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Synergizing nanocomposites of CdSe/TiO 2 nanotubes for improved photoelectrochemical activity via thermal treatment
Ist Teil von
Dalton transactions : an international journal of inorganic chemistry, 2016, Vol.45 (24), p.9925-9931
Erscheinungsjahr
2016
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
In this work, we show the effect of the thermal treatment temperature on the photoelectrochemical (PEC) activity of CdSe/TiO
2
nanocomposites. TiO
2
nanotubes (NTs) were synthesized by anodization and the nanocomposites were obtained by depositing CdSe clusters
via
magnetron sputtering. A two-step thermal treatment was performed: heating the TiO
2
NTs at different temperatures prior to CdSe deposition and further heating the CdSe/TiO
2
nanocomposites. The nanocomposites were characterized by Rutherford backscattering spectroscopy (RBS), scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM), high-resolution transmission electron microscopy (HRTEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), UV-Vis spectrophotometry, and electrochemical impedance spectroscopy (EIS). To compare the PEC performance of the CdSe/TiO
2
nanocomposites and pristine TiO
2
NTs, linear sweep voltammetry (LSV) curves were obtained under visible light and under 1 sun illumination. It was observed that CdSe incorporation into the TiO
2
template enhances the visible light absorbance thereby improving the PEC performance of the nanocomposites. We have found that the optical, structural and PEC properties of the CdSe/TiO
2
nanocomposites are dependent on the thermal treatment temperature of the TiO
2
nanotubular substrate, prior to CdSe deposition. Moreover, a three-fold improvement in photocurrent was observed upon further thermal treatment of the obtained nanocomposite.
Sprache
Englisch
Identifikatoren
ISSN: 1477-9226
eISSN: 1477-9234
DOI: 10.1039/C6DT00235H
Titel-ID: cdi_crossref_primary_10_1039_C6DT00235H
Format
–
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