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.
The nanostructure electrodes were prepared with composite TiO2-ZnO nanoparticles via the method of homogeneous precipitating by using Ti ( SO4 ) 2 and Zn ( NO3 ) 2. The photoelectrochemical performance of the nanostructure electrodes were studied. The experiment results show that the highest IPCE was obtained with the composite TiO2-ZnO nanoparticles prepared at n [ Ti ( SO4 ) 2 ] : n [ Zn ( NO3 ) 2 ] = 3: 1 and calcining temperature 530℃ . The photoelectrochemical performances of the ITO/TiO2/RuL2 (SCN) 2 : 2TBA and ITO/TiO2 + ZnO/RuL2 (SCN)2: 2TBA electrodes were investigated. The highest IPCE was also obtained with the composite TiO2-ZnO nanoparticles prepared at n [ Ti ( SO4 ) 2 ] : n [ Zn ( NO3 ) 2 ] = 3 : 1 and calcining temperature 530 ℃. ITO/TiO2/Poly(3-methythiophene)(PMeT) and ITO/TiO2 + ZnO/PMeT were also studied. The p-n heterojunction existed in ITO/TiO2/PMeT and ITO/TiO2 + ZnO/PMeT, which favored the separation of electron-hole pairs. The ITO/TiO2 + ZnO/PMeT electrode obviously increased the photo-current conversion efficiency by ten times comparing with that of the ITO/TiO2/PMeT electrode.