Tuning Ti3+ and Oxygen Vacancy Sites in TiO2 Aerogels Using Dialdehyde Cellulose and Au Loading for Photo Driven CO2 Cycloaddition
발표자
명현아 (인하대학교)
연구책임자
심상은 (인하대학교)
공동저자
명현아 (인하대학교), 심상은 (인하대학교)
초록
내용
We report a defect engineering strategy for TiO2 aerogels by introducing cellulose and dialdehyde cellulose during the sol gel process to enhance photo driven CO2 cycloaddition. The cellulose derived polymers partially reduce TiO2 in situ, generating Ti3+ species and oxygen vacancy sites. Au was further loaded at about 1 wt% via deposition precipitation to enhance interfacial charge transfer at the defect rich TiO2 Au interface. Epoxide based CO2 cycloaddition was evaluated under 500 W/m2 irradiation with a long pass filter, and conversion and selectivity were used to assess the coupled roles of defect density and Au loading. This approach combines the high surface area aerogel architecture with controlled defect formation and Au synergy to improve CO2 utilization under mild conditions.