Murali K.R.,CSIR - Central Electrochemical Research Institute |
Kalaivanan A.,Arignar Anna College |
Sivaramamurthy K.,Rajapalayam Rajus College |
Perumal S.,Sthindu College
ECS Transactions | Year: 2012
Aluminium doped ZnO films were deposited by the sol gel dip coating method. The crystalline quality decreased with increase of Al doping. The band gap varies from 3.32 eV to 3.56 eV with increase of Al doping. This blue shift behavior or broadening in the band gap is mainly due to the Moss-Burstein band filling effect. The films exhibited 60-70% transmission in the visible region. The grain size and surface roughness varied from 45 nm to 15 nm and 3.5 nm to 1.3 nm respectively. The intensity of the Raman peaks at 331, 385, 438 and 582 cm-1 modes decreased with increasing the Al concentration. ©The Electrochemical Society.
Vijayan C.,Nmss Vellaichamynadar College |
Soundararajan N.,Madurai Kamaraj University |
Chandramohan R.,Sree Sevugan Annamalai College |
Dhanasekaran V.,Alagappa University |
And 3 more authors.
Journal of Microscopy | Year: 2011
Semiconducting silver selenide telluride (Ag2SeTe) thin films were prepared with different thicknesses onto glass substrates at room temperature using thermal evaporation technique. The structural properties were determined as a function of thickness by X-ray diffraction exhibiting no preferential orientation along any plane; however, the films are found to have peaks corresponding to mixed phase. The morphology of these films was studied using scanning electron microscope and atomic force microscopy respectively, and is reported. The morphological properties are found to be very sensitive to the thin film thickness. The composition of the films is also estimated using energy dispersive analysis using X-rays and are also reported. © 2011 The Authors. Journal of Microscopy © 2011 Royal Microscopical Society.
Meenakshisundaram M.,Center for Research and PostGraduate Studies in Chemistry |
Srinivasagan G.,Center for Research and PostGraduate Studies in Chemistry |
Srinivasagan G.,Rajapalayam Rajus College |
Kannan N.,Center for Research and PostGraduate Studies in Chemistry |
And 2 more authors.
Indian Journal of Environmental Protection | Year: 2013
The removal of Victoria Blue (VB) dye in aqueous solution on Ceiba pentandra shell carbon (CPSC) has been studied by batch adsorption technique. The effect of various experimental parameters has also been investigated. The extent of dye removal increased with decrease in the initial concentration, increased with increase in contact time, amount of adsorbent and the initial pH. Adsorption data have been analyzed using the Freundlich and Langmuir adsorption isotherms and first order kinetic equations, namely Natarajan-Khalaf, Lagergren and Bhattarcharya-Venkobacher equations. The kinetics of adsorption was found to be first order with respect to intra-particle diffusion as the rate determining step. These results indicate that CPSC is one of the best adsorbent that can be used in wastewater treatment for the removal of colours and dyes. © 2013 - Kalpana Corporation.
Perumal Raja S.,Rajapalayam Rajus College |
Karppusamy T.,Kongu Engineering College
Medziagotyra | Year: 2016
Nano CexMyO1-x+y (M = Zn, Mg and Ni) materials were prepared for the applications of spintronic devices by microwave induced combustion process using cerium nitrate, zinc nitrate, magnesium nitrate and nickel nitrate as a starting materials and sorbitol and glycine used as a fixed ratio of fuel. The structural properties of all samples were analyzed by XRD, SEM and TEM. The crystallite size was found in the nano ranges in the order of 27 nm to 3 nm and their lattice parameters are in the range of 5.3739A˚ to 5.4479A˚. These structural parameters are affected by amount of fuel ratio, nature of materials integrated and preparation method. The optical properties were examined via UV-Vis spectroscopy. The variation of the band gap energy was due to concentration of the grain boundaries, which depends on the type of mixing materials. The magnetic nature of the prepared samples was studied by Vibration Sample Magnetometer (VSM). The VSM results show the existence of weak ferromagnetic and paramagnetic nature of ceria nanocrystallite materials which is also depending on the incorporation of various materials. © Kauno Technologijos Universitetas. All rights reserved.
Sivaramamoorthy K.,Rajapalayam Rajus College |
Perumal S.,Sthindu College |
Kalaivanan A.,Arignar Anna |
Murali K.R.,CSIR - Central Electrochemical Research Institute
Proceedings of the International Conference on Nanoscience, Engineering and Technology, ICONSET 2011 | Year: 2011
CdO thin films have great technological interest due to their high-quality electrical and optical properties. Mixed oxides of CdO have been used in photovoltaic devices, gas sensors, phototransistors etc. In this work, the Acrylamide route was used to deposit CdO: In films. XRD patterns of the undoped and indium-doped CdO films exhibit cubic structure of the cadmium oxide with five characteristic peaks assignable to the (111), (200), (220), (311) and (222) planes. The intensity of the peaks decreases and the full-width at half-maximum (FWHM) increases as the indium content increases. The resistivity of the films decreases by two orders with Indium doping. It is observed that all the deposited films exhibited high transmission of about 70-90% in the visible range of 500-600 nm. The value for CdO film without doping is 2.41 eV, while the doping of 6 at wt% indium results in an increase of band gap to 2.97 eV. Surface morphology studies with Atomic force microscope indicated the formation of nanocrystallites with surface roughness around 0.3 nm. © 2011 IEEE.