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

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.