Photoelectrocatalytic degradation of methylene blue on cadmium sulfide–sensitized titanium dioxide film

Yu Hsuan Wu, Tsunghsueh Wu, Yang Wei Lin

Research output: Contribution to journalArticle

Abstract

Herein, cadmium sulfide–sensitized titanium dioxide (CdS/TiO2) deposited on a fluoride-doped tin oxide electrode is proposed for achieving the photoelectrocatalytic (PEC) degradation of methylene blue (MB). Under optimum conditions (six accumulative CdS depositions, 3.0-V DC applied biased potential, and 300-W Xe arc lamp irradiation), the prepared CdS/TiO2 films exhibited the highest PEC degradation of MB (82 ± 3%) compared with photocatalytic (70 ± 5%) or electrocatalytic (39 ± 5%) degradation. In addition, the higher current density (0.08425 mA/cm2) and the lower charge transfer resistance (78.5 Ω) of 6-CdS/TiO2 film were observed. These were attributable to the strong visible light absorption of CdS, the high charge separation efficiency in the CdS/TiO2 heterostructure, and the low electron–hole recombination rate from the applied biased potential. The feasibility of 6-CdS/TiO2 film was evaluated by the MB degradation in environmental water samples, which demonstrated a high PEC activity (71 ± 3% degradation) of CdS/TiO2 film.

Original languageEnglish
Article number110500
JournalMaterials Research Bulletin
Volume118
DOIs
Publication statusPublished - 2019 Oct

Fingerprint

Methylene Blue
methylene blue
Cadmium
titanium oxides
Titanium dioxide
cadmium
degradation
Degradation
Arc lamps
arc lamps
polarization (charge separation)
electromagnetic absorption
Tin oxides
Fluorides
Light absorption
tin oxides
high current
fluorides
Heterojunctions
Charge transfer

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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title = "Photoelectrocatalytic degradation of methylene blue on cadmium sulfide–sensitized titanium dioxide film",
abstract = "Herein, cadmium sulfide–sensitized titanium dioxide (CdS/TiO2) deposited on a fluoride-doped tin oxide electrode is proposed for achieving the photoelectrocatalytic (PEC) degradation of methylene blue (MB). Under optimum conditions (six accumulative CdS depositions, 3.0-V DC applied biased potential, and 300-W Xe arc lamp irradiation), the prepared CdS/TiO2 films exhibited the highest PEC degradation of MB (82 ± 3{\%}) compared with photocatalytic (70 ± 5{\%}) or electrocatalytic (39 ± 5{\%}) degradation. In addition, the higher current density (0.08425 mA/cm2) and the lower charge transfer resistance (78.5 Ω) of 6-CdS/TiO2 film were observed. These were attributable to the strong visible light absorption of CdS, the high charge separation efficiency in the CdS/TiO2 heterostructure, and the low electron–hole recombination rate from the applied biased potential. The feasibility of 6-CdS/TiO2 film was evaluated by the MB degradation in environmental water samples, which demonstrated a high PEC activity (71 ± 3{\%} degradation) of CdS/TiO2 film.",
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Photoelectrocatalytic degradation of methylene blue on cadmium sulfide–sensitized titanium dioxide film. / Wu, Yu Hsuan; Wu, Tsunghsueh; Lin, Yang Wei.

In: Materials Research Bulletin, Vol. 118, 110500, 10.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Photoelectrocatalytic degradation of methylene blue on cadmium sulfide–sensitized titanium dioxide film

AU - Wu, Yu Hsuan

AU - Wu, Tsunghsueh

AU - Lin, Yang Wei

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AB - Herein, cadmium sulfide–sensitized titanium dioxide (CdS/TiO2) deposited on a fluoride-doped tin oxide electrode is proposed for achieving the photoelectrocatalytic (PEC) degradation of methylene blue (MB). Under optimum conditions (six accumulative CdS depositions, 3.0-V DC applied biased potential, and 300-W Xe arc lamp irradiation), the prepared CdS/TiO2 films exhibited the highest PEC degradation of MB (82 ± 3%) compared with photocatalytic (70 ± 5%) or electrocatalytic (39 ± 5%) degradation. In addition, the higher current density (0.08425 mA/cm2) and the lower charge transfer resistance (78.5 Ω) of 6-CdS/TiO2 film were observed. These were attributable to the strong visible light absorption of CdS, the high charge separation efficiency in the CdS/TiO2 heterostructure, and the low electron–hole recombination rate from the applied biased potential. The feasibility of 6-CdS/TiO2 film was evaluated by the MB degradation in environmental water samples, which demonstrated a high PEC activity (71 ± 3% degradation) of CdS/TiO2 film.

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