Surface Functionalization of TiO2 Aerogels for Controlled Au Dispersion in Photocatalytic CO2 Cycloaddition
발표자
명현아 (인하대학교)
연구책임자
심상은 (인하대학교)
공동저자
명현아 (인하대학교), 심상은 (인하대학교)
초록
내용
Controlling Au dispersion on TiO2 photocatalysts remains difficult because metal loading, pore structure, and particle size often change together, obscuring the origin of catalytic performance. Here, we propose a TiO2 aerogel platform for directly comparing how surface functional groups influence Au deposition and photocatalytic CO2 cycloaddition. Pristine, cellulose-modified, and dialdehyde cellulose-modified TiO2 aerogels, denoted PTA, CTA, and DTA, were designed to retain similar porous frameworks while varying surface chemistry. Au was loaded at a fixed 1 wt% to produce AuPTA, AuCTA, and AuDTA. We hypothesize that cellulose-derived species, especially aldehyde-rich DTA, promote Au nucleation and anchoring, yielding smaller and more uniformly dispersed Au nanoparticles. N2 isotherm, TGA, ICP-OES, and TEM will be correlated with photocatalytic performance to determine whether activity trends mainly originate from Au dispersion rather than bulk structural differences.