Polyaniline-loaded metal-organic framework MIL-101(Cr): Promising adsorbent for CO₂ capture with increased capacity and selectivity by polyaniline introduction

다국어 초록 (Multilingual Abstract)

<P><B>Abstract</B></P> <P>Highly porous metal-organic framework (MOF), MIL-101(Cr), was modified by introduction of polyaniline (PANI) <I>via</I> ship in bottle strategy in order to utilize basic moieties of PANI in capturing CO<SUB>2</SUB> effectively from flue gas. PANI@MIL-101(Cr), with suitable PANI concentration, showed highly increased adsorption capacity for CO<SUB>2</SUB>, especially at low pressure of 0.15 atm, even though the porosity of MIL-101(Cr) was decreased upon PANI loading. Moreover, the PANI@MIL-101(Cr) showed increased selectivity for CO<SUB>2</SUB> (against N<SUB>2</SUB>), compared with pristine MIL-101(Cr); and stable reusability. The observed favorable adsorption of CO<SUB>2</SUB> on the PANI@MIL-101(Cr) might be because of basic species on well-dispersed PANI on the MOF. The results indicate that modification of porous materials such as MOFs with PANI might be one way to improve performances for CO<SUB>2</SUB> capture.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Polyaniline (PANI)@MIL-101(Cr) was prepared <I>via</I> ship-in-bottle strategy. </LI> <LI> PANI@MIL-101(Cr) was highly effective in capturing CO<SUB>2</SUB> at low pressure. </LI> <LI> Both adsorption capacity and selectivity could be increased with PANI loading. </LI> <LI> Optimization of PANI content in MIL-101(Cr) is required for efficient CO<SUB>2</SUB> capture. </LI> <LI> Reusability of PANI@MIL-101(Cr) was confirmed. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>