Shanghai Institute of Technology, Shanghai, 200235, PR China.
Photochem Photobiol Sci. 2010 Jan;9(1):39-46. doi: 10.1039/b9pp00084d. Epub 2009 Dec 11.
Mesoporous TiO(2) films and ion-doped photocatalytic films, displaying a worm-like pattern, have been synthesized by dip-coating of ITO glass into an organic-inorganic sol followed by aging and calcination of the coating at different temperature. The prepared films were investigated by X-ray diffraction (XRD), UV-Vis reflectance spectra, scanning electron microscope (SEM), transmission electron microscopy (TEM) and photoelectrochemical measurement, and were confirmed to be of mesoporous characteristic. Degradation of methyl orange (MO) has been performed using the new film electrodes under UV light and artificial solar light illumination. The influence of variables, such as applied bias, pH, supporting electrolyte, MO concentration and the load of the films, on the degradation of the dye was investigated. More than 97% degradation of MO was achieved under the feasible experimental conditions in 2 h photoelectrocatalytic reaction with UV light illumination and mesoporous film TiO(2)/ITO as electrode. The activity of the mesoporous film V-TiO(2) was the highest of the newly synthesized films V-TiO(2), Ce-TiO(2), F-TiO(2) and pure TiO(2) under artificial solar light. The degradation ratio of MO was about 43% over 2 h reaction using V-TiO(2)/ITO as the electrode. The activity of the mesoporous film under artificial solar light needs to be increased further.
介孔 TiO(2) 薄膜和离子掺杂光催化薄膜，呈现出蠕虫状图案，通过将 ITO 玻璃浸入有机-无机溶胶中，然后在不同温度下对涂层进行老化和煅烧来合成。通过 X 射线衍射（XRD）、紫外可见反射光谱、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和光电化学测量对制备的薄膜进行了研究，证实其具有介孔特征。使用新的薄膜电极在紫外光和人工太阳光照射下进行了甲基橙（MO）的降解。研究了变量，如施加偏压、pH 值、支持电解质、MO 浓度和薄膜负载，对染料降解的影响。在可行的实验条件下，在 2 小时的光电催化反应中，在紫外光照射下，介孔膜 TiO(2)/ITO 作为电极，MO 的降解率超过 97%。在人工太阳光下，新合成的薄膜 V-TiO(2)、Ce-TiO(2)、F-TiO(2)和纯 TiO(2)中，介孔膜 V-TiO(2)的活性最高。使用 V-TiO(2)/ITO 作为电极，在 2 小时的反应中，MO 的降解率约为 43%。介孔膜在人工太阳光下的活性需要进一步提高。
