Abstract:
Photoactive zinc based nanoplates were developed through a rapid microwave synthesis. A low temperature thermolysis reaction in a surfactant medium was initially performed for producing microwave
active zinc based polar precursors. Using these precursors, the zinc oxide nanopowder having platelet
morphologies were prepared. The nanoplatelets exhibited random growth with non-polar (1 0 1) surface
as the major growth plane. The structural and functional features ofthe resultant zinc oxide samples were
monitored using XRD, FTIR, TEM and PL. The photocatalytic activities of the samples were investigated
through the standard photoreduction kinetics using the methylene blue dye. The catalytic efficiencies of
the samples were checked both under UV and sunlight. A comparative study was also performed with
the standard TiO2 sample. The analyses revealed that the microwave derived zinc oxide have higher
catalytic efficiency, than the standard titania samples, both under UV and sunlight illuminations. The
unique nature of the zinc oxide non-polar surfaces can be attributed due to the presence of more active
two dimensional open surfaces and the higher content of oxygen defect concentrations.
