Ru(bPy)_2 (NCS)_2染料敏化PbS/Zn^(2+)一TiO_2 复合半导体纳米多孔膜电极的光电化学  

Photoelectrochemistry of Composite Semiconductor Nanoporous Films Co-sensitized by Ru(bpy)2(NCS)2 Dye

作　　者：张莉[1] 高恩勤[1] 王艳芹[1] 李卫华[1] 杨迈之[1] 蔡生民[1] 

机构地区：[1]北京大学化学与分子工程学院,北京100871

出　　处：《化工冶金》2000年第2期113-117,共5页

基　　金：国家自然科学基金!(编号:29773003)

摘　　要：采用水热法合成了Ｚｎ２＋离子掺杂的ＴｉＯ２纳米粒子（掺杂量０．５％）；并用光电化学方法研究了 Ｒｕ（ｂＰｙ）２（ＮＣＳ）２（ｂｐｙ—２，２’－ｂｉｐｙｄｉｎｅ－４，４＇－ｄｉｃａｒｂｏｘｙｌｉｃ　ａｃｉｄ）分别敏化 Ｚｎ~２＋掺杂的 ＴｉＯ_２电极和 ＰｂＳ／Ｚｎ~２＋－ＴｉＯ_２复合半导体纳米多孔膜电极的光电化学行为．实验证明Ｒｕ（ｂｐｙ）２（ＮＣＳ）２敏化 ＰｂＳ／Ｚｎ２＋－ＴｉＯ_２复合半导体纳米多孔膜电极比单独敏化 Ｚｎ~２＋－ＴｉＯ_２电极的光电效果好，且敏化电极的光电流产生的起始波长都比 Ｚｎ２＋－ＴｉＯ２电极向长波方向移动；在 ３６０～６００ ｎｍ范围内， Ｒｕ（ｂｐｙ）２（ＮＣＳ）２敏化 ＰｂＳ／Ｚｎ２＋－ＴｉＯ_２复合半导体纳米多孔膜电极比单独敏化Ｚｎ~２＋掺杂ＴｉＯ~２电极的效果更好．Zn2+-doped TiO2 nanoparticles were prepared with the hydrothermal method. The photoelectrochemical properties of a Zn2+ - doped TiO2 nanoporous- film electrode sensitized by Ru(bpy)2(NCS)2 and Zn2+-TiO2/PbS composite semiconductor nanoporous films sensitized by Ru(bpy)2(NCS)2 were studied respectively. Doping, sensitizing and forming composite semi- conductor particles cause red-shifts in the photoelectric action spectra. The efficiency of conver- sion of light to electricity for the Zn2+-TiO2/PbS composite semiconductor nanoporous films is greatly improved and maximized.

关 键 词：光敏化 光电化学 复合半导体 纳米多孔膜电极 

分 类 号：O649[理学—物理化学]