Hydrogen Generation by Photoelectrochemical Splitting of Water by Using CdS/TiO2 Nanotube Photoanode
In this study,hydrogen is generated from water via photoelectrochemical (PEC) process by using CdS/TiO2 photoanode,which is obtained in sequence chemical bath deposition (s-CBD) process.Experimentally,the CdS was deposited on TiO2 NTAs in s-CBD process.First,the TiO2 NTAs is immersed in Cd(NO3)2 and Na2S solution subsequently several cycles followed by annealing to get CdS/TiO2 photoanode.In this work,the factors were studied including immersion cycle,annealing temperature and UV illumination.The surface morphology,crystalline structure and CdS amount were characterized by SEM and XRD.The photoactivities of CdS/TiO2 photoanodes and hydrogen generation rate were investigated by PEC splitting of water.The results showed that the photoanode annealing in air at 300 ℃ had the highest photoactivity and the crystalline structure of CdS was composed of zinc blende and a small amount of wurtzite.The saturated current density was 6.163 mA/cm2 and the maximum photoelectrochemical conversion was 4.45 % under Xenon lamp (Ⅰ0 =100 mW/cm2) illumination.Besides,the photoactivity of CdS(UV)/TiO2 prepared under UV (λmax=253.7 nm) illumination was reduced.This was probably due to the aggregation of CdS.To sum up,the CdS/TiO2 photoanodes for photoelectrochemical splitting water could be a high prospective process of the energy source.
CdS calcination chemical bath deposition (CBD) photoelectrochemical (PEC) generation of hydrogen
Kuan-Wen Lin Fa Lin Kao-Kan Hsu Bo-Shing You Huey-lng Chen
Department of Chemical Engineering National Cheng Kung University,No1,University Road,Tainan,Taiwan,ROC
国际会议
大理
英文
403-407
2011-08-18（万方平台首次上网日期，不代表论文的发表时间）