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
Optical Studies of Ni and Fe doped Tin Oxide Nanoparticles by Coprecipitation Method Amutha.T1, P. Lavanya1, M.Rameshbabu2 and K.Prabha1* 1 Department
of Physics, Mother Teresa Women’s University, Kodaikanal. Tamilnadu, India of Physics, Arulmigu Palaniandavar College of Arts and Culture, Palani, Tamilnadu, India ---------------------------------------------------------------------***--------------------------------------------------------------------2. EXPERIMENTAL ANALYSIS Abstract – Pure, Ni and Fe doped Tin Oxide (SnO2) 2Department
nanoparticles were synthesized by simple co-precipitation method. The structural, chemical and optical properties of the samples were analyzed using X-ray diffraction (XRD), UV–visible spectroscopy, FT-IR and Photo Luminescence Studies. SnO2 crystallites were found to exhibit Tetragonal Rutile structure. Ni and Fe doped SnO2 nanoparticles revealed that the metal ions substituted in the Sn lattice. A significant red shift in the UV absorbing band edge was observed with the doped Ni and Fe contents. The FT-IR analyses confirmed the incorporation of Ni and Fe in the synthesized powder.
2.1 Synthesis For the preparation of pure, Ni and Fe doped SnO2 nanoparticles, co-precipitation method have been adopted. The following analar grade precursors, 1.5 mM of NiCl2.6H2O, 1.5 mM of FeCl2.6H2O and 1.5 M of SnCl2.2H2O were taken to release Ni, Fe and Sn respectively. The aqueous solutions were taken in atomic weight percentage ratio to prepare doped SnO2 nanoparticles. De‐ionized water was taken as solvent for the preparation electrolyte. The solution was stirred for 2 hours using hot plate with a magnetic stirrer. Then, ammonium hydroxide (NH4OH) was added into the solution (drop by drop), with stirring, until pH 9 was reached. The each doped solutions were then kept at room temperature for one day to complete the aging process. The resultant solution was washed several times with ethanol and double distilled water and dried in oven keeping the temperature at 100○C for 6 hrs. These precursors were ground in an agate mortar and pestle for 30 minutes to obtain fine powder. These powders were placed in an alumina crucible at sintering temperature as 500 °C for 2 hrs in a furnace and brought the furnace to room temperature at the rate of 50°C per hour to get the annealed powder sample of pure and doped SnO2.
Key Words: Tin Oxide, XRD, UV-Vis Absorption, FT-IR, PL Studies
1. INTRODUCTION Among the various important categories of the functional materials like, polymers, magnetic, dielectric and semiconductors, the ferromagnetic semiconductors are emerged as attracting materials and driven a considerable attention in the recent years [1-2]. Tin oxide (SnO2) is one of the most intriguing materials to be investigated today. This is because SnO2 is a well-known n-type semiconductor with a wide band gap of 3.6-3.8 eV [3-5], and for its potential application in transparent conductive electrode for solar cells, a gas sensing material for gas sensors, transparent conducting oxide electrodes, photochemical and photoconductive devices in liquid crystal display, gas discharge display, lithium-ion batteries, etc.,[6-10]. Co-precipitation [11] is a suitable chemical method in a nanoparticles synthesis because it does not require high pressure and temperature, impure materials are eliminated by filtration and repeated washing and cost effective method. In the present study, SnO2 nanoparticles were synthesized by co-precipitation method and ultrasonic wave agitation was used to homogenize nanoparticles size.
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