College of Materials Science and Engineering, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, 2999 North Renmin Road, Shanghai 201620, P. R. China.
Chem Asian J. 2012 Oct;7(10):2313-20. doi: 10.1002/asia.201200590. Epub 2012 Aug 13.
Anatase TiO(2) nanorods with large specific surface areas and high crystallinity have been synthesized by surfactant-free hydrothermal treatment of water-soluble peroxotitanium acid (PTA). X-ray diffraction and TEM analysis showed that all TiO(2) nanorods derived from PTA in different hydrothermal processes were in the anatase phase, and high aspect ratio TiO(2) nanorods with chain-shaped structures were formed at 150 °C for 24 h by oriented growth. The nanorods were fabricated as photoanodes for high-efficiency dye-sensitized solar cells (DSSCs). DSSCs fabricated from the chain-shaped TiO(2) nanorods gave a highest short-circuit current density of 14.8 mA cm(-2) and a maximum energy conversion efficiency of 7.28 %, as a result of the presence of far fewer surface defects and grain boundaries than are present in commercial P25 TiO(2) nanoparticles. Electrochemical impedance spectroscopy also confirmed that DSSCs based on the TiO(2) nanorods have enhanced electron transport properties and a long electron lifetime.
锐钛矿 TiO(2) 纳米棒具有较大的比表面积和高结晶度，可通过无表面活性剂的水热处理水溶性过氧钛酸（PTA）合成。X 射线衍射和 TEM 分析表明，不同水热过程中源自 PTA 的所有 TiO(2)纳米棒均为锐钛矿相，在 150°C 下反应 24 h 时通过定向生长形成具有链状结构的高纵横比 TiO(2)纳米棒。这些纳米棒被用作高效染料敏化太阳能电池（DSSC）的光阳极。由链状 TiO(2)纳米棒制成的 DSSC 的短路电流密度高达 14.8 mA/cm(-2)，最大能量转换效率为 7.28%，这是因为与商业 P25 TiO(2)纳米颗粒相比，其表面缺陷和晶界要少得多。电化学阻抗谱也证实了基于 TiO(2)纳米棒的 DSSC 具有增强的电子传输性能和长电子寿命。
