Preparation and Photoelectrochemical Properties of
CdSe/TiO<sub>2</sub> Hybrid Mesoporous Structures
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Abstract
We report on the design and synthesis of a novel CdSe/TiO<sub>2</sub> hybrid mesoporous structure and its implementation as a photoanode
for photoelectrochemical (PEC) application. The CdSe/TiO<sub>2</sub> hybrid mesoporous structure was produced by assembling CdSe quantum
dots (QDs) and TiO<sub>2</sub> nanocrystals into CdSe/TiO<sub>2</sub> hybrid colloidal spheres, followed by calcination to remove the
capping ligands between CdSe and TiO<sub>2</sub>. Compared to the
system involving CdSe QDs directly linked to TiO<sub>2</sub> through
molecular linkers, this CdSe/TiO<sub>2</sub> hybrid mesoporous structure
affords the advantage of better interfacial coupling between CdSe
and TiO<sub>2</sub> due to closer contact. As a result, the CdSe/TiO<sub>2</sub> hybrid mesoporous structure exhibits significantly improved
photoresponse as a photoanode, as demonstrated successfully in comparative
PEC studies. This study illustrates the importance of fundamental
structural control in influencing PEC properties of hybrid assembled
nanostructures