| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1230063 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2015 | 10 Pages |
•Synthesis of various morphologies of Y2O3: Tb3+ NPs by bio-mediated route.•NPs were characterized by employing PXRD, SEM, PL, UV–visible and TEM studies.•Y2O3: Tb3+ nanophosphor could be a promising candidate for warm green LEDs.•Prismatic shape Y2O3: Tb3+ (3 mol%) exhibited significant antibacterial activity.
The study reports green mediated combustion route for the synthesis of Tb3+ ion activated Y2O3 nanophosphors using Aloe Vera gel as fuel. The concentration of Tb3+ plays a key role in controlling the morphology of Y2O3 nanostructures. The formation of different morphologies of Y2O3: Tb3+ nanophosphors were characterized by PXRD, SEM, TEM and HRTEM. PXRD data and Rietveld analysis evident the formation of single phase Y2O3 with cubic crystal structure. The influence of Tb3+ ion concentration on structural morphology, UV–visible absorption and PL emission were investigated systematically. The PL emission of Y2O3: Tb3+ (1–11 mol%) nanophosphors were studied in detail under 271 and 304 nm excitation wavelengths. The CIE coordinates lies well within green region and correlated color temperature values were found to be 6221 and 5562 K under different excitations. Thus, the present phosphor can serve as an excellent candidate for LEDs. Further, prismatic Y2O3: Tb3+ (3 mol%) nanophosphor showed significant antibacterial activity against Pseudomonas desmolyticum and Staphylococcus aureus. The present study successfully demonstrates Y2O3: Tb3+ nanophosphors can be used for display applications as well as in medical applications for controlling pathogenic bacteria.
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