School of Mechanical Engineering, Tianjin University, Tianjin, China.
Water Sci Technol. 2012;66(4):843-9. doi: 10.2166/wst.2012.247.
A new bifunctionalized TiO(2) film containing a dye-sensitized region and a degradation region was described. A similar structure of dye-sensitized solar cell (DSSC) was fabricated in the dye-sensitized region to accomplish separation of electrons from positive charges, and separation of dye from pollutants to avoid dye decomposition. The bifunctionalized TiO(2) film electrode and anode electrode can degrade methyl orange (MO) in reactors A and B, respectively. The degradation efficiency was enhanced remarkably by an external electrical potential. The decolorization of MO reaches as high as 95% after 2 h visible light irradiation at an external potential of 0.5 V along with a loss of 41% total organic carbon (TOC). The possible reason for the improvement of degradation by external DC potential was discussed. Effects of pH and inorganic salts on the decolorization are present.
一种新型的双功能化 TiO(2) 薄膜，包含一个染料敏化区域和一个降解区域。在染料敏化区域中制备了类似结构的染料敏化太阳能电池 (DSSC)，以实现电子与正电荷的分离，以及染料与污染物的分离，从而避免染料分解。双功能化 TiO(2) 薄膜电极和阳极电极可分别在反应器 A 和 B 中降解甲基橙 (MO)。施加外部电势后，降解效率显著提高。在外加 0.5 V 直流电势、可见光照射 2 h 后，MO 的脱色率高达 95%，总有机碳 (TOC) 损失 41%。讨论了外加直流电势提高降解效率的可能原因。还考察了 pH 值和无机盐对脱色的影响。
