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
Photo physical investigation on Mg / Sn doped ZnO nanoparticles for Gas sensing application K. Bhuvaneswari & T. Pazhanivel* Smart materials interface laboratory, Periyar University, Salem-11, Tamil Nadu, India. Corresponding author Email id: pazhanit@gmail.com ---------------------------------------------------------------------***--------------------------------------------------------------------toxic and hazardous gas thus essential for environmental safety purposes. Gas sensors play a significant role for the were successfully synthesized by microwave irradiation method. All the samples were systematically characterized detection and monitoring of poisonous hazardous gases by XRD, FTIR, UV, PL, EDAX and SEM measurements to study [3, 4]. In addition, combining two or more metal oxide the structural, chemical bonding, elemental composition, catalysts could improve or enhance sensing activity. Gas and optical analysis. From XRD analysis, as prepared sensor consist of two basic functions, such as receptor samples possess good crystallite nature. FTIR spectra of as functions and transducer functions. Receptor function prepared samples exhibit the strong absorption peaks aimed involving there step primarily the chemical substance, at metal oxygen region 500-900 cm-1. The morphology however transducer function changes the chemical signal analysis shows highly agglomerated spherical like particles into electrical signals. This segment deals through the for as prepared samples and good conductivity between structural properties supporting receptor functions of ZnO them. From optical analysis the Mg and Sn doped responsible for gas sensing performance. Wurtzite nanomaterials absorption maximum was red shifted with structure ZnO is the most favored for gas sensing (5). ZnO respected to ZnO nanoparticle. The emission properties of has been effectively prepared to detect various gases, such the doped material should studied from the as H2, NO2, O2, H2S, CH3CH2OH and NH3 [6]. Mg and Sn photoluminescence analysis. doped ZnO nanoparticles were prepared here through microwave irradiation method [7]. Key Words: Nanoparticles, Zinc Oxide, Doping, 1.1 Materials and Methods Microwave irradiation, Gas sensing…
Abstract - Mg & Sn doped zinc oxide (ZnO) nanoparticles
Chemicals
1. INTRODUCTION
Reagents used for experiments are Zinc nitrate [Zn (NO3)2], Tin chloride penta hydrate [Sn (Cl2). 5H2O], 3 2 Magnesium nitrate [Mg (NO ) ], Sodium Hydroxide (NaOH) and Ethanol [C 2H 6O]. All reagents were used without further purification. Double distilled water was employed as the solvent.
Zinc oxide nanoparticles have lot of applications in the fields of catalyst, sensing and pharmacological etc., Addition of doping constituents involves increasing the active sites, surface area, wide absorption of photon and reducing the band gap energies of the semiconductor. Because of doping the crystalline size and electron density variation in nanoparticles are the main factors to decide the efficiency of any photonic applications. More metal oxides having active catalysts than noble metals in the majority of applications, metal oxides are more suitable [1].
1.2 Preparation of zinc oxide Nanoparticles Recently, microwave-assisted synthesis methods have been widely used to produce oxide, hydroxide, sulfide nanoparticles and etc., in a typical procedure, 50ml aqueous solution of 0.95M Zn nitrate was mixed with 30ml aqueous solution of 0.05M tin chloride penta hydrate (or) magnesium nitrate. After stirring for several minutes, 2.5M of NaOH was slowly added to the reaction mixture. It was stirred for ten more minutes. Finally, the mixture was placed microwave irradiation (300 W) for 10 minutes. The product was filtered, washed with distilled water and dried in 80◦C for 12h in air at room temperature. The final product was annealing at 500°C for 1h and grinded the powder can be stored extended period of time.
Enormous growth of environmental effluence due to the fast population growth, industrialization, burning of fuels from automobiles, use of pesticides and insecticides in cultivated sector, leakages of poisonous chemical and gases is an alarming when risk to the surroundings [2]. The suspension of dangerous chemical from industrial effluent and excess water from agricultural lands into running as well as ground water could effect a number of health hazards. Initial discovery and monitoring of these
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