International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 04 Special Issue: 09 | Sep -2017
p-ISSN: 2395-0072
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One Day International Seminar on Materials Science & Technology (ISMST 2017) 4th August 2017 Organized by
Department of Physics, Mother Teresa Women’s University, Kodaikanal, Tamilnadu, India
Rapid solution combustion synthesis of NiO Nanostructures: Characterization and Evaluation of antibacterial activity R. Jamuna, A.Jegatha Christy * PG & Research Centre of Physics, Jayaraj Annapackiam College for Women (Autonomous), Periyakulam-625 601, and Theni district, Tamilnadu. E-mail id: jegathachristy @gmail.com --------------------------------------------------------------------------***----------------------------------------------------------------------------
Abstract: Nickel oxide (NiO) NPs were synthesized by solution combustion method using Nickel nitrate as an oxidizer and
starch as fuel. The X-Ray Diffraction (XRD) exhibit cubic structure and confirmed the presences of NiO NPs (JCPDS: 65-2901). The morphology of the NiO nanoparticles was investigated by means of SEM and confirms the nanostructure. It is possible to suggest that the organic fuel starch is responsible for the formation of nanostructure due to the easier complex formation. The chemical composition of NiO NPs was investigated by Energy Dispersive Spectroscopy (EDAX). It confirms the presence of Nickel oxide nanoparticles. In the FTIR analysis, Ni-O stretching vibration mode is obtained in the region of 454.02 cm−1. The prepared NiO NPs are very effective to gram positive strains than the gram negative strains. Gram positive and gram negative bacteria have differences in their membrane structure, the most distinctive of which is the thickness of the peptidoglycan layer. Key words: Nickel oxide NPs, Solution Combustion method, XRD, SEM & EDAX, UV, FT-IR, Antibacterial activity.
1. INTRODUCTION Nickel oxide (NiO) is a significant transition metal oxide that has garnered attention as a strong candidate for many fields including super paramagnetic devices, photovoltaic devices, electrochemical super capacitors, magnetic materials, catalysis, smart windows, fuel cell, and photovoltaic devices [1]. These nanostructured particles are regarded as a ptype semiconductor having large exciton binding energy with stable wide band gap (3.6–4.0 eV). Bulk NiO is an antiferromagnetic insulator with a Neel temperature of 523K [2]. They exhibit many unique magnetic, optical, electronic, and chemical properties that are significantly different than those of bulk-sized NiO particles due to their quantum size and surface effects [3]. Some of these techniques suffer from the difficulty in size homogeneity and dispersion of NiO nanoparticles (NPs). Generally, most techniques aim to reduce the costs of chemical synthesis and to produce materials for technological applications [4]. These materials like copper, zinc, nickel, silver present high antibacterial activity, low toxicity, chemical stability, long lasting action period and thermal resistance compared to organic antibacterial agents [5]. In the present study, NiO nanostructures were synthesized by solution combustion method using starch as fuel. The antibacterial activities of the prepared NiO nanostructure were investigated.
2. MATERIALS AND METHODS 2.1 Synthesis of NiO NPs For the preparation of NiO NPs, nickel nitrate, starch was taken as starting materials. The stoichiometric composition of solution components fuel and oxidizer was calculated according to the principle of chemistry keeping the oxidizer (metal nitrate) to fuel (starch) ratio unity. Stoichiometric amount of Nickel (II) nitrate and starch were dissolved in de-ionized water separately. The solution was mixed vigorously until the homogenous solution was obtained and then the solution was kept the furnace at 3000C. The solution boils and undergoes dehydration, then the solution reaches the point of combustion, it began to burn released a lot of heat as fumes and vaporizing all the solution. As a result, NiO product and gases of H2O, N2 can be formed directly from the reaction between fuel and oxidizer without necessary of getting oxygen from outside. The process was completed in 20 minutes and fine black colour powder was obtained as a result.
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