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ISSN : 1225-0562(Print)
ISSN : 2287-7258(Online)
Korean Journal of Materials Research Vol.29 No.12 pp.790-797
DOI : https://doi.org/10.3740/MRSK.2019.29.12.790

Photocatalytic Efficiency and Bandgap Property of the CdS Deposited TiO2 Photocatalysts

Jong-Ho Lee1,Sujeong Heo1,Jeong-Il Youn2,Young-Jig Kim2,Su-Jeong Suh2,Han-Jun Oh3†
1 Department of Chemistry, Hanseo University, Seosan 31962, Republic of Korea
2 School of Advanced Materials Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
3 Department of Materials Science, Hanseo University, Seosan 31962, Republic of Korea
Corresponding author
E-Mail : hanjun58@hanseo.ac.kr (H.-J. Oh, Hanseo Univ.)

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.

TiO2/CdS 복합광촉매의 밴드갭 에너지 특성과 광촉매 효율

이종호1,허수정1,윤정일2,김영직2,서수정2,오한준3†
1한서대학교 화학과, 2성균관대학교 신소재공학부, 3한서대학교 신소재공학과

초록

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