摘要
利用钛箔表面沉积一层TiO2纳米粒子作为晶种,与NaOH反应,通过改变反应温度制备了TiO2纳米管与纳米线.在170℃,48h的条件下合成了TiO2纳米管.在180℃时得到另一种一维的TiO2纳米线.并用XRD,SEM,SAED,EDS及HRTEM等分析手段对两种产物的成分、形貌、结构进行表征.对TiO2纳米管电极的光电化学性能进行了研究.结果表明,TiO2纳米管与纳米线为锐钛矿型和金红石型的混晶结构.TiO2纳米管单色光的光电转化效率达到10.38%.与钛酸盐纳米管相比,混晶结构TiO2纳米管显示出优良的光电转化性能.
TiO2 nanotubes and nanowires were prepared with a hydrothermal method in which titanium foil deposited with TiO2 nanoparticles was used. By controlling reaction temperature, TiO2 nanotubes and nanowires could be obtained, which were characterized with XRD, SEM, SAED, EDS and HRTEM. The results indicated that the TiO2 nanotubes were ca. 20-200 nm in out-diameter and several micrometers to tens in length. The diameter of the nanowire was about 50 nm and the length up to several micrometers. The structure of the TiO2 nanotube is a mixture of an anatase and a rutile phases. The photoelectrical results show that the maximum value of IPCE （incident monochromatic photon-to-current conversion efficiency） reached 10.38%. Compared with titanate nanotube, the photoelectrochemical properties of the TiO2 nanotubes was excellent.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2008年第7期757-761,共5页
Acta Chimica Sinica
基金
国家自然科学基金(Nos.20573031
20203008)
河北省自然科学基金(No.202351)
河北省教育厅(No.Z2005203)资助项目
