Green Synthesis Of TiO2 Nanoparticles Research Articles

Evaluation of Antibacterial Potential of Biosynthesized Plant Leave Extract Mediated Titanium Oxide Nanoparticles using <i>Hypheae Thiebeace</i> and <i>Anannos Seneglensis</i>

The need for new antimicrobial agent has drawn attention on developing new and emerging materials based on nanoparticles with antimicrobial activity. The aim of this research was to evaluate the antibacterial activity of nanoparticles of titanium dioxide. A green synthesis of TiO2 nanoparticles was done using a plant extract of H. thelbiecea and Ananos seneglensisa The presence of various photochemical like flavonoids, steroids, polyphenols, and terpenoids was investigated by following standard biochemical methods. The titanium oxide nanoparticles (TiO2 NPs) synthesized was confirmed by their change of colour to brown and reddish brown due to the phenomenon of surface Plasmon resonance. The characterization studied was done by UV-vis spectroscopy, scanning electron microscopy (SEM), X-Ray diffraction (XRD) and Fourier Transmission infrared spectroscopy (FTIR). The green synthesized TiO2 NPs excitation was confirmed using UV–Vis spectrophotometer at 270 and 290 nm. SEM revealed that the synthesized TiO2 NPs are spherical and crystalline in nature. The overall sizes are 40 and 50 nm for H. thelbiecea and Ananos respectively. FTIR spectroscopy analysis showed the presence of flavonoid, polyphenols and amide groups likely to be responsible for the green synthesis of titanium oxide nanoparticles using H. thelbiecea and Ananos seneglensis aqueous leaf extracts .The XRD pattern showed the characteristic Bragg peaks of (111), (200), (220) and (311) facets of the anatase titanium oxide nanoparticles and confirmed that these nanoparticles are crystalline and spherical in nature. The two plants used to synthesized titanium oxide nanoparticle (H. thelbiecea and ananos seneglensisa) showed good antimicrobial activity against clinically important pathogens.. The antimicrobial study of TiO2 NPs shows that 20 μg/ml TiO2 NPs is effective for complete inactivation of Gram positive, Gram negative as well as fungal cultures. This effective microbial inactivation is mainly attributed to its ability to cause damage to the cell membrane.Keywords: Titanium oxide, phytochemicals, antimicrobial activity, H. thelbiecea, Ananos seneglensisa

Green synthesis of TiO2 nanoparticles using Bixa orellana seed extract and its application for solar cells

Mesoporous anatase TiO2 nanoparticles are the best photoanode materials for high performance DSSC. Chemical and physical methods used for the preparation of TiO2 nanoparticles suffer with environment related issues e.g. use of toxic solvents, hazardous by-products and consumptions of high energy. We have synthesized mesoporous anatase TiO2 nanoparticles from Titanium (IV) butoxide solution using Bixa orellana seed extract and further used it for making DSSC photoanode. The method offers environment friendly, cheaper and efficient DSSC. Structure, morphology, size and porosity of TiO2 nanoparticles were characterized using XRD, SEM, TEM and N2 sorption measurements. The amount of dye loading by TiO2 was obtained using desorption technique which revealed much higher dye loading for the plant seed grown nanoparticles (G-TNP). TNP and G-TNP demonstrated photovoltaic conversion efficiencies 1.03% and 2.97% respectively. This study therefore demonstrates that the synthesized mesoporous anatase TiO2 naoparticles can serve as promising photoanode materials for DSSC applications.

Study on Photo-Catalytic and Antimicrobial Activity of Green Synthesized TiO2 Nanoparticles Coated Vitrified Tiles

In the current study, a facile and eco-friendly method has been developed for the synthesis of titanium dioxide nanoparticles from titanium isopropoxide solution using <i>Datura metel</i> (Vellai Umathai) leaves and orange peel extract. Silver nanoparticles (60 nm) and silver nanoplates (130 nm) have been synthesized and characterized using UV-visible spectroscopy, X-ray diffractometer (XRD), atomic force microscopy (AFM) and scanning electron microscopy (SEM). The silver nanoparticles are doped with TiO₂ nanoparticles. The photocatalytic activity of Ag nanoparticles and nanoplates doped TiO₂ nanoparticles coated on vitrified tiles was investigated, wherein, degradation of methylene blue, rapidly on exposure to sunlight was observed. Analysis of the antimicrobial activity measured using colony forming units showed a 4-log reduction in the growth of the Gram-negative bacteria and a 5-log reduction in the growth of the Gram-positive bacteria.<div><br></div>

Facile and eco-friendly synthesis of TiO2 NPs using extracts of Verbascum thapsus plant: an efficient photocatalyst for reduction of Cr(VI) ions in the aqueous solution

In this study, a fast and green synthesis of TiO2 nanoparticles (TiO2 NPs) is investigated using Verbascum thapsus (V. thapsus) plant aqueous extract as a reducing and stabilizing agent at room temperature. The TiO2 NPs formation and the optical properties were followed by the absorption spectra in ultraviolet–visible spectroscopy. This spectrum showed a strong absorption peak of around 356 nm. Moreover, the green synthesized TiO2 NPs were characterized by different techniques, for example, X-ray powder diffraction was used to analyze the phase and crystal structure, Fourier-transform infrared spectroscopy was conducted to know the functional groups involved in the NPs TiO2, and transmission electron microscopy was carried out to determine the morphology and size. The results showed a successful synthesis and anatase phase with spherical shape and smaller than 13 nm and also the presence of a few phytochemicals of the extracts around the synthesized TiO2 NPs, which acted as stabilizing the NPs. X-ray photoelectron spectroscopy analysis was carried out to characterize TiO2 NPs for evaluating the chemical states of the elements. The catalytic activity of the green synthesized TiO2 NPs was examined on photoreduction of Cr(VI) ions in the aqueous solution. The found conditions are as follows: [TiO2 NPs] = 750 mg/L, pH = 3.5, T = 25 °C and after 120 min of reaction photocatalytic reduction of Cr(VI) ions, 79.6% reduction efficacy (RE) was achieved. It was found that the reduction kinetic fitted the pseudo-first-order model. Finally, the photocatalyst reusability was investigated after five times of recovery; RE was reduced to 78.1%.

Expanding horizon: green synthesis of TiO2 nanoparticles using Carica papaya leaves for photocatalysis application

The present research findings introduce a green as well as facile synthesis of TiO2 NPs using Carica papaya leaf extract for the first time which has potential application as a photocatalyst. XRD analysis reveals the tetragonal crystal structure for TiO2 NPs and exposes their crystalline nature as well as anatase phase evolution. FE-SEM images elucidate the cages-like morphology and provide the diametric measurements of the spherical TiO2-NPs which are well accounted to be less than 20 nm with the help of TEM images. The average particle size is calculated and found to be 15.6 nm. FTIR spectrum shows the absorption band of Ti–O stretching mode in the fingerprint region 750 cm−1 to 650 cm−1. BET results reveal the mesoporous nature of TiO2 particles with surface area and mean pore size of 81.653 m2g−1 and 8.0615 nm, respectively. UV–visible spectrum shows a strong absorption peak at a wavelength of 303 nm and the corresponding band gap energy value is calculated and found to be 3.85 eV. Remarkable photocatalytic efficiency (91.19%) towards photodegradation of RO-4 dye is exhibited by TiO2 NPs within 180 min of incubation under UV exposure at the optimum dosage of 25 mg.

Green synthesis of TiO2 nanoparticles using Cajanus cajan extract and their use in controlling the fouling of ultrafiltration PVDF membranes

Polyvinylidene fluoride (PVDF)/TiO2 composite ultrafiltration membranes were fabricated using different loadings of TiO2 NPs synthesized by the green route using an extract of Cajanus cajan. XRD analysis confirmed the synthesis of TiO2 nanoparticles of size 10 nm using Debye Scherrer’s equation. High hydrophobicity of PVDF restricts its successful application due to fouling in the membrane. Therefore, composite membranes were prepared via the phase inversion route and characterized by contact angle and permeation tests. The BSA filtration experiments revealed that membrane with 0.5 wt% of TiO2 exhibits excellent hydrophilicity, permeation flux, high rejection ratio, and good antifouling performance. It was observed that the fouling characteristic of the membrane is governed by the surface roughness of the membrane, and with increasing loading of TiO2 the surface roughness decreases indirectly enhancing the antifouling property of membranes. The adsorption capacity of bovine serum albumin on the membrane surface decreased from 2.85 to 2.15 mg cm−2 as the TiO2 loading increased from 0 to 0.02 g TiO2/g PVDF. Fouling was found due to cake formation in ultrafiltration and can be explained by Hermia’s fouling model suggesting that the solutes are not deposited into the pores, which indicates that the fouling process is physically reversible.

Investigation of Photocatalytic and Seed Germination Effects of TiO2 Nanoparticles Synthesized by Melia azedarach L. Leaf Extract

The captivating properties and versatile applications of TiO2 nanoparticles make them one of the emerging and widely used nanomaterials in current era. Green synthesis of nanoparticles is normally exploited to ensure environment friendly route and as potential candidate in their applications. In this work, owing to the sensitive applications of TiO2 nanoparticles in water purification and agriculture, green synthesis was preferred using leaf extract of Melia azedarach L. as reducing and capping agent. Optical, structural and morphological properties of the synthesized nanoparticles were examined by UV–Vis spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM) respectively, which revealed their crystallinity and spherical shape with 50–71 nm size. Functional groups responsible for the effective fabrication and stability of nanoparticles were indicated by Fourier transform infrared (FTIR) spectroscopy and purity of synthesized nanoparticles was analysed by Energy Dispersive X-ray (EDX) spectroscopy. Nanoparticles were found to be pure, well dispersed and rutile in nature. TiO2 nanoparticles exhibited efficient degradation of Eosin dye, demonstrated as prototype of polluted water. Moreover, TiO2 nanoparticles were also found quite efficient in enhancing germination of Pennisetum glaucum seeds and represented germination index of 89.3. Therefore, green synthesized TiO2 nanoparticles by Melia azedarach L. extract can be employed as fertilizing and catalysing agents in the field of food and agriculture and as decontaminating and purifying agents in the field of environmental purification as future prospects.

Multifunctional Applications of Microwave-Assisted Biogenic TiO2 Nanoparticles

TiO2 nanoparticles were prepared by a microwave-assisted green method using Andrographis paniculata as fuel. XRD, Raman, FESEM with EDS, TEM and UV-DRS have been used for characterization of TiO2 nanoparticles. XRD exhibits a tetragonal structure with the average crystallite size of 19 nm. From Raman studies, the peaks at 196 (Eg), 395 (B1g), 514 (A1g) and 639 (Eg) are revealing the anatase phase of TiO2. FESEM and TEM images confirm the nanoparticles with average particle size are 25 nm. Optical bandgap of biogenic TiO2 nanoparticles is 3.27 eV. Photoluminescence spectrum of TiO2 nanoparticles showed blue and green emissions. The photocatalytic degradation study of biogenic TiO2 nanoparticles was investigated against the Rose Bengal (RB) dye under UV light irradiation. Microwave-assisted green synthesized TiO2 nanoparticles showed an excellent photocatalytic activity (RB dye). Antibacterial activity (disc diffusion method) of microwave-assisted biogenic TiO2 nanoparticles is studied against foodborne pathogens. TiO2 exhibits anti-lung cancer (human lung cancer A549: IC50: 24.96 µg/mL) activity along with biocompatibility.

Biosynthesis of TiO2 nanoparticles and their application for treatment of brain injury-An in-vitro toxicity study towards central nervous system

In the current study, a facile green synthesis of TiO2 nanoparticles (NPs) utilizing the leaf extract of Lippia citriodora as a stabilizing and reducing agent was reported. The prepared TiO2 NPs were studied using XRD, UV, HRTEM, FTIR, Raman and EDS analysis. TEM analysis confirmed that the nanoparticles size is in 20–40 nm range. FTIR and UV–Visible spectra represented the TiO2 NPs formation. Similarly, the analysis of XRD and EDS validated the crystalline rutile structure of TiO2NPs formed. In addition, this investigation was shown to examine the TiO2NPs toxicity on the CNS central nervous system in vitro. In the extracted cell cultures from the rats ECB embryonic cortical brain, substantial decline in the neuroblasts has been noticed once after incubating with TiO2NPs for 24 h to 96 h (5 to 20 μg/ml). This study also demonstrates the decline of neuroblast proliferation. In the conclusion, our investigation illustrated evidently the TiO2NPs toxic effect on the neuronal cells and rat brain also mentioned about toxicity effects of TiO2 which were not yet described, for example the decline in vitro neuroblast proliferation.

Genotoxic and cytotoxic activity of green synthesized TiO2 nanoparticles

Nowadays, nanomaterials that are smaller than 100 nm in size are very attractive owing to their enhanced physicochemical properties. Although they have been used widely for industrial applications, their toxicity still remains a problem. This article is a new record of the synthesis of titanium dioxide nanoparticles (TiO2 NPs) by a Mentha aquatica leaf extract and determination of its toxicity to rat marrow mesenchymal stem cells. In this study, we aimed to determine the genotoxic and cytotoxic effects of biologically synthetized TiO2 NPs. The characteristic peak of the nanomaterial was observed at 354 nm. The mean size of the nanomaterial was measured to be 69 nm from SEM images. According to zeta analysis, the surface charge of the nanomaterial was − 37.6 mV. The crystalline structure of the nanomaterial was determined using XRD analysis. It was concluded that the obtained nanomaterial was TiO2 The results of the FT-IR analysis showed that the functional groups that were found in the plant extract could play an important role in the formation and stabilization of TiO2 NPs. The effective size of the TiO2 NPs was found to be 304 nm using DLS analysis. The TGA analysis results showed that the total mass loss was 4% at 900 °C. According to DNA cleavage analysis results, TiO2 NPs cause damage to the plasmid pBR322 DNA in a concentration-dependant matter. It has been noted that TiO2 NPs lead to decreased cell viability during increased time and concentration of applications on rat marrow mesenchymal stem cells. It has also been determined that bulk TiO2 causes a greater reduction in the stem cell viability compared to the biosynthesized NPs. The obtained results could be useful for further application and toxicity studies.

A Review on Novel Eco-Friendly Green Approach to Synthesis TiO2 Nanoparticles Using Different Extracts

The inspiring applications of the metal oxide nanoparticles are capturing the interest of researchers worldwide. Different physical and chemical methods are being adapted to synthesize these nanoparticles. The green synthesis is a fruitful emerging process that is environment friendly and low-cost as well. During the last decade, a plenty of work on green synthesis of TiO2 nanoparticles had been practiced. In this review, a compact data on the green synthesis of TiO2 nanoparticles from the plant extracts is summarized. This review will also mention the amendable features for the qualitative and quantitative enhancement in the product and the reliable application perspectives.

Biogenic synthesis from Prunus × yedoensis leaf extract, characterization, and photocatalytic and antibacterial activity of TiO2 nanoparticles

Green synthesis of TiO2 nanoparticles (NPs) from Prunus × yedoensis leaf extract (PYLE), and their application for removal of phosphate and their antibacterial activity, were studied for the first time. NPs were obtained using a green chemistry approach from 0.1 M TiO2 and PYLE at ratio of 1:1 (v/w). Initial confirmation of production of TiO2 NPs was provided by a color change from white to light yellow, then calcination was performed at 500 °C for 1 h. The TiO2 NPs were characterized using various analytical techniques such as ultraviolet–visible (UV–Vis) spectroscopy, X-ray diffraction analysis, Fourier-transform infrared spectroscopy, Raman spectroscopy, UV–Vis diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy. The results indicated that the optimal amount of TiO2 NPs for removal of phosphate was 10 mg/l (10 ppm) with duration of 25 min. Furthermore, the antibacterial activity of TiO2 NPs was also investigated using two different bacteria (Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli) in aqueous medium. The results revealed highly efficient sunlight-driven photocatalytic and antibacterial activity of TiO2 NPs.

Green synthesis of TiO2 nanoparticles using leaf extract of Jatropha curcas L. for photocatalytic degradation of tannery wastewater

Green synthesis is a simple, eco-friendly and emerging approach of synthesizing nanoparticles (NPs) and currently, attracting scientific community from around the world. The objective of the present study was to synthesize green titanium dioxide (TiO2) NPs and evaluate its performance for the photocatalytic treatment of TWW after the secondary (biological) treatment process. TiO2 NPs was synthesized using leaf extract of the biodiesel plant, Jatropha curcas L. in a one-step at room temperature to examine its treatability for tannery wastewater (TWW). Moreover, the green synthesized TiO2 NPs was further characterized by UV–Visible spectrophotometer, Field Emission Scanning Electron Microscopy (FESEM), X-ray Energy Dispersive Spectroscopy (EDS), Fourier Transform Infrared (FT-IR) spectroscopy, X-ray Diffraction (XRD), Dynamic Light Scattering (DLS), Brunauer-Emmett-Teller (BET) and Barret-Joyner-Halenda (BJH) analysis. Results confirmed the synthesis and anatase phase of the spherical TiO2 NPs and also unfold the presence of phytochemicals in leaf extract, which might involve in the capping/stabilization of NPs. Further, the green synthesized TiO2 NPs was applied for the first time to testify its potential for the simultaneous removal of chemical oxygen demand (COD) and chromium (Cr) from secondary treated TWW. During the photocatalytic treatment of wastewater in a self-designed and fabricated Parabolic Trough Reactor (PTR), 82.26% removal of COD and 76.48% removal of Cr from TWW was achieved upon the treatment with green synthesize TiO2 NPs, and thus, successfully employed for the wastewater treatment. Overall, the green synthesized TiO2 NPs demonstrated the astounding potential for the in-situ treatment of TWW as an alternative clean-green treatment solution.

Novel microbial and root mediated green synthesis of TiO2 nanoparticles and its application in wastewater remediation

AbstractBACKGROUNDRhizosphere is a natural phenomenon which has been identified as plant assisted bioremediation and comprises of bacteria, fungi and actinomycetes along the root zone. Rhizosphere can be enhanced by providing the nutrients and favourable environmental condition and is considered an ecological remediation unit. In the present study, mycorrhizal sorghum roots and bacterial strains present therein have been used as a natural source for the synthesis of photocatalytic TiO2 nanoparticles.RESULTSThe microorganisms from the root zone of the rhizosphere were isolated and identified by 16srDNA. The microorganisms Micrococcus lylae (MF1), Micrococcus aloeverae (MF2), Cellulosimicrobium sp. (MF3), their consortium and the root extracts were found to be effective for synthesis of TiO2 nanoparticles. The synthesized TiO2 nanoparticles were characterized by XRD, TEM and FTIR. These synthesized nanoparticles were used for photodegradation of methyl orange dye under the influence of UV light in a reactor.CONCLUSIONThe rhizospheric microorganisms and roots have been established as a novel natural source for synthesis of TiO2 nanoparticles and were found to be effective for the degradation of toxic methyl orange dye. This green synthesis of TiO2 nanoparticles is beneficial for hazardous wastewater remediation to clean up the environment. © 2017 Society of Chemical Industry

Obtaining titanium dioxide nanoparticles with spherical shape and antimicrobial properties using M. citrifolia leaves extract by hydrothermal method

In this work, we synthesized titanium dioxide (TiO2) nanoparticles using leaf extract of Morinda citrifolia (M. citrifolia) by the advanced hydrothermal method. The synthesized TiO2 nanoparticles were characterized by X-ray diffraction (XRD), Fourier transmission infrared (FT-IR), Ultraviolet-visible diffuse reflectance (UV–Vis DRS), Ultraviolet-visible spectroscopy (UV–Vis), Raman spectroscopy, and scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM with EDX) techniques. The XRD major peak at 27.3° corresponds to the (110) lattice plane of tetragonal rutile TiO2 phase and average crystalline size of nanoparticles is 10nm. The FT-IR result confirmed that TiO2 nanoparticles and the presences of very few amount of anthraquinone and phenolic compounds of the leaf extract. The obtained nanoparticles were also characterized by UV–Vis DRS absorption spectroscopy and an intense band at 423nm clearly reveals the formation of nanoparticles. SEM images with EDX spectra clearly reveal the size of the nanoparticles, between 15 and 19nm in excellent quasi-spherical shape, by virtue of stabilization (capping) agent. The presence of elements-titanium and oxygen was verified with EDX spectrum. Furthermore, the inhibitory activity of green synthesized TiO2 nanoparticles was tested against human pathogens like Staphylococcus aureus, Escherichia coli, Bacillus subtilis, Pseudomonas aeruginosa, Candida albicans, and Aspergillus niger by the agar well-diffusion method. The TiO2 nanoparticles exhibited superior antimicrobial activity against Gram-positive bacteria, demonstrating their antimicrobial value against pathogenic diseases.

Pulsed Laser Ablation-Induced Green Synthesis of TiO2 Nanoparticles and Application of Novel Small Angle X-Ray Scattering Technique for Nanoparticle Size and Size Distribution Analysis.

This paper aims to introduce small angle X-ray scattering (SAXS) as a promising technique for measuring size and size distribution of TiO2 nanoparticles. In this manuscript, pulsed laser ablation in liquids (PLAL) has been demonstrated as a quick and simple technique for synthesizing TiO2 nanoparticles directly into deionized water as a suspension from titanium targets. Spherical TiO2 nanoparticles with diameters in the range 4–35 nm were observed with transmission electron microscopy (TEM). X-ray diffraction (XRD) showed highly crystalline nanoparticles that comprised of two main photoactive phases of TiO2: anatase and rutile. However, presence of minor amounts of brookite was also reported. The traditional methods for nanoparticle size and size distribution analysis such as electron microscopy-based methods are time-consuming. In this study, we have proposed and validated SAXS as a promising method for characterization of laser-ablated TiO2 nanoparticles for their size and size distribution by comparing SAXS- and TEM-measured nanoparticle size and size distribution. SAXS- and TEM-measured size distributions closely followed each other for each sample, and size distributions in both showed maxima at the same nanoparticle size. The SAXS-measured nanoparticle diameters were slightly larger than the respective diameters measured by TEM. This was because SAXS measures an agglomerate consisting of several particles as one big particle which slightly increased the mean diameter. TEM- and SAXS-measured mean diameters when plotted together showed similar trend in the variation in the size as the laser power was changed which along with extremely similar size distributions for TEM and SAXS validated the application of SAXS for size distribution measurement of the synthesized TiO2 nanoparticles.

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.