Synthesis of TiO2 nanoparticles by chemical and green synthesis methods and their multifaceted properties

Abstract In this present work, Titanium dioxide nanoparticles (TiO 2 NPs) successfully synthesized using the chemical as well as the green synthesis routine. The ethanol provoked the chemical reduction of ions. In the green synthesis, jasmine flower extract was used as a reducing and stabilizing agent because it contains alkaloids, coumarins, flavonoids. The Rutile phase of TiO 2 NPs with an average crystalline size of 31–42 nm was revealed from the XRD pattern. From the UV–Visible spectroscopy, the optically active region of TiO 2 NPs at 385 nm represents the visible region spectrum. The Ti–O–Ti and Ti–O vibration bond formation confirms the formation of TiO 2 NPs. The SEM image of TiO 2 NPs reveals that the spherical shaped NPs with randomly arranged manner. The obtained results have revealed that the property of TiO 2 nanoparticles was similar in both processes. The Photodegradation of methylene blue dye was investigated and resulted in the maximum degradation efficiency of 92% is achieved at 120 min of irradiation. The Photodegradation study shows the biosynthesized TiO 2 NPs exhibits a higher degradation efficiency compared to chemically synthesized TiO 2 NPs. The antibacterial activity of prepared TiO 2 NP’s was studied using grams-positive and gram-negative strains. The biological activities of green synthesized TiO 2 NPs are enhanced compared to the chemically synthesized TiO 2 NPs. Hence the degradation efficiency and zone inhibition layer indicate that the prepared TiO 2 NPs are the potential candidate for environmental and biomedical applications. Graphic abstract

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