Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, 11711 Cairo, Egypt.
Spectrochim Acta A Mol Biomol Spectrosc. 2013 Aug;112:46-51. doi: 10.1016/j.saa.2013.04.011. Epub 2013 Apr 10.
Highly active self-cleaning surfaces were prepared from hydrothermally treated TiO2 nanomaterials for different times (0, 12, 24 and 36 h) under acidic condition. TiO2 thin films were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM) and scanning electron microscope (SEM). TiO2 thin film (hydrothermal 24h) exhibited hybrid morphology from accumulated plates, clusters, rods and spheres. The photo self-cleaning activity in term of quantitative determination of the active oxidative species (OH) produced on the thin film surfaces was evaluated using fluorescent probe method. The results show that, the highly active thin film is the hydrothermally treated for 24 h at 200 °C. The structural, morphology and photoactivity properties of nano-TiO2 thin films make it promising surfaces for self-cleaning application. Mineralization of commercial textile dye (Remazol Red RB-133, RR) from highly active TiO2 thin film surface was applied. Moreover, the durability of this nano-TiO2 thin film (hydrothermal 24h) was studied.
采用水热法在酸性条件下处理 TiO2 纳米材料不同时间（0、12、24 和 36 h），制备具有高活性自清洁表面。采用 X 射线衍射（XRD）、透射电子显微镜（TEM）和扫描电子显微镜（SEM）对 TiO2 薄膜进行了表征。TiO2 薄膜（水热 24 h）表现出由堆积板、簇、棒和球组成的混合形态。采用荧光探针法定量测定薄膜表面产生的活性氧化物种（OH），评价光自清洁活性。结果表明，在 200°C 下水热处理 24 h 的薄膜具有高活性。纳米 TiO2 薄膜的结构、形貌和光活性特性使其成为自清洁应用的有前途的表面。从高活性 TiO2 薄膜表面对商用纺织染料（Remazol Red RB-133，RR）进行了矿化。此外，还研究了这种纳米 TiO2 薄膜（水热 24 h）的耐久性。
