Synthesis of TiO_2 Nanocrystals with Specific Crystal Plane on the Surface and Characterization of Their Photocatalytic and Dye-Sensitized Properties

本论文以层状钛酸盐纳米片为前驱体，采用一种新的方法合成了表面具有特定晶面的锐钛矿型TiO_2纳米晶，并研究了其光催化活性和染料敏化太阳能电池性能。采用水热法处理H_Ti_O_4纳米片溶液，可以制备出表面具有（010）晶面的TiO_2纳米晶<1.07><1.74>。（010）晶面表现出较高的光催化活性和较高的染料吸附量。染料敏化太阳能电池的研究结果表明，V<oc>值随染料吸附量的增加而增加，J<sc>值随吸附常数的增加而增加。首次给出了染料吸附参数与太阳能电池参数之间的定量关系。

In this study, we developed a novel process for the synthesis of anatase-type TiO_2 nanocrystals with specific crystal plane on the crystal surface using layered titanate nanosheets as the precursor and studied their photocatalytic activity and dye-sensitized solar cell performance. The TiO_2 nanocrystals with (010) plane on the surface can be prepared by hydrothermal treatment of H_<1.07>Ti_<1.74>O_4 nanosheet solution. The (010) plane presents the high photocatalytic activity and high dye adsorption amount. The results of dye-sensitized solar cell study indicate that the V_<oc> value increases with increasing the dye adsorption amount and the J_<sc> value increases with increasing adsorption constant. We give the quantitative relationships between the dye adsorption parameters and solar cell parameters for the first time.