Abstract
A hydrothermal method was employed to prepare the sodium niobate (NaNbO3) nanocubes. We executed time dependent experiments to illustrate the formation mechanism of sodium niobate nanocubes. It was observed that the morphology of NaNbO3 nanocubes was dependent on the reaction time and 12hr reaction time was found to be suitable. Morphology, composition, structure and optical properties of sodium niobate nanocubes were evaluated by scanning electron microscope, X-ray energy-dispersive spectrometer, X-ray diffraction and UV-visible diffuse reflectance spectrometer. The photocatalytic activity of sodium niobate was studied for photocatalytic hydrogen production. It was anticipated that the sodium niobate (NaNbO3) cubes exhibited good photocatalytic activity under UV light irradiation using lactic acid as sacrificial agent. The cytotoxicity activity of sodium niobate nanocubes was studied as well at different concentrations (5 mg/mL, 3 mg/mL, 1 mg/mL, and 0.25 mg/mL) against human colon colorectal carcinoma cell line (HCT116) by MTT assay and EC50 was found to be 1.9 mg/mL. Sodium niobate proved to be a good DPPH free radical scavenging material, tested at different concentrations. It was noticed that peak intensity at 517 nm was decreased after 30 minute incubation, further supporting the antioxidant activity. This study will be useful for design and engineering of materials that can be used in biomedical applications and in photocatalysis.
Highlights
Excess consumption of fossil fuel and increased pollution has make scientists actively looking for solutions in terms of energy and environmental issues
NaNbO3 nanocubes were prepared by hydrothermal method and morphology of the product was observed by SEM
We considered different concentration of NaNbO3 nanocubes to study the antioxidant activity
Summary
Excess consumption of fossil fuel and increased pollution has make scientists actively looking for solutions in terms of energy and environmental issues. Hydrogen is as an eco-friendly fuel and an alternative source of energy. Hydrogen is mostly used as energy source via fossil fuels and electrolysis of water, the use of latter, is economically not feasible as the process consumes high energy. Solar energy is the alternatively favored renewable energy source that can satisfy the global energy requirements.
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