International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 04 Special Issue: 09 | Sep -2017
p-ISSN: 2395-0072
www.irjet.net
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
Green synthesis of MgO nanoparticles for antibacterial activity G. Palanisamy1 and T. Pazhanivel*2 1,2Smart
materials interface laboratory, Department of Physics, Periyar University, Salem, India. *Corresponding author E-mail: pazhanit@gmail.com -------------------------------------------------------------------------**------------------------------------------------------------------------and wet precipitation methods. MgO nanoparticles Abstract - Leaf extract based synthesis of metal oxide
produced from conventional methods are toxic and not used in medical application. In other hand green synthesized nanoparticles are very efficient and nontoxic [11]. The aim of this study was to compare MgO nanoparticles prepared by chemical and green synthetic routes for structural characterization, biological effects and photophysical properties was investigated.
nanoparticles facilitates the production of non-toxic nanoparticles due to the presence of various photochemical and biochemical compounds that are beneficial for sensor and pharmaceutical applications. The magnesium oxide nanoparticles were synthesized chemically and naturally (Leaf extraction). Without any stabilizing and reduced agent we have synthesized the MgO nanoparticles from betel leaf extract. The assynthesized samples were subjected to different analysis technique to know the materials physical and chemical properties. The asprepared samples were characterized by X-Ray Diffraction (XRD) to investigate the structure and size of crystal. Optical properties of the asprepared samples were investigated to UV-Visible spectroscopy analysis. Functional groups were confirmed by using FTIR analysis. Both the samples were subjected to carried out the antibacterial activity. Relatively, naturally synthesized nanoparticles shows better result as compare to other.
2. Experimental section 2.1. Chemicals and reagents Betel leaf were purchased from the local market in Salem, India. The magnesium precursors magnesium nitrate hexahydrate [Mg (NO3)2. 6H2O, 98%] and Sodium hydroxide [NaOH] were procured from Alfa Aesar. All reagents were used without further purification. Double distilled water was employed as the solvent.
Key Words: Leaf extract, Metal oxide, Precipitation method, antibacterial activity
2.2. Synthesis process
1. INTRODUCTION
Preparation of plant extracts: Fresh betel leaves
were separately added to deionized water in ratio (w/v) of 1:8. The mixtures were mixed using a magnetic stirrer for 30 min at 80°C. The extracts were allowed to cool down to room temperature before sequentially filtering through a mesh and Whatman No: 1 filter paper to remove solid particulates. The filtered extracts were stored in a refrigerator (5°C) for further use.
In the recent years, green chemistry methods for synthesis of metal oxide nanoparticles has become a major focus in current society [1]. Its more eco-friendly, low toxicity and exhibit long term stability. Generally green synthesis nanoparticles extract from fungi, bacteria, algae and green plants [2-5]. Plant leaf extracts have been extensively used for green synthesis. A wide range of bioactive phytochemicals as plants are widely available, safe to handle and possess a variety of metabolites that function as reducing agents in nanoparticle synthesis. It’s used various fields such as, sensor, biological and pharmaceutical applications [6]. Magnesium oxide (MgO) is an attractive and basic metal oxide material. It’s generally used as a catalyst [7], electrochemical biosensor [8], and pharmaceutical industry [9] and paints [10]. The highly crystalline MgO nanoparticles exhibit low electrical conductivity and higher thermal stability. Conventionally, MgO nanoparticles are synthesized by different methods such as, hydrothermal, solgel, chemical gas phase deposition © 2017, IRJET
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Preparation of green and chemical based MgO nanoparticles synthesis In the green synthesis of MgO nanoparticles, the betel leaf extracts were added to magnesium precursors and the mixtures were stirred. After 3 hours the reaction mixture solution was precipitate. After that, the precursor was collected and washed with double distilled water several times. The obtained materials dried in oven at 100°C for overnight. Finally, the precursor was annealed at 400 °C for 4 h to obtain the MgO nanoparticles. The chemically synthesis of MgO nanoparticles get 0.2 M of |
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