Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 649, Issue -, Pages 190-195Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.07.145
Keywords
TiO2 porous film; CdS; PbS; Photocurrent response; Photocatalysis performance
Categories
Funding
- State Key Program for Basic Research of China [2013CB632705]
- National Natural Science Foundation of China [11334008, 61290301, 51472003, 51272001, 51002156, 51102072]
- Science Foundation for Excellent Youth Talents of Chuzhou University [2013RC007]
- Doctor Scientific Research Fund of Anhui University
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A novel translucent TiO2 porous film was prepared through etched method. The CdS, PbS and CdS/PbS nanoclusters were imbedded on TiO2 porous film by successive ionic layer adsorption and reaction method. Microstructure, morphology, optical and photoelectron-chemical properties of the as-synthesized thin films were investigated systematically. XRD and morphology analysis showed that PbS or CdS nanoclusters have been attached to the TiO2 porous films. It was found that the energy band gap of TiO2 porous film decreased from 3.46 to 3.2 eV after sensitized with nanoclusters. The photo-current density of ITO/TiO2 photoelectrode increased from 0.017 to 0.28 mA/cm(2) after co-sensitized with CdS and PbS nanoclusters. Besides, the photoelectrode sensitized with two sorts of nanoclusters showed evident higher photocurrent density than which sensitized just one sort of nanoclusters. The photocurrent density of ITO/TiO2/PbS and TO/TiO2/CdS photoelectrode was 0.11 mA/cm(2) and 0.22 mA/cm(2) respectively. 0.28 mA/cm(2) can be obtained by ITO/TiO2/CdS/PbS photoelectrode. The results showed that the optical and photoelectrochemistry properties and phtotcatalysis performance of TiO2 porous film were greatly improved by co-sensitized with CdS and PbS nanoclusters. (C) 2015 Elsevier B.V. All rights reserved.
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