Photocurrent Properties of TiO2 Nanorods Grown on FTO by Hydrothermal Method

被引:0
|
作者
Kim, Hyun [1 ]
Yang, Bee Lyong [1 ]
机构
[1] Kumoh Natl Inst Technol, Sch Adv Mat & Syst Engn, Gumi 39177, South Korea
关键词
Titanium dioxide(TiO2) nanorod; Hydrothermal method; FTO facing; Photo-activity;
D O I
10.4191/kcers.2015.52.6.531
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
In this work, we undertake a comparative study of the crystallographic microstructures and photo-catalytic properties of rutile TiO2 nanorods grown on FTO facing up and down by a hydrothermal method. An analysis of the fine structures showed that TiO2 nanorods grown on FTO facing up were mixed with sea urchin and microsphere. These structures induced a vertical orientation of the nanorods on FTO. The saturated photocurrent densities of the TiO2 nanorods grown both up and down were 1.5 mA/cm(2) in the former case, the IPCE was increased to 10% at 300 similar to 350 nm. The onset potential (?flat band potential) of the nanorods grown on FTO facing up is negatively shifted to a value of -0.31 V. This is caused by an increase in the surface state, in this case the number of oxygen vacancies, and by the formation of Ti3+. Therefore, the FTO facing direction is considered as a critical factor during the hydrothermal reaction for TiO2 growth so as to develop an efficient photo-catalytic system.
引用
收藏
页码:531 / 534
页数:4
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