Green Synthesis Of TiO2 Nanoparticles Research Articles

EMIM] BF4 ionic liquid-mediated synthesis of TiO2 nanoparticles using Vitex negundo Linn extract and its antibacterial activity

In the present investigation, we report the green synthesis of titanium dioxide nanoparticles (TiO2 NPs) using an extract of Vitex negundo Linn, with and without ionic liquid (1-ethyl-3-methylimidazolium tetrafluoroborate-[EMIM]+ BF4−) by an eco-friendly method. Ionic liquids as a designer solvent act as a self-assembling template and play a very important role in synthesis of TiO2 nanoparticles. XRD analysis, displays that the both TiO2 NPs confirmed the crystalline nature with the average crystalline size of 10nm and 19nm in the form of anatase phase structure. The spherical and rod shaped morphologies are confirmed by TEM analysis, and the average particle size is about 26nm and 15nm. The Ti–O stretching bands are observed at 453.47cm−1–779.32cm−1 from the FT-IR spectrum. Further, we have explored the antibacterial activity of TiO2 NPs against Staphylococcus aureus (gram positive) and Escherichia coli (gram negative) organisms. Thus, these green synthesized TiO2 nanoparticles can be used for a broad spectrum of biological applications.

Biomediated green synthesis of TiO2 nanoparticles for lithium ion battery application

Abstract Simple, green and cost effective method is used for the synthesis of TiO2 nanoparticles, wherein remnant water (ideally kitchen waste) collected from soaked Bengal gram beans (Cicer arietinum L.) extract is reacted with TiCl4. Biosynthesized TiO2 (Bio-TiO2) nanoparticles with uniform size distribution (free of aggregation even after calcination) were obtained as a result of the stabilizing molecules naturally present in the extract. The morphology, crystal structure and phase composition, specific surface area and pore size distribution of Bio-TiO2 were systematically investigated by X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and BET surface area measurement system. Li-insertion properties were evaluated as anodes in the half-cell configuration (Li/Bio-TiO2) and it is found to demonstrate reversible insertion of 0.61 mol at a current density of 33 mA g−1. The half-cell displayed a good cyclability and retained 98% of its initial reversible capacity even after 60 galvanostatic cycles.

Antibacterial Effect of Green Synthesized TiO2 Nanoparticles

Antibacterial Effect of Green Synthesized TiO₂ Nanoparticles

Green synthesis of TiO2 nanoparticles by using aqueous extract of Jatropha curcas L. latex

Present study deals with a green synthesis of TiO2 nanoparticles by using 0.3% aqueous extract prepared from latex of Jatropha curcas L. TiO2 nanoparticles were characterized by X-ray diffraction (XRD), Selected Area Electron Diffraction (SAED), Transmission Electron Microscopy (TEM), Energy Dispersive Analysis of X-rays (EDAX) and Fourier Transform Infrared Spectroscopy (FTIR). Fourier Transform Infrared Spectroscopy (FTIR) were performed to find the role of curcain (enzyme), cyclic peptides namely curcacycline A (an octapeptide) and curcacycline B (a nonapeptide) as a possible reducing and capping agents, present in the latex of J. curcas L. The average size of TiO2 nanoparticles was found to be in the range of 25 to 100nm. Our result shows that there are two broad categories of nanoparticles, first having diameter from 25 to 50nm which are mostly spherical in shape and second having some larger and uneven shapes.