Raman spectroscopic study of nickel oxide nanoparticles and its antibacterial activity (original) (raw)
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Nickel oxide Nano-composite–Synthesis, Structural and Antimicrobial Study
2020
Nickel oxide (NiO) Nanocomposite was synthesized by sol-gel citrate method. As synthesized NiO was structurally characterized by X-Ray Diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). From XRD analysis, the NiO Nanocomposite had face-centered cubic (fcc) phase with crystallite size was found to be nearly 15 nm. Synthesis of NiO was confirmed by FT-IR. The antimicrobial activity was carried out against Escherichia coli (gram negative bacteria) and Staphylococcus aureus (gram positive bacteria). The NiO nanoparticles showed inhibitory activity in both strains of bacteria with best selectivity against gram-positive bacteria.
Synthesis of nickel oxide nanoparticles using different methods and study their bioactivity
Scientific Research Journal of Clinical and Medical Sciences, 2023
There is a growing interest in metal oxide nanoparticles with unanticipated features that are different from traditional materials to fulfill the demands of these applications. Nickel oxide (NiO) nanoparticles were created by sol-gel and co-precipitation methods. In this study, nickel oxide nanoparticles (NiO NPs) were prepared by co-precipitation using NiCl2 salt as a source of nickel nanoparticles and sodium hydroxide solution as a precipitating agent at room temperature and via sol-gel using citric acid (C6H8O7.H2O) and n-propanol (C3H7OH). The nickel hydroxide Ni(OH)2 precipitate was obtained, then it was calcinated at 500°C to obtain the nickel oxide nanoparticles (NiO NPs). The structural, morphological, and spectral properties were confirmed and investigated by using FE-SEM, TEM, and XRD, respectively. The antibacterial activity of the nickel oxide nanoparticles was investigated against several pathogenic bacteria, including E. coli and Staphylococcus aureus using the well diffusion method. The results showed good to excellent activity.
International Journal of Basic Science in Medicine, 2019
Introduction: Given the increasing rate of antibiotic resistance among bacterial strains, many researchers have been working to produce new and efficient and inexpensive antibacterial agents. It has been reported that some nanoparticles may be used as novel antimicrobial agents.Here, we evaluated antibacterial properties of nickel oxide (NiO) nanoparticles. Methods: NiO nanoparticles were synthesized using microwave method. In order to control the quality and morphology of nanoparticles, XRD (X-ray diffraction) and SEM (scanning electronmicroscope) were utilized. The antibacterial properties of the nanoparticles were assessed against eight common bacterial strains using agar well diffusion assay. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were measured. Antibiotic resistance pattern of the bacteria to nine antibiotics was obtained by Kirby-Bauer disk diffusion method. Results: The crystalline size and diameter (Dc) of NiO nanoparticles we...
The Nickel oxide Nanoparticles were synthesized from Nickel Nitrate Hexahydrate aqueous solution under the chemical method at 90°C. The average crystallite size was calculated from De-Bye Scherrer's equation. FESEM, EDX, XRD were used to characterize the structural features of the product. FTIR spectra confirmed the adsorption of the Nickel oxide nanoparticles. In addition, UV-visible absorption spectra were employed to estimate the band gap energy of the Nickel oxide nanoparticles. This method may be suitable for large scale production of Nickel oxide nanoparticles for practical applications. The effect of Nickel oxide nanoparticles is screened in vitro for antimicrobial activity by Disc diffusion method. The bacterial organisms used in this study are E.coli, Bascillus Subtilis and also fungi Aspergillus Niger. The observed inhibition zones for these nanoparticles are in the range of 8mm for E.coli and 7mm for Bascillus Subtilis and 7mm for fungi Aspergillus Niger. The cytotoxicity activities of Nickel oxide nanoparticles screened by MTT assay. We have screened for one type of cancer cell-line i.e MCF-7(Breast Cancer), Nickel oxide nanoparticles obtained IC 50 values in the range of 32.59ug/ml for MCF-7 cell line.
Journal of Science: Advanced Materials and Devices, 2020
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The numerous treatments for nano particles in the interdisciplinary field of biomedical self-discipline cannot be counted. Many researchers in biomedicine are intrigued by metallic-based nano particles. Several methods for synthesizing metal nano particles are under investigation, and green synthesis is considered a presumed choice due to its environmentally benign nature, safety from harmful chemicals, and economically favorable for synthesis. The target of the current research include the synthesis of nickel oxide nano particles (NiO NPs) through green route by using the extract prepared from the bark of Acacia Nilotica, and the analysis of its characteristics using XRD, SEM, EDAX, IR, UV-VIS, Photo luminescence spectra, microbial activity, mass loss scheme and electrochemical techniques. The diffraction analysis using X-ray (XRD) indicates the presence of NiO2 compound in the prepared nano particles. The Fourier transform Infrared spectroscopy (FTIR) confirmed the association of ...
The goal of this study was to synthesize nickel oxide nanoparticles (NiO-NPs) by the sol-gel method, which involved the use of Cassia Fistula is a herbal and medicinal plant. The Cassia Fistula (CF) plant extract acts as a stabilizing and capping agent. Further, NiO-NPs were characterized using UV-Visible spectroscopy (UV-Vis), Powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM) and Energy Dispersive X-Ray Spectroscopy (EDX). According to the results of UV-Visible, the absorption spectroscopy has displayed that the band gap is 3.5 eV. The biological properties were studied for prepared NiO-NPs. The antibacterial testes were examined using different bacterial strains such as Escherichia coli, Staphylococcus aureus and Staphylococcus Epidermis and dose-dependent inhibition response was reported. The tribological tests are carried out using four ball testers in accordance with ASTM D4172-18 requirements. NiO-NPs are utilised as lubricating additives in poly alpha olefin (PAO4) base oil. NiO-NPs in PAO4 at a concentration of 0.5 wt% improved the coefficient of friction, and positive results are observed.
Nickel nanoparticles (Ni NPs) with a crystalline size of around 30 nm have been synthesized successfully via the chemical reduction method. Ni NPs were obtained through a nickel salt with hydrazine hydrate at 80 °C temperature by using ethylenediamine as protective agent. The synthesized nanoparticles were characterized by using FTIR spectroscopy, powder X-ray diffraction pattern, ultraviolet-visible spectroscopy, energy dispersive X-ray spectroscopy (EDS), thermogravimetry (TG/DTG), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The size and morphology behavior of NPs were studied by PXRD, SEM and TEM techniques. Furthermore, its applications studies were carried out as catalyst for Knoevenagel condensation reaction of aromatic aldehydes and malononitrile under solvent free conditions. The efficacy of NPs catalyst was exhibited an excellent recyclability and reusability up to four times without any additional treatment. The silent feature of nickel nanoparticles were found as efficient, cleaner reactions profiles and simple workup. Moreover, its comparative antibacterial activities were performed by using common solvents and sonication under standard method. The antibacterial activities were tested against human bacterial pathogen such as Staphylococcus aureus, Escherichia coli, Klebsiella sp, Enterococcus faecalis and Pseudomonas aeruginosa using well diffusion method. Nonetheless, the antibacterial activities of Ni nanoparticles (20 to 60 ug) were compared with four well known antibiotics i.e. Amikacin (30 mcg), Ciprofloxacin (5 mcg), Gentamicin (5 mcg) and Norfloxacin (10 mcg). The highest antimicrobial activity of Nickel nanoparticles were found against Pseudomonas aeruginosa, Staphylococcus aureus (21 mm) and Klebsiella sp. (20 mm). However, the results reveal an efficient antimicrobial activity against pathogenic bacteria under sonication than common solvent technique.
Nickel oxide nanoparticles were synthesized by electrochemical reduction method using tetra butyl ammonium bromide (TBAB) and tetra octyl ammonium bromide (TOAB) as structure directing agents in an organic medium viz. tetra hydro furan (THF) and acetonitrile (ACN) in 1:4 ratio by optimizing current density 10mA/cm 2. The reduction process takes place over a period of 2 hrs. Such nanoparticles were prepared using simple electrolysis cell in which the sacrificial anode is commercially available nickel metal sheet and platinum (inert) sheet acts as a cathode. As the length of stabilizer increases the size of nanoparticles decreases. The parameters current density was also used to control the size of nanoparticles. The synthesized nickel oxide nanoparticles were characterized by FT-IR, UV, XRD, SEM– EDS and TEM. Antibacterial activity of synthesized nanoparticles reveal that the nickel nanoparticles showed good antibacterial activity.
Journal of Chemistry and Environment, 2023
This research focuses on the green synthesis of Nickel Oxide nanoparticles (NiO NPs) using Musa paradisiaca, commonly known as banana plant, as a cost-effective and eco-friendly approach. Musa paradisiaca, utilized in traditional medicine, possesses various medicinal properties, including antioxidant, antibiotic, allogeneic, and hypoglycemic antimicrobial attributes. The peduncle extract of Musa paradisiaca serves as a reducing and capping agent for NiO nanoparticle synthesis. Characterization techniques such as XRD, EDX, and UV-vis spectroscopy were employed to analyze the properties of the synthesized NiO nanoparticles. XRD analysis confirmed an average grain size of 15.26nm, while SEM images revealed round cubic-shaped nanoparticles with a highly crystalline structure. The antibacterial activity of NiO nanoparticles was investigated against bacterial strains, including Escherichia coli, Staphylococcus aureus, Bordetella bronchiectasis, and Bacillus subtilis, demonstrating effective antibacterial properties. Furthermore, the catalytic power of the synthesized nanoparticles was evaluated through the degradation of methyl blue and methyl orange dyes under sunlight and UV light. The results indicated superior degradation efficiency under sunlight compared to UV light for both dyes. Additionally, the study explored the adsorption activity of NiO nanoparticles for chromium (VI) at various concentrations, with the best adsorption percentage recorded at 17.23% under pH 4.