POS6-0937
Cellulose-TiO2 Hybrid Aerogels for Interfacial Control of Au Dispersion in Photocatalytic CO2 Cycloaddition
When and Where
Nov 30, -0001
00:00 - 00:00
Room 301 (Grand Ballroom)
Presenter(s)
Hyun A Myoung (Department of Chemistry and Chemical Engineering, Education and Research Center for Smart Energy and Materials, Inha University, Incheon 22212, Korea)
Co-Author(s)
Abstract
Cellulose nanomaterials offer a useful platform for introducing tunable organic functional groups into inorganic porous photocatalysts. In this study, TiO2 aerogels incorporating cellulose nanocrystals (CNC) or dialdehyde cellulose nanocrystals (DACNC) were prepared to investigate how cellulose-derived interfacial chemistry affects aerogel morphology, Au deposition behavior, and photocatalytic CO2 cycloaddition. Pristine TiO2 aerogels and cellulose-TiO2 hybrid aerogels were fabricated through nanoparticle-based gelation, solvent exchange, and supercritical CO2 drying. CNC and DACNC were employed as hydroxyl-rich and aldehyde-rich additives, respectively, allowing the effect of surface functional groups to be compared within a similar TiO2 aerogel framework.
The incorporation of cellulose nanomaterials altered the porous network of the TiO2 aerogels, resulting in differences in aggregation behavior, optical appearance, and accessible pore structure. SEM and N2 physisorption were used to evaluate the morphology and textural properties of the aerogels before and after Au loading. Au was introduced onto the aerogel framework to examine whether cellulose-derived functional groups can influence metal nucleation and dispersion. The photocatalytic performance of the resulting materials was then evaluated for CO2 cycloaddition under mild reaction conditions.
Comparison of pristine TiO2, CNC-TiO2, and DACNC-TiO2 aerogels suggests that the interfacial environment created by cellulose additives is closely related to the structure-performance relationship of hybrid aerogel photocatalysts. In particular, hydroxyl- and aldehyde-rich interfaces may affect Au particle formation, pore preservation, and light-driven catalytic behavior. This work presents a functional-group-based strategy for designing polymer-inorganic hybrid aerogels and provides insight into the role of cellulose-derived interfaces in photocatalytic CO2 utilization.
The incorporation of cellulose nanomaterials altered the porous network of the TiO2 aerogels, resulting in differences in aggregation behavior, optical appearance, and accessible pore structure. SEM and N2 physisorption were used to evaluate the morphology and textural properties of the aerogels before and after Au loading. Au was introduced onto the aerogel framework to examine whether cellulose-derived functional groups can influence metal nucleation and dispersion. The photocatalytic performance of the resulting materials was then evaluated for CO2 cycloaddition under mild reaction conditions.
Comparison of pristine TiO2, CNC-TiO2, and DACNC-TiO2 aerogels suggests that the interfacial environment created by cellulose additives is closely related to the structure-performance relationship of hybrid aerogel photocatalysts. In particular, hydroxyl- and aldehyde-rich interfaces may affect Au particle formation, pore preservation, and light-driven catalytic behavior. This work presents a functional-group-based strategy for designing polymer-inorganic hybrid aerogels and provides insight into the role of cellulose-derived interfaces in photocatalytic CO2 utilization.
