TY - JOUR
T1 - Adsorptive Removal of Indole and Quinoline from Model Fuel over Various UiO-66s
T2 - Quantitative Contributions of H-Bonding and Acid-Base Interactions to Adsorption
AU - Sarker, Mithun
AU - An, Hyung Jun
AU - Jhung, Sung Hwa
N1 - Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/3/1
Y1 - 2018/3/1
N2 - Nitrogen-containing compounds (NCCs) such as indole (IND) and quinolone (QUI) in a model fuel were adsorbed over pristine and variously functionalized metal-organic frameworks (MOFs) (here, UiO-66 and -NH2, -NH3+, -COOH, -COONa, -OH, -SO3H functionalized UiO-66s) to quantitatively understand the interactions between the adsorbates (IND and QUI) and UiO-66s. The adsorbed quantity of IND and QUI increased linearly with increasing number of H-acceptors and H-donors (for H-bond), respectively, on UiO-66s (excluding one MOF for each adsorption), confirming the importance of H-bonding in the adsorption. UiO-66-NH3+ and UiO-66-NH2 showed a deviated trend in the IND and QUI adsorption, respectively; this might be explained by cation-π interactions and base-base repulsion, respectively. Moreover, the QUI adsorption increased linearly with increasing number of acidic sites on the MOFs (excluding basic ones), also suggesting the importance of acid-base interactions. Finally, UiO-66-NH3+ showed the highest adsorption for both IND and QUI among the studied MOFs, suggesting that introducing an ammonium group on MOFs can be one way to develop a competitive adsorbent for the adsorptive denitrogenation of fuels.
AB - Nitrogen-containing compounds (NCCs) such as indole (IND) and quinolone (QUI) in a model fuel were adsorbed over pristine and variously functionalized metal-organic frameworks (MOFs) (here, UiO-66 and -NH2, -NH3+, -COOH, -COONa, -OH, -SO3H functionalized UiO-66s) to quantitatively understand the interactions between the adsorbates (IND and QUI) and UiO-66s. The adsorbed quantity of IND and QUI increased linearly with increasing number of H-acceptors and H-donors (for H-bond), respectively, on UiO-66s (excluding one MOF for each adsorption), confirming the importance of H-bonding in the adsorption. UiO-66-NH3+ and UiO-66-NH2 showed a deviated trend in the IND and QUI adsorption, respectively; this might be explained by cation-π interactions and base-base repulsion, respectively. Moreover, the QUI adsorption increased linearly with increasing number of acidic sites on the MOFs (excluding basic ones), also suggesting the importance of acid-base interactions. Finally, UiO-66-NH3+ showed the highest adsorption for both IND and QUI among the studied MOFs, suggesting that introducing an ammonium group on MOFs can be one way to develop a competitive adsorbent for the adsorptive denitrogenation of fuels.
UR - http://www.scopus.com/inward/record.url?scp=85042785042&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcc.8b00761
DO - 10.1021/acs.jpcc.8b00761
M3 - Article
AN - SCOPUS:85042785042
SN - 1932-7447
VL - 122
SP - 4532
EP - 4539
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 8
ER -