MINOR RESEARCH PROJECT

SEED MONEY TO YOUNG SCIENTIST RESEARCH

(SMYSR) (GRD No. 411)

REPORT ON SMYSR PROJECT

Facile green route for the synthesis of pure and rare earth doped ZrO2: Its application in display devices and for the waste water treatment

 

Sm3+ doped nano Zirconia was synthesized by a green mediated route. The structural, optical properties, photoluminescent and photocatalytic properties of the synthetic nano materials were thoroughly evaluated. RE addition favoured cubic structure and unit cell volume of RE-modified Zirconia underwent a expansion, thus suggesting the incorporation of the RE into Zirconia lattice. All RE–zirconia samples were photocatalytically active under Sunlight exposure. In fact, 11% Sm doped ZrO2 superior under solar light to ZrO2. It also did not suffer any significant loss in the decolorization during repeated cycle tests and there was no leaching of REs from the photocatalysts, showing them to be very stable and reusable. Moreover, the resulting photocatalyst exhibit fluorescent yellow emission at lower dopant concentration and pale green color at higher dopant concentration. The quality of emitted white light was evaluated using CIE and CCT coordinates. The trend observed from Judd – Ofelt theory, confirms that the bonding of Sm3+ ions with the local host is ionic bonding and the coordination structure surrounding the RE ion has relatively high symmetry. These results suggest that RE–ZrO2 could potentially be used in environmental remediation, smart materials and display technologies.

Bio-mediated Sm doped nano cubic zirconia: Photoluminescent, Judd–Ofelt analysis, electrochemical impedance spectroscopy and photocatalytic performance, Journal of Alloys and Compounds, 685 (2016) 761-773

https://doi.org/10.1016/j.jallcom.2016.06.105

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