Chu Song-Zhu, Inoue Satoru, Wada Kenji, Li Di, Haneda Hajime, Awatsu Satoshi
Advanced Materials Laboratory, National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba, Ibaraki, 305-0044, Japan.
J Phys Chem B. 2003 Jul 10;107(27):6586-9. doi: 10.1021/jp0349684.
Three-dimensional highly porous TiO2-4%SiO2-1%TeO2/Al2O3/TiO2 composite nanostructures (φ30-120 nm) directly fixed on glass substrates were fabricated by anodization of a superimposed Al/Ti layer sputter-deposited on glass and a sol-gel process. The porous composite nanostructures exhibited enhanced photocatalytic performances in decomposing acetaldehyde gas under UV illumination, which can be mainly ascribed to the combination of their large surface areas (7750-14770 m(2)/m(2)), high porosities (34.2-45.6%), and transparency. Specially, the composite nanostructure with ∼φ120 nm pores calcined at 500 °C showed the highest photocatalytic activity that is 6-10 times higher than commercial P-25 TiO2 under the experimental conditions.
通过对溅射沉积在玻璃上的Al/Ti叠加层进行阳极氧化以及溶胶 - 凝胶工艺，制备了直接固定在玻璃基板上的三维高度多孔TiO₂ - 4%SiO₂ - 1%TeO₂/Al₂O₃/TiO₂复合纳米结构（φ30 - 120 nm）。该多孔复合纳米结构在紫外光照射下分解乙醛气体时表现出增强的光催化性能，这主要归因于其大表面积（7750 - 14770 m²/m²）、高孔隙率（34.2 - 45.6%）和透明度的综合作用。特别地，在500℃下煅烧的具有约φ120 nm孔隙的复合纳米结构表现出最高的光催化活性，在实验条件下比商业P - 25 TiO₂高6 - 10倍。
