Core-crown quantum-well nanoplatelet functionalized TIO2 for photocatalytic NOx abatement
Author(s)
Advisor
Özensoy, EmrahDate
2020-07Publisher
Bilkent University
Language
English
Type
ThesisItem Usage Stats
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Abstract
Oleic acid capped core/crown CdSe/CdSeTe quantum-well nanoplatelets (NPL) were used
in the surface functionalization of TiO2. Structural characterization of the synthesized
photocatalytic architecture was carried out to shed light on its surface chemistry, electronic,
and crystallographic structure. NPL/TiO2 composites were tested in NO photo-oxidation under
ultraviolet-A (UVA) and visible (VIS) light, showing a remarkable activity in NOx abatement
and high selectivity for nitrate storage as compared to standard benchmark TiO2 photocatalyst
(i.e. P25). Improved photocatalytic behavior can be attributed to the decrease in the bandgap
and enhanced photogenerated electron-hole pair separation as a result of the incorporation of
CdSe/CdSeTe NPL onto TiO2. Stability of composites was also investigated in durability tests.
Even though some decrease in photocatalytic activity and selectivity of NPL/TiO2 composites
was observed, performance of the NPL/TiO2 composites was found to be significantly better
than pure TiO2.
Keywords
Photocatalytic NOx abatementPHONOS
DeNOx index
Titanium dioxide
CdSe/CdSeTe nanoplatelets
Quantum-wells