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2018 | 17 | 1-15
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Synthesis, characterization, structural and optical properties of titanium-dioxide nanoparticles using Glycosmis cochinchinensis Leaf extract and its photocatalytic evaluation and antimicrobial properties

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Present study reports an Eco-friendly, nontoxic, inexpensive and low cost effective method for green synthesis of titanium dioxide nanoparticles using Glycosmis cochinchinensis leaf extract was developed. X-Ray diffraction (XRD), Ultraviolet spectral studies (UV-Vis), Fourier transform infrared (FTIR) spectroscopy, Scanning electron microscopy and Energy dispersive spectrometry (SEM–EDS) and Transmission electron microscopy (TEM) were used to characterize the TiO2 nanoparticles. The Application of TiO2 nanoparticles, Photocatalytic evaluation and were studied antimicrobial activity. XRD studies indicated that the titanium dioxide nanoparticles were crystalline in nature anatase phases. TiO2 nanoparticles exhibited maximum absorbance peak at 430 nm in UV-Vis spectroscopy and the band gap energy was to be found 3.02 eV. FTIR spectral studies confirms the existence of flavonoids and proteins in as the stabilizing agent of the TiO2 nanoparticles. The SEM and TEM images indicated that the morphology of the product is spherical nanoparticles with an average particle size of 40 ±5 nm with standard deviation. Antibacterial activity of the TiO2 nanoparticles was tested against gram positive bacteria (S. saprophyticus and B. subtilis) and gram negative bacteria (E. coli and P. aeruginosa) Maximum zone of inhibition was observed against gram negative bacteria. Antifungal activity of TiO2 nanoparticles was tested against Aspergillus niger and Trichoderma reesei. Maximum zone of inhibition was found to be 60 mm against T.reesi. Hence, Glycosmis cochinchinensis leaf extract green synthesized TiO2 nanoparticles are proven to be effective antimicrobial agent.
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