Photocatalytic Efficiency and Bandgap Property of the CdS Deposited TiO2 Photocatalysts

Jong-Ho Lee; Sujeong Heo; Jeong-Il Youn; Young-Jig Kim; Su-Jeong Suh; Han-Jun Oh

doi:10.3740/MRSK.2019.29.12.790

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2019 Vol.29, Issue 12 Preview Page Next Page

Photocatalytic Efficiency and Bandgap Property of the CdS Deposited TiO₂ Photocatalysts TiO₂/CdS 복합광촉매의 밴드갭 에너지 특성과 광촉매 효율

December 2019. pp. 790-797

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Abstract

To improve photocatalytic performance, CdS nanoparticle deposited TiO₂ nanotubular photocatalysts are synthesized. The TiO₂ nanotube is fabricated by electrochemical anodization at a constant voltage of 60 V, and annealed at 500 for crystallization. The CdS nanoparticles on TiO₂ nanotubes are synthesized by successive ionic layer adsorption and reaction method. The surface characteristics and photocurrent responses of TNT/CdS photocatalysts are investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), UV-Vis spectrometer and LED light source installed potentiostat. The bandgaps of the CdS deposited TiO₂ photocatalysts are gradually narrowed with increasing of amounts of deposited CdS nanoparticles, which enhances visible light absorption ability of composite photocatalysts. Enhanced photoelectrochemical performance is observed in the nanocomposite TiO₂ photocatalyst. However, the maximum photocurrent response and dye degradation efficiency are observed for TNT/CdS30 photocatalyst. The excellent photocatalytic performance of TNT/CdS30 catalyst can be ascribed to the synergistic effects of its better absorption ability of visible light region and efficient charge transport process.

Keywords

TiO₂ nanotube

successive ionic layer adsorption and reaction (SILAR) method

CdS deposition

Tauc plot

dye degradation

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 29
No :12
Pages :790-797
Received Date : 2019-11-10
Revised Date : 2019-11-19
Accepted Date : 2019-11-19
DOI :https://doi.org/10.3740/MRSK.2019.29.12.790

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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