[3PS-176]
Green Photocatalysis: Dialdehyde Cellulose–TiO₂ Aerogel for CO₂ Cycloaddition
발표자명현아 (인하대학교)
연구책임자심상은 (인하대학교)
Abstract
In this study, we introduce a green sol–gel route to synthesize a porous TiO₂ aerogel using TEMPO-oxidized dialdehyde cellulose (DAC). DAC reacts with a titanium alkoxide precursor to form a wet gel, which transforms into an aerogel via supercritical CO₂ drying and calcination. Aldehyde groups on DAC partially reduce Ti⁴⁺, creating abundant oxygen vacancies. In CO₂ cycloaddition tests, the DAC-templated aerogel outperformed TiO₂ nanoparticles made by precipitation. XRD, SEM, BET, and XPS confirmed its high porosity, large surface area, and vacancy-rich structure, demonstrating the promise of renewable polymer templates for advanced photocatalysts.