanocomposites
report self-assembled nanocomposites
adsorption studies
zeolitic imidazolate framework
BET surface area
nanoscopic structures
adsorption properties
Enhanced Surface Area
FTIR
CO 2 uptake
TEM
Raman spectroscopic measurements
Situ Growth
NP
PXRD
CO 2 Uptake Self-assembly
FESEM
ZIF -8 nanoparticles
AC contents
298 K
desolvated composites
clay content
NH 2 groups