Hydrogen Generation by Photoelectrochemical Splitting of Water by Using CdS/TiO2 Nanotube Photoanode

Kuan Wen Lin; Fa Lin; Kao Kan Hsu; Bo Shing You; Huey Ing Chen

doi:10.4028/www.scientific.net/MSF.694.403

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Determination of Size Distribution of Dispersed Nanophases and Spaces among them in PVC/MBS Blends by TEM Image Analysis
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HomeMaterials Science ForumMaterials Science Forum Vol. 694Hydrogen Generation by Photoelectrochemical...

Hydrogen Generation by Photoelectrochemical Splitting of Water by Using CdS/TiO₂ Nanotube Photoanode

Abstract:

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 °C 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.

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Periodical:

Materials Science Forum (Volume 694)

Pages:

403-407

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.694.403

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Online since:

July 2011

Authors:

Kuan Wen Lin, Fa Lin, Kao Kan Hsu, Bo Shing You, Huey Ing Chen

Keywords:

Calcination, CdS, Chemical Bath Deposition (CBD), Generation of Hydrogen, Photoelectrochemical (PEC)

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