M. Mylarappa

DEVELOPMENT AND CHARACTERIZATION OF TITANIUM PHOSPHATES (TIP2O7) AND LITHIUM TITANIUM PHOSPHATE (LITIP2O7) AND THEIR THERMAL AND ELECTRIC PROPERTIES.

In this present study, the Titanium phosphates (TiP2O7) and Lithium titanium phosphate (LiTiP2O7) materials were synthesized by using soft hydrothermal method at moderate pressure and temperature conditions. The resultant materials were characterized by using P-XRD, SEM, EDAX, FTIR, TGA, DSC and Electrochemical impedance spectra (EIS). From P-XRD, confirms the well crystalline rhombohedral phase and was found to be in the range below 100 nm. FTIR spectra indicated that there is an increase in the degree of splitting and stretching of the vibration bands, whereas the splitting of vibration bands and polymerization of [PO4] decreased as the Ti ions. The TGA/DSC studies revealed that, these materials display endothermic reactions due to the liberation of ligands and diffusion. Thermal stability of the materials improved and the dielectric constant decreases. AC conductivity measurements for both the samples were carried and results are plotted. From AC conductivity studies, it is observed that the ionic conductivity of dc conductance of sample was measured show the frequency dependence dc capacitance of LiTiP2O7 material. The frequency response dc capacitance also depends on doping with titanium.

Comparative Study of Different Immobilization of Strontium inLiSr2(PO4)3 Crystal through Hydrothermal Process

The main objective of the present study was to synthesis the different immobilization of Sr+2 in LiSr2(PO4)3crystals using soft hydrothermal method at moderate pressure and temperature conditions.The powder X-ray diffraction confirms that, the synthesized LiSr2(PO4)3material has very good phase purity and crystalline with rhombohedralstructure.The energy-disperse X-ray (EDX) spectroscopic analysis shows their elemental composition correlating well with that of the strontium.Observation through a Scanning Electron Microscope (SEM) shows that microstructures of good quality and exhibited smooth surface, sub transparent and sub vitreous lustre. The FTIR studies was used to determine whether the bond structures were affected from the doping or not and revealed that the presence of O-H molecules and minute structural variations of synthesized materials.The TGA graph, temperature vs. weight % loss decreases with increasing the temperature showsLithium strontium phosphateas thermally stable so it is used as some optoelectronic device applications.The electrical conductivity of LiSr2(PO4)3was investigated as a function of the nature of the transition-metal cation. Impedancemeasurementshow that the materials have relatively good ionic conductance.

Synthesis and characterization of nano ZnO and MgO powder by low temperature solution combustion method: studies concerning electrochemical and photocatalytic behavior

Research Centre, Department of Science, EWIT, Bengaluru-560091, India Research and Development Centre, Bharathiar University, Coimbatore-641046, India Department of Chemistry, Dayananda Sagar College of Engineering, Bengaluru-78, India Dr. Premachandra Sagar Center for Advance Functional Materials, DSCE, Bengaluru-78, India Research Centre, Department of Chemistry, AMC Engineering College, Bengaluru-83, India Department of Studies and Research in Chemistry, B.H Road, Tumkur University Tumkur, Karnataka, India Department of Chemistry, Jyothi Institute of technology, Bengaluru-560062, India ∗nagaswarupa77@gmail.com

Preparation of chitosan/different organomodified clay polymer nanocomposites: studies on morphological, swelling, thermal stability and anti-bacterial properties

B. H. Nanjunda Reddy, V. Venkata Lakshmi∗,2, K. R. Vishnu Mahesh∗∗,3, M. Mylarappa, N. Raghavendra and T. Venkatesh Department of Chemistry, Amrita School of Engineering, Bengaluru, Campus, Amrita Vishwa Vidyapeetham University, Bangalore–560035, Karnataka, India Department of Studies and Research in Chemistry, B.H̃ Road, Tumkur University, Tumkur–572103, Karnataka, India Research center, Department of Chemistry, AMC Engineering College, Bengaluru–560083, India Department of Chemistry, Dayananda Sagar College of Engineering, Sahvige Malleshwara Hills, Kumara Swamy Layout, Bangalore–560083, Karnataka, India CMRTU, RV College of Engineering, Bengaluru–560059, Karnataka, India Department of Chemistry, ACS College of Engineering, Bengaluru–560074, Karnataka, India ∗laxmimurthy@rediffmail.com, ∗∗vishnumaheshkr@gmail.com

A facile hydrothermal recovery of nano sealed MnO2 particle from waste batteries: An advanced material for electrochemical and environmental applications

This work deliberates a method for manganese (Mn) recovery as manganese oxide obtained by leaching of waste batteries with 3M sulphuric acid. The Experimental test for the recovery of Mn present within the waste dry cell batteries were carried out by a reductive leachant. Elemental composition of leached sample was confirmed by Energy Dispersive X-ray analysis (EDAX), and Surface morphology of the recovered MnO2 was examined by using Scanning Electron microscopy (SEM). Phase composition was confirmed from X-ray Diffractro meter (XRD). The obtained leached solution was treated with 4M NaOH, yielded to Manganese Dioxide with high extraction degree, while it do not touches the Zn content within the solutions. The recovered samples were characterized using XRD, EDAX, SEM and Fourier transform infrared spectrometry (FTIR). The electrochemical properties of the as-recovered sample from leached solution was examined used cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Remarkably, the 80 wt.% MnO2 displays reversibility, diffusion constant, smaller equivalent series resistance and charge transfer resistance in 0.5M NaOH showed superior results as compared to alternative electrolytes. The ideal capacitive behaviour of MnO2 electrode and nano particle was applied to photocatalytic degradation of dyes.