UV-A light-induced photodegradation of Acid Blue 113 in the presence of Sm-doped ZnO nanostructures

Thangaraj Pandiyarajan, Ramalinga Viswanathan Mangalaraja, Balasubramanian Karthikeyan, Panneerselvam Sathishkumar, Héctor D. Mansilla, David Contreras, José Ruiz

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18 Scopus citations


In this report, optical and photocatalytic degradation of Acid Blue 113 (AB 113) has been investigated in an aqueous heterogeneous media containing pure and Sm-doped ZnO nanostructures which were prepared by a simple wet chemical route. X-ray diffraction measurement confirmed that the prepared nanostructures were in hexagonal wurtzite structure and the dopant Sm ion was incorporated into the Zn lattice. Interesting morphological changes involving a nanosheet-star-spherical transition were observed upon Sm doping and annealing, which were identified through transmission electron microscope. Optical absorption measurements showed an exciton absorption band and a band gap narrowing with respect to the Sm concentrations. The photodegradation of Acid Blue 113 under UV-A radiation by using pure and Sm-doped ZnO nanostructures showed that samarium played an important role in the significant improvement of the photodegradation efficiency and the optimum amount of Sm ion was found to be 1 mmol %. Further, the possible degradation mechanism was proposed herein.

Original languageEnglish
Pages (from-to)487-495
Number of pages9
JournalApplied Physics A: Materials Science and Processing
Issue number2
StatePublished - 30 May 2015
Externally publishedYes


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