Abstract
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.
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The authors gratefully acknowledge the FONDECYT Postdoctoral Project No.: 3140178 and FONDECYT No.: 1130916, Government of Chile, Santiago, for the financial assistance.
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Pandiyarajan, T., Mangalaraja, R.V., Karthikeyan, B. et al. UV-A light-induced photodegradation of Acid Blue 113 in the presence of Sm-doped ZnO nanostructures. Appl. Phys. A 119, 487–495 (2015). https://doi.org/10.1007/s00339-015-9102-7
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DOI: https://doi.org/10.1007/s00339-015-9102-7