节点文献
TiO2与ZnO复合纳米结构电极的光电化学研究
Photoelectrochemical Studies on TiO_ 2-ZnO Composite Nanostructure Electrodes
【摘要】 利用尿素加压共沉淀法以Ti(SO4)2与Zn(NO3)2为原料制备了TiO2-ZnO复合纳米粒子,其纳米结构电极的光电化学研究结果表明,反应物摩尔比为3∶1,于530℃煅烧制备的复合纳米结构电极的光电转换效率最高.对吸附染料RuL2(SCN)2∶2TBA的纳米结构TiO2和各种复合纳米粒子的纳米结构电极进行光电研究的结果表明,染料对各纳米结构电极都起到了敏化作用,其中也是由反应物摩尔比为3∶1,于530℃煅烧制备的纳米结构电极的光电转换效率最高.对聚3-甲基噻吩修饰的纳米结构TiO2和摩尔比为3∶1,于530℃煅烧的复合纳米粒子构成的纳米结构电极进行光电性能研究,结果表明,聚3-甲基噻吩与半导体纳米粒子之间存在p-n结,在一定条件下p-n结的存在有利于光生电子/空穴的分离,从而提高了光电转化效率.
【Abstract】 The nanostructure electrodes were prepared with composite TiO_ 2-ZnO nanoparticles via the method of homogeneous precipitating by using Ti(SO_ 4)_ 2 and Zn(NO_ 3)_ 2.The photoelectrochemical performance of the nanostructure electrodes were studied.The experiment results show that the highest IPCE was obtained with the composite TiO_ 2-ZnO nanoparticles prepared at n∶n=3∶1 and calcining temperature 530 ℃.The photoelectrochemical performances of the ITO/TiO_ 2/RuL_ 2(SCN)_ 2∶2TBA and ITO/TiO_ 2+ ZnO/RuL_ 2(SCN)_ 2∶2TBA electrodes were investigated.The highest IPCE was also obtained with the composite TiO_ 2-ZnO nanoparticles prepared at n∶ n=3∶1 and calcining temperature 530 ℃.ITO/TiO_ 2/Poly(3-methythiophene)(PMeT)and ITO/TiO_ 2+ZnO/PMeT were also studied.The p-n heterojunction existed in ITO/TiO_ 2/PMeT and ITO/TiO_ 2+ZnO/PMeT,which favored the separation of electron-hole pairs.The ITO/TiO_ 2+ZnO/PMeT electrode obviously increased the photo-current conversion efficiency by ten times comparing with that of the ITO/TiO_ 2/PMeT electrode.
【Key words】 Photoelectrochemistry; TiO_ 2+ZnO composite nanostructure electrode; Poly(3-methythiophene);
- 【文献出处】 高等学校化学学报 ,Chemical Journal of Chinese Universities , 编辑部邮箱 ,2006年10期
- 【分类号】O611.3
- 【被引频次】14
- 【下载频次】448