Journal of Environmental Nanotechnology

Journal Information
ISSN / EISSN : 2279-0748 / 2319-5541
Published by: Journal of Environmental Nanotechnology (10.13074)
Total articles ≅ 405
Filter:

Latest articles in this journal

M. Kumaresan M. Kumaresan
Journal of Environmental Nanotechnology, Volume 10, pp 25-29; https://doi.org/10.13074/jent.2021.03.214433

Abstract:
In this study, natural colours were produced from the flower of Tecoma capensis. The dyes were extracted from the petal part of the plant using solvent extraction method of acidified methanol. The natural colours were then converted into powder form that is in nano size scale using a ball mill grinder. Cotton fabrics were used as the substrate and dyed using several natural and synthetic mordant. The use of different solvents for extraction and mordant for dyeing resulted in different colour shades on the cotton fabrics. The color fastness to washing tests revealed colour fastness to washing ranging from 4 - 4/5 and the change in color ranging from 2/3 - 3/4. The findings will benefit and promote the dyeing and printing industry.
M. Rukmangathan M. Rukmangathan
Journal of Environmental Nanotechnology, Volume 10, pp 08-13; https://doi.org/10.13074/jent.2021.03.211429

Abstract:
The major product, carboxylic acid, is also revealed in the product review. The oxidation kinetics mechanism proposed is consistent with observed kinetic data. The reactions were monitored potentiometrically up to 70% completion using a platinum-saturated calomel electrode assembly to track the potentials of the reaction mixture containing varying concentrations of the [CBI] / [BI] couple (BI = benzimidazole) at regular intervals. Using linear plots of log(Et – Eα) versus time, the pseudo-first-order rate constants,k1, were estimated (r0.999)The reactions were found to be first-order, each with respect to [amino acids] and [oxidant]. The rates of the reactions decreases with the added HClO4, and the order in [HClO4] was inverse fractional. The rate of reaction decreases as the dielectric constant of the solvent medium decreases, indicating a dipole-dipole reaction. Electrolytes, such as sodium perchlorate, have little effect on reaction rates. The addition of benzimidazole, one of the reaction ingredients, slowed down the reaction rates. When acrylonitrile was applied to the reaction mixture, no polymerization occurred. The thermodynamic parameters were measured after the kinetic runs were carried out at four different temperatures. The results of the reaction were carboxylic acid, ammonia, and carbon dioxide, according to the report. The most likely reactive species have been identified as HOCl. The observed kinetic effects that have been derived are compatible with a fitting mechanism.
, K. Kandasamy K. Kandasamy
Journal of Environmental Nanotechnology, Volume 10, pp 06-09; https://doi.org/10.13074/jent.2021.06.212436

Abstract:
The hydrothermal method was used to synthesize hexagonal 3-5 nm CdS QDs with Delonix elata leaves aqueous extract as a capping agent. The synthesized CdS QDs were characterized by FTIR, UV-Vis, XRD, FESEM spectroscopy. The anticorrosion activity of CdS QDs coated Zn plate was exanimated under 1 M HCl, 6 M KOH, 3.5% NaCl electrolytic medium. The best corrosion resistance was achieved through the application of the CdS QDs coating on the Zn metal surface.
S. Karthikeyan S. Karthikeyan, M. Sujatha M. Sujatha, N. Hemalatha N. Hemalatha
Journal of Environmental Nanotechnology, Volume 10, pp 10-15; https://doi.org/10.13074/jent.2021.06.212437

Abstract:
Synthesis and characterization of MWCNTs from used natural precursor of Pine oil & catalytic supported materials by spray pyrolysis method. This study also includes impact of MWCNTs on carbon fiber reinforced epoxy hybrid Nano composite. MWCNTs prepared over Fe, Co & Mo as catalytic support on Silica with Pine oil at three various temperatures. Characterization studies such as SEM, HR-TEM, RAMAN taken for prepared MWCNTs using Pine oil at three different temperatures 550°C, 650°C & 750°C above studies clearly shows that MWCNTs has good morphology and well-graphitization at 650°C with better yield. Also investicate the mechanical properties such as Tensile strength and modulus, Flexural strength and modulus of MWCNTs filled and unfilled carbon fiber reinforced epoxy hybrid Nano composites. Thermal properties are studied by using Thermo gravimetric analysis (TGA) for various wt. % of MWCNTs. Water absorption & chemical resistance tests also taken for MWCNTs composite material to know the capability of resistance in water absorption and chemicals. The findings of this study encourage MWCNTs & their composite materials may be used to several areas with high efficiency.
, J. Rajesh J. Rajesh, G. Rajagopal G. Rajagopal
Journal of Environmental Nanotechnology, Volume 10, pp 16-26; https://doi.org/10.13074/jent.2021.06.212438

Abstract:
The ligand 1-(3-ethoxy-2-hydroxybenzilidene-4-phenylsemicarbazide), (L1) was synthesized and characterized with the help of Infra-red, Ultra-violet, 1HNMR spectroscopy and X-ray crystallography. The spectral data also indicate that the ligand coordinates through the phenolic oxygen and the azomethine nitrogen atoms. Crystal data revealed that the semicarbazone act as bidentate ligand, making use of azomethine nitrogen atom and oxygen atom for co-ordination to the central metal atom. The Ligand L1 have been screened for their antibacterial activity against gram positive bacteria Staphylococcus aureus and gram negative bacteria Escherichia coli and Pseudomonas aeruginosa.The ligand L1 exhibited appreciable activity against gram positive bacteria Staphylococcus aureus and it is resistant to the fungal species such as Candida albicans, Aspergillus niger and Macrophonia phaseolina. The free ligand L1also shows higher IC50 values against MCF-7 cells indicating the less anticancer activity.
V.Kayathri V.Kayathri, K.Kousalya K.Kousalya, A.Mafeena A.Mafeena, M.Monisha M.Monisha, S.Naga Nandhini S.Naga Nandhini,
Journal of Environmental Nanotechnology, Volume 10, pp 14-18; https://doi.org/10.13074/jent.2021.03.211432

Abstract:
This present work reports the synthesis ad characterization of Nickel oxide nanoparticles by chemical precipitation method from nickel chloride by using two different reducing agents, such as ammonia (NH3) and sodium hydroxide (NaOH). The prepared nanoparticles are characterized by X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Field Emission-Scanning Electron Microscopy (FE-SEM) and Energy Dispersive X-ray analysis (EDAX) techniques. XRD analysis showed that the prepared nanoparticles are crystalline in nature, and the average crystallite size for NiO nanoparticles with NaOH and NiO nanoparticles with NH3 is found to be 25.3 nm and 27.54 nm, respectively. FE-SEM analysis revealed that the prepared nanoparticles are spherical in shape with agglomeration. The presence of functional groups of the prepared nanoparticles is confirmed by using FT-IR analysis. The band at 450 cm-1 corresponds to the stretching vibration on Ni-OH, which confirms the presence of NiO, and the elemental analysis confirms the presence of nickel and oxygen elements in the prepared nickel oxide nanoparticles without any Impurities. The synthesized nickel oxide nanoparticles may be used in micro-supercapacitors, electrochromic coatings, and chemical sensing devices.
, P. Banumathi P. Banumathi, G. Tamil Selvan G. Tamil Selvan, P. Mosae Selvakumar P. Mosae Selvakumar
Journal of Environmental Nanotechnology, Volume 10, pp 01-05; https://doi.org/10.13074/jent.2021.06.212435

Abstract:
By incorporating Furfural-Antipyrine as coordinate sites into the fragment of receptor FBH-AP has been used as an artificial chemosensor for selective recognition of transition metals. The strong fluorescence emission at 388 nm of the receptor FBH-AP is effectively and selectively quenched by Al3+. A 1:1 complex is formed between the FBH-AP and Al3+ is determined by jobs plot and their common interferent ions do not show any interference with the Al3+. It is anticipated that the antipyrine could be a good candidate probe and has potential application for Al3+ determination.
V. Kalaiselvi V. Kalaiselvi, T. Loganayaki T. Loganayaki, M. Nathiya M. Nathiya
Journal of Environmental Nanotechnology, Volume 10, pp 30-36; https://doi.org/10.13074/jent.2021.03.211434

Abstract:
HAP is the main biomaterial used in the field of orthopedic applications. In the present qwork synthesis and characterization of pure and doped Hap, nanoparticles were performed. Biomaterials were selected for the present study in view of their bone replacement applications.The main proposition of this work is to synthesize the Hap nanoparticles by microwave-assisted co-precipitation method under room temperature. The prepared samples are characterized by using various techniques such as powder XRD, SEM, EDAX, UV-Visible, PL and FT-IR method. The antimicrobial analysis was performed to study the crystalline size, microstrain and dislocation density of the samples.SEM reveals the morphology of the samples. The composition of the samples was revealed by EDAX, UV, and PL reveal the optical property of the samples. Functional groups are determined by FTIR. Zone of inhibition for gram-positive and gram-negative bacteria was shown by antimicrobial analysis
S. Karthikeyan S. Karthikeyan, S. Gayathri S. Gayathri,
Journal of Environmental Nanotechnology, Volume 10, pp 01-07; https://doi.org/10.13074/jent.2021.03.211428

Abstract:
Multi-Walled Carbon Nanotubes (MWNTs) were synthesised from the methyl ester of Jatropha Curcas Oil and grown in Fe, Co, and Mo catalyst assisted on Alumina using the Spray Pyrolysis process at temperatures ranging from 550 to 750 °C in an N2 atmosphere. The effect of temperature on the yield and morphology of MWNTs synthesised from natural oil has revealed that 650 °C appears to be the most optimal temperature for producing high yields of well-graphitized MWNTs. By using resorcinol and formaldehyde as a binder with polyurethane as a sacrificial scaffold by evaporation induced self-assembly (EISA) approach and coal tar pitch based Meso Carbon Micro Beads (MCMB) as a binder by Extrusion– Spheronization process followed by Carbonization, MWNTs/Carbon Composite foam, and MWNTs/Carbon Composite pellets were prepared. Extrusion-Spheronization accompanied by Carbonization is used to make MWNTs/Carbon Composite using microcrystalline cellulose (MCC) as a binder. The micro and mesoporous composition of the MWNTs/Carbon composite foam had a high surface area of 551.21 m2/g, which was verified by N2 adsorption-desorption measurements and mesopore widths ranging from 2 to 50 nm. Micro and mesoporous structures with a high surface area and low density were achieved in MWNTs/Carbon Composite pellets. Pore structure was evident in the MWNTs/Carbon Composite.
P. Gowdhaman P. Gowdhaman, R. Sakthi Sudar Saravanan R. Sakthi Sudar Saravanan,
Journal of Environmental Nanotechnology, Volume 10, pp 19-24; https://doi.org/10.13074/jent.2021.03.211430

Abstract:
Pure and Pb doped cadmium sulfide (CdS) nanoparticles were synthesized using a straight forwarded solvothermal technique. The powder x-ray diffraction (PXRD) studies done on the sample synthesized revealed wrutzite phase of nanoparticles with improved crystalline properties due to the integration of dopant Pb into the host CdS. The UV-Vis characterization studies also reveal enhanced optical properties of the nanoparticles which can be efficiently tapped for various photovoltaic applications.
Back to Top Top