Title of article
Dye Excitation and Surface Defects Mediated Photocatalytic Behavior of Vertically Aligned ZnO Nanorods
Author/Authors
Perumalsamy ، Sundara Venkatesh Nanomaterials Laboratory, Department of Physics - Sri S. Ramasamy Naidu Memorial College , Saravanan ، Prabhu Department of Physical-Chemistry - Faculty of Chemical Sciences - University of Concepcion , Kandasamy ، Jothivenkatachalam Department of Chemistry - Anna University, BIT Campus , Kulandaivel ، Jeganathan Department of Physics - Centre for Nanoscience and Nanotechnology - Bharathidasan University
From page
109
To page
119
Abstract
Photocatalyst for the degradation of the organic dye molecules has been investigated for the highly uniform vertically aligned ZnO nanorods grown on silicon substrates by radio frequency magnetron sputtering. An intense green luminescence located at 2.192 eV is corroborated by the singly charged oxygen vacancies and it is responsible for the visible-light-driven photocatalytic response in ZnO nanorods. The higher photocatalytic activity of organic dyes under the irradiation of visible light is enhanced due to the light absorption and better charge separation (eˉ-h^+) in vertically aligned ZnO nanorods. Further, the dye excitation is also accountable for the degradation mechanism besides surface defects under solar irradiation. Moreover, the ZnO nanorods exhibit suppressed photo corrosion and high photo-stability as evidenced by the recovery and recycling studies.
Keywords
ZnO nanorods , Sputtering , Photoluminescence , Dye molecules , Photodegradation
Journal title
International Journal of Nanoscience and Nanotechnology (IJNN)
Journal title
International Journal of Nanoscience and Nanotechnology (IJNN)
Record number
2741706
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