Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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CdSe Sensitized ZnO Nanorods on FTO Glass for Hydrogen Production under Visible Light Irradiation

가시광 수소생산용 CdSe/ZnO nanorod 투명전극

  • Kim, Hyun (Kumoh National Institute of Technology, School of Advanced Materials and System Engineering) ;
  • Yang, Bee Lyong (Kumoh National Institute of Technology, School of Advanced Materials and System Engineering)
  • 김현 (국립금오공과대학교 신소재공학과) ;
  • 양비룡 (국립금오공과대학교 신소재공학과)
  • Received : 2013.03.23
  • Accepted : 2013.04.26
  • Published : 2013.04.30
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Abstract

The ZnO is able to produce hydrogen from water however it can only absorb ultraviolet region due to its 3.37eV of wide band gap. Therefore efficiency of solar hydrogen production is low. In this work we report investigation results of improved visible light photo-catalytic properties of CdSe quantum dots(QDs) sensitized ZnO nanorod heterostructures. Hydrothermally vertically grown ZnO nanorod arrays on FTO glass were sensitized with CdSe by using SILAR(successive ionic layer adsorption and reaction) method. Morphology of grown ZnO and CdSe sensitized ZnO nanorods had been investigated by FE-SEM that shows length of $2.0{\mu}m$, diameter of 120~150nm nanorod respectively. Photocatalytic measurements revealed that heterostructured samples show improved photocurrent density under the visible light illumination. Improved visible light performance of the heterostructures is resulting from narrow band gap of the CdSe and its favorable conduction band positions relative to potentials of ZnO band and water redox reaction.

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References

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