Work

Boosted mass transfer and water tolerance in CO2 cycloaddition via hierarchically porous PVMDMS@PVP aerogel containing in-situ grown UiO-66-NH2

Year: 2026

Type: article

Abstract: A covalently co-networked poly(vinylmethyldimethoxysilane)/polyvinylpyrrolidone (PVMDMS@PVP) aerogel scaffold enables in-situ growth of UiO-66-NH 2 and grafting of 1-methylacetamido-3-methylimidazolium bromide ([MAmim]Br), forming a monolithic catalyst for integrated carbon dioxide (CO 2 ) capture and cycloaddition reaction. Tuning PVP content (5–20 wt %) during sol–gel synthesis yields a hierarchically porous network (> 1,000 m 2 ·g –1 ) that resists collapse under solvothermal conditions. Solvothermal crystallization within the network produces uniformly dispersed UiO-66-NH 2 (~ 34 wt %) without pore blockage, and ionic liqud (IL) grafting introduces dual sites for CO 2 adsorption and epoxide activation. The composite achieves 2.8 mmol g –1 CO 2 uptake at 25 °C and promotes solvent- and co-catalyst-free cycloaddition of allyl glycidyl ether (AGE) at 120 °C, 0.6 MPa CO 2 to > 99% conversion and selectivity with 0.151 mol % catalyst loading. Ten consecutive adsorption–desorption and reaction cycles retain > 97% of activity and structural integrity. An apparent activation energy of 37.5 kJ mol –1 (vs. 47.8 kJ·mol –1 for UiO-66-NH 2 -IL) highlights accelerated kinetics. Exceptional water tolerance and multi-cycle stability underscore its potential as a scalable platform for practical CO 2 valorization.

Source: Advanced Composites and Hybrid Materials

DOI: 10.1007/s42114-025-01615-4

Authors: Kyung Hoon Min, Byeongseok Kim, Hyung-Ho Park, Sung-Hyeon Baeck, Sang Eun Shim

Institutions: Inha University, Yonsei University

Language: English

Topic: Carbon dioxide utilization in catalysis

Subfield: Process Chemistry and Technology

Field: Chemical Engineering

Domain: Physical Sciences

SDGs: Climate action, Responsible consumption and production

Open Access status: hybrid

Estimated APC paid: $3,490