| 태양광 수소 생산용 CdS와 CdSe 흡착 TiO2 나노튜브 어레이 |
| 김현, 양비룡 |
| 금오공과대학교 신소재공학과 |
| TiO2 Nanotube Arrays Sensitized with CdS and CdSe for Solar Hydrogen Production |
| Ulugbek Shaislamov, Hyun Kim, Bee-Lyong Yang |
| School of Advanced Materials and System Engineering, Kumoh National Institute of Technology |
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| ABSTRACT |
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In this work we report investigation results of enhanced visible light photocatalytic properties of CdS and CdSe sensitized $TiO_2$ nanotube heterostructures. Anodically grown ordered $TiO_2$ nanotube arrays were sensitized with CdS and CdSe by using successive ionic layer adsorption and reaction method. Photocatalytic measurements revealed that heterostructured samples show enhanced photocurrent density under the visible light illumination. Improved visible light performance of the heterostuctures was explained by lower band gap of the CdS and CdSe and their favorable conduction band positions relative to $TiO_2$. Moreover, due to the lower band gap of the CdSe (1.7 eV) compared to CdS (2.4 eV), both photocurrent density and photoconversion efficiency results showed superior activity. |
| Key words:
$TiO_2$ nanotubes, SILAR, Hydrogen |
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