物理化学学报2011，Vol.27Issue(8)：1941-1946,6.
微米级大孔结构二氧化钛的光催化活性
Photocatalytic Activity of TiO2 with Micrometer-Sized Macropores
摘要
Abstract
Macroporous TiO2 with aligned channels was synthesized using citric acid as a chelator. The wall of the macropore was composed of nanosized anatase crystals. The degradation of rhodamine B (RhB) was used as a model reaction to test the photocatalytic activity of the samples. Compared with ground TiO2 powder, macroporous TiO2 with aligned channels did not give a better photocatalytic RhB degradation property. Because of the scattering of UV-light by anatase nanoparticles, the TiO2 located inside the macroporous wall was not irradiated by UV-light, and this affected the photocatalytic property of the macroporous TiO2. The photocatalytic property improved upon exposing more of the external TiO2 surface to UV light. Furthermore, uniform and dispersed micrometer sized TiO2 spheres were fabricated using cetyltriethylammonium bromide (CTAB) and polyacrylic acid (PAA) as templates. The photocatalytic degradation of RhB confirmed that reducing the particle size improved the efficiency of the photocatalytic activity.关键词
二氧化钛/光催化/形貌/大孔结构/散射Key words
TiO2/ Photocatalysis/ Morphology/ Macroporous structure/ Scattering分类
化学化工引用本文复制引用
佟欣,陈睿,陈铁红..微米级大孔结构二氧化钛的光催化活性[J].物理化学学报,2011,27(8):1941-1946,6.基金项目
国家自然科学基金(20873070,20973095)资助项目 （20873070,20973095）
