3d过渡金属掺杂TiO_2纳米晶膜电极的光电化学研究  

Photoelectrochemical Behavior of 3 d Transition Metal Nanostructured film Electrode Doped with TiO_2

作　　者：李卫华[1] 乔学斌[2] 高恩勤[2] 杨迈之[2] 郝彦忠[2] 蔡生民[2] 

机构地区：[1]安徽省宿州师范专科学校,宿州234000 [2]北京大学化学与分子工程学院,北京100871

出　　处：《高等学校化学学报》2000年第10期1534-1538,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金! (批准号 :2 9773 0 3 )资助

摘　　要：应用原子力显微镜和X射线粉末法对 3d过渡金属离子Cr(Ⅲ ) ,Fe(Ⅲ ) ,Mn(Ⅱ ) ,Co(Ⅱ ) ,Ni(Ⅱ ) ,Cu(Ⅱ )和Zn(Ⅱ )掺杂TiO2 纳米晶粒 (简写为M3d TiO2 )作了表征 ,并用光电化学方法研究了M3d TiO2 纳米结构多孔膜电极 .实验结果表明 ,M3d TiO2 纳米粒子的颗粒较均匀 ,粒径约为 1 5nm ,其晶型为锐钛矿和板钛矿的混晶 .在所研究的M3d TiO2 中 ,只有Zn2 + TiO2 电极的光电流大于未掺杂的TiO2 纳米结构多孔膜电极 .3d金属离子的掺杂引起各电极的光电流信号在一定波长范围内出现 pThe 3 d transition metal ions [Cr(Ⅲ), Fe(Ⅲ), Mn(Ⅱ), Co(Ⅱ), Ni(Ⅱ), Cu(Ⅱ), Zn(Ⅱ)] nanocrystalline doped with TiO 2(abbr. M 3 d TiO 2) were characterized by AFM and XRD. The M 3 d TiO 2 nanostructured film electroede was prepared and investigated with photoelectrochemical techniques. The results show that the size of M 3 d TiO 2 nanocrystalline particles was quite uniform and the radii were about 15 nm. The M 3 d TiO 2 nanocrystalline particles were a mixture of brookite and anatase crystal forms. Of all the M 3 d TiO 2 investigated in this paper, however, the photocurrent intensity of Zn 2+ TiO 2 nanostructured film electode was higher than that of the electrode undoped with TiO 2. The phenomenon of p n type inversion was observed in certain wavelength range, which was caused by 3 d transition ions doping. [WT5HZ]

关 键 词：光电化学 TiO2纳米晶膜电极 太阳能电池 

分 类 号：TM914.4[电气工程—电力电子与电力传动]