论文部分内容阅读
TiO_2 nanorod arrays(NRAs) were prepared on fluorine doped tin oxide(FTO) substrates by a facile two-step hydrothermal method. The nanorods were selectively grown on the FTO regions which were covered with TiO_2 seeding layer. It took 5 h to obtain the compact arrays with the nanorod length of ~2 μm and diameter of ~50 nm. The photoelectrochemical(PEC) properties of TiO_2 NRAs are also investigated. It is demonstrated that the TiO_2 NRAs indicate the good photoelectric conversion ability with an efficiency of 0.22% at a full-wavelength irradiation. A photocurrent density of 0.21 mA /cm~2 is observed at 0.7 V versus the saturated calomel electrode(SCE). More evidences suggest that the charge transferring resistance is lowered at an irradiation, while the flat-band potential(V_(fb)) is shifted towards the positive side.
TiO 2 nanorod arrays (NRAs) were prepared on fluorine-doped tin oxide (FTO) substrates by selectively coupled to TiO 2 seeding layer. It took 5 h to obtain the The photoelectrochemical (PEC) properties of TiO 2 NRAs are also investigated. It is demonstrated that the TiO_2 NRAs indicate the good photoelectric conversion ability with an efficiency of 0.22% at a full-wavelength irradiation. A photocurrent density of 0.21 mA / cm ~ 2 was observed at 0.7 V versus the saturated calomel electrode (SCE). More evidences that the transfer forwarding resistance is lowered at an irradiation, while the flat-band potential (V_ (fb)) is shifted towards the positive side.