Luminescent TiO 2 nanoparticles synthesized from Mollugo Oppositifolia and Trianthema Portulacastrum for dye degradation, antimicrobial and antioxidant properties.

In modern times, nanoparticles have materialized as indispensable things in contemporary medicine, with a variety of uses in clinical, drug and gene conveyance. In the present study, TiO ₂ nanoparticles (NPs) prepared from the leaf extracts of Mollugooppositifolia and Trianthema portulacastrum were compared with the chemical TiO ₂ -NPs for antibacterial and antioxidant activities and environment-friendly nature through various tools like the UV-visible, X-ray diffraction with the aid of other analytical techniques like HR-TEM, Fourier transform infrared (FT-IR) and photoluminescence spectroscopic techniques. The morphology of green TiO ₂ -NPs is found to be spherical, which is supported by HR-TEM images. FT-IR analyses and X-ray diffraction data ensure that the polycrystalline characters of TiO ₂ -NPs alike to the presence of metal oxide. TiO ₂ -NPs showed a possible photocatalytic activity for the ruin of acid black 1 dye after disclosure to sunlight. The chemical and green methods of TiO ₂ -NPs have acid black 1 dye decomposition rates of 86.66% and 94.33%, respectively. The synthesized TiO ₂ -NPs are also assessed for antimicrobial and antioxidant activities. Green TiO ₂ -NPs exhibit antibacterial activity against Pseudomonas aeruginosa (17 + 0.56 mm) and Staphylococcus aureus (16 + 0.24 mm) at concentrations as low as 100 μL. The green TiO ₂ -NPs showed high inhibition of DPPH I radical (50 μg/m) at 95.17 ± 21. Therefore, TiO ₂ -NPs represent eco-friendly properties that aid in the degradation of dyes due to their antioxidant activity.
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