Facial Fabrication of CdS Nanoparticles Sensitized TiO2 Nanomesh with Enhanced Photocatalytic Activity

doi:10.7517/j.issn.1674-0475.2018.03.008

Abstract

Abstract: CdS nanoparticles coated on TiO₂ mesh with high photocatalytic activity were successfully synthesized by a simple anodic oxidation method combined with continuous ion layer adsorption method. The CdS nanoparticles were evenly distributed on the top surface of the TiO₂ nanotubes without clogging the tube entrances. Compared with the unmodified TiO₂, the CdS/TiO₂ composited catalyst possessed extended light absorption region and highest photocatalytic activities. After 120 min of irradiation, MB was degraded with the removal ratio of 71.3% on the bare TiO₂ mesh, much lower than 98.3% on the CdS/TiO₂ composited catalyst. Furthermore, the highest photocurrents were obtained on CdS/TiO₂ composited catalyst when the depositing cycles of CdS reached to 15. The improved photodegradation efficiency on the composited catalyst mainly results from the enhanced visible-light absorption and lowest recombination rate of the electron-hole pairs due to the narrow-band-gap semiconductor of CdS.

Key words: TiO₂ mesh, CdS, nanocomposites, photocatalysis

LI Yue, SONG Yuze, TAO Yanzhong, GAO Fengxian, TANG Ning. Facial Fabrication of CdS Nanoparticles Sensitized TiO₂ Nanomesh with Enhanced Photocatalytic Activity[J]. Imaging Science and Photochemistry, 2018, 36(3): 275-282.

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Facial Fabrication of CdS Nanoparticles Sensitized TiO₂ Nanomesh with Enhanced Photocatalytic Activity

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