Comparative study of Raman modes active, emission bands and thermal features of GS Α-Al2O3 NP’s

This work, focuses on spectroscopic features such as PL and Raman and thermal analysis such (TGA –DSC) for the nanoparticles of aluminium oxide (GS α-Al2O3) synthesizes by two plant solutions (leaves(S1) and phloem(S2)) at room temperature. In different reactions, plant extracts are mixed with metal precursor solutions, Various reactions are carried out with metal precursor solutions when plant extracts are combined with them and biomolecules are responsible for reducing metal ions and capping the bio-reduced metal nanoparticles synthesized by using plant extract. As a result, calcination of the products of powder alumna at 1800 ͦC found that the phase was α-AL2O3, analysis of PL was achieved when excited of two samples (S1 and S2) by different wavelengths at 200 nm,250nm and 300 nm, it gave at λ ex =300nm, three peaks of emission at 295 nm, 350 nm 590 for S1 and 300 nm 360 nm 590nm for S2 respectively at the Eg values 4.2,2.9,2.1eV and 4.1eV and 3.4,2.1eV from UV to the yellow range, results in thermal analysis notice that rapidly loss in the weight to reach for the stable phase of α-Al2O3. Raman active modes have seven actives for both prepared samples S1 and S2, these samples of Al2O3 can be applied in highperformance heat and dye degradation.