The La2O3 nanoparticles have been synthesized successfully with a chemical and biosynthesized method.
The optical bandgap energy and of chemically synthesized or biosynthesized (M. oppositifolia and T.
portlacaustrum leaf extract) La2O3 nanoparticles was calculated from UV-visible absorption between
5.10, 4.26 and 4.46 eV. The good polycrystalline cubic nature of synthesized La2O3 nanoparticles was
evident from the bright circular SAED pattern, consistent with the XRD outcome. It is clear that the
non-polar extracts could function as stabilizers for La2O3 nanoparticles through attachment to the
counterions. The La2O3 nanoparticles have been used as efficient photocatalyst to degrade acid black
1 dye under sunlight irradiation. Besides, this biocatalyst showed excellent ability to degrade
biosynthesized La2O3 nanoparticles (T. portlacaustrum) under visible light irradiation 87%. Synthesis
of La2O3 nanoparticles by green chemistry process presented good antibacterial activity against
Gram-negative and Gram-positive bacteria.
Comparison of bio CeO2-Nps prepared using Trianthema Portulastrum leaf extract with chemical CeO2-Nps is of interest. The ultraviolet - visible, x-ray diffraction, HR - TEM, FT - IR, and photoluminescence studies were conducted with CeO2-Nps. UV–Maximum absorptionat 292 nm was completed using UV-visible spectrum. The HR–TEM images showed 38 nm bio CeO2-Nps with spherical morphology. This showed the polycrystalline character of CeO2-Nps similar to XRD data. The presence of metal oxide is confirmed by FT - IR analyses. The CeO2-Nps showed the potential photocatalytic activity for Acid black 1 color degradation after exposure to sunlight. Chem and bio CeO2-Nps have a degradation rate of 86.66 and 94.33%, respectively for acid black 1 dye. The synthesized CeO2-Nps are also evaluated for antibacterial and antioxidant activity. The bio CeO2-Nps has antibacterial activity for Pseudomonas aeruginosa (17 ± 0.56 mm) and Staphylococcus aureus (16 ± 0.24 mm) at low concentrations of 100 μl. The CeO2-Nps bio showed high inhibition of radical DPPH IC50 μg/ml, at 95.17 ± 21. Thus, we show that CeO2-Nps have environmentally friendly properties that are useful for dye degradation with antimicrobial and antioxidant activities.
In the present work, two different methods (sol-gel and biological) were adopted for synthesis of ZnO nanoparticles. The synthesized
nanoparticles were characterized for its optical, structural, photocatalytic, biological activities. Both synthesized nanoparticles demonstrated
a wurtzite hexagonal structure. The morphological analysis revealed that most of the particles spherical shape. The photocatalytic activity
of the synthesized nanoparticles was determined through the degradation of acid black 1 dye in which the biosynthesized ZnO NPs provided
good performance as compared to that the chemically synthesized ZnO NPs. Furthermore, antibacterial activity, the zone of inhibition of
bacterial growth was higher in the biosynthesized ZnO NPs and also antioxidant activity.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.