Open AccessSynthesis and Characterization of Nano-TiO2 using Aqueous Extract of Erythrina variegata Leaves
Author(s) -
Jayaram Mari Selvi,
M. Murugalakshmi,
Ponnusamy Sami
Publication year - 2021
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2021.23535
Subject(s) - scanning electron microscope , crystallinity , anatase , absorbance , fourier transform infrared spectroscopy , nanoparticle , chemistry , nuclear chemistry , photocatalysis , titanium dioxide , spectroscopy , methylene blue , analytical chemistry (journal) , materials science , chemical engineering , nanotechnology , chromatography , crystallography , organic chemistry , physics , quantum mechanics , engineering , metallurgy , composite material , catalysis
In present work, the Erythrina variegata leaves extract acts as a reducing agent for the green synthesisof titanium dioxide (TiO2) nanoparticles. The characterization of the extracted TiO2 nanoparticleswere confirmed by ultraviolet spectral studies (UV-Vis), Fourier transform infrared (FT-IR)spectroscopy, X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDAX) and scanningelectron microscopy (SEM). The UV-Vis absorption spectrum exhibited maximum absorbance peakat 317.6 nm,w hich supports the formation of TiO2 nanoparticles. The optical band gap energy valuehas been determined as 2.35 eV. Further characterization by XRD supports the crystallinity and theincidence of peak at 25.28 ºC corresponds to 101 anatase form. The anatase phase TiO2 sample havingtetragonal structure with mean crystalline size was found to be 7.91 nm. Scanning electron microscopeimage supports the shape of the nanoparticles. These nanoparticles are having effective dye degradationability with various time intervals. The green synthesized TiO2 nanoparticles exhibits interestingphotocatalytic efficacy on methylene blue dye under UV irradiation (using multi-lamp photo reactor)and antibacterial activity against pathogenic organisms like Streptococci, Staphylococci, E. coli andPseudomonas aeruginosa.