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Silambarasan P.,Sudan University of Science and Technology | Vairavel M.,Bhabha Atomic Research Center | Kumar G.R.,Arni University | Raj S.G.,Sudan University of Science and Technology
Materials Today: Proceedings | Year: 2015

Single phase bismuth ferrite (BFO) was synthesized by sol gel auto combustion method using various fuels such as Citric acid, Urea, DL Malic acid, L(+) Tartaric acid, EDTA and Ethylene glycol. Phase formation was confirmed using XRD analysis and effect of fuels on phase formation is discussed in detail. Simultaneous Thermo gravimetric-differential thermal analysis (TG-DTA) was carried out to investigate its phase evolution. Phase formation on the single step of nanocrystalline form of bismuth ferrite was obtained for the first time. The results were discussed in detail. © 2015 Elsevier Ltd.

Gokul Raj S.,Vel Tech Dr.RR & Dr.SR Technical University | Ramesh Kumar G.,Arni University
Advanced Materials Letters | Year: 2011

Single crystals of pure and Deuterated L-alanine have been grown by both slow cooling and seed rotation techniques. The grown nonlinear optical crystals were subjected to single crystal X-ray diffraction for determining its lattice parameters and morphology. Thermal expansion measurements were carried for the Deuterated crystals of L-alanine using thermomechanical analyzer in order to ascertain the strain tensors along the three mutually perpendicular crystallographic directions. Microhardness study was also undergone on deuterated L-alanine single crystals on a prominent plane for determining the mechanical strength of the grown crystals. The results have been discussed in detail. © 2011 VBRI press.

Boopathi G.,Presidency College at Chennai | Gokul Raj S.,Technology University | Ramesh Kumar G.,Arni University | Mohan R.,Presidency College at Chennai
Materials Today: Proceedings | Year: 2015

Hexagonal phase Gd1-xSmx(OH)3 nanorods were successfully synthesized through precipitation technique. Cubic phase Gd2-xSmxO3 nanorods were obtained by dehydration of the corresponding Gd1-xSmx(OH)3 nanorods. The dopant percentage was optimized and maintained at 5 at.%. The hydroxide and oxide nanophosphors were systematically characterized by using powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy with energy dispersive X-ray (SEM/EDX), transmission electron microscopy (TEM) and photoluminescence (PL) spectrometry. The obtained results were discussed in detail. © 2015 Elsevier Ltd.

Sivakumar P.,Anna University | Bhagiyalakshmi M.,Arni University | Anbarasu K.,Tamil Nadu Co Operative Milk Producers Federation Ltd
Fuel | Year: 2012

An anaerobic process for the treatment of spoiled milk from the milk processing industry was investigated. It was carried out in a laboratory scale batch reactor and using the obtained data, it was scaled up to a pilot Anaerobic Sequential Batch Reactor (ASBR). The processes include acclimatization of seed consortia and start up of the reactor under room condition. The batch reactor was studied at different pH, inoculum dosage, and Chemical Oxygen Demand (COD) loading. The scaled up pilot plant is of 100 L capacity and it was observed continuously for 30 days. At steady state, the efficiency of the pilot plant in removing COD was found to be 92.80%, and it was able to produce biogas volume of 0.311 m 3 for 1 kg COD degradation. The results obtained showed that biogas contained a maximum of 69.18% of methane. © 2012 Elsevier Ltd. All rights reserved.

Rana S.B.,Guru Nanak Dev University | Singh R.P.P.,Arni University
Journal of Materials Science: Materials in Electronics | Year: 2016

In this study, pure ZnO and Ni doped ZnO nanoparticles were successfully synthesized by using the wet chemical precipitation method. Pure and Ni doped ZnO nanoparticles samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy (EDS), UV–visible (UV–Vis) and FTIR spectroscopy. The XRD investigation of pure and Ni-doped ZnO nanoparticles samples reveal and confirm the formation of single phase hexagonal wurtzite structure, without formation of any secondary and other impurity phases. XRD results further reveals the shifting of characteristics peak toward higher 2θ (theta) angle with Ni doping. This shifting of the XRD peaks toward higher angle clearly indicates that Ni ions are effectively incorporated in the ZnO lattice. Surface morphology of pure and Ni doped ZnO nanoparticles samples was performed by using the SEM confirms the formation of spherical nanocrystallites with fine and clear defined boundaries. EDS spectroscopy indicates the substitution of dopant Ni2+ effectively in lattice site of Zn2+ as evident from XRD result also. The carriers i.e. donors confined on the Ni sites were confirmed from the micro Raman spectroscopy. Optical property of Ni-doped samples is confirmed by using the UV–Vis absorption which showed blue shift in absorption edge as compared to undoped ZnO nanoparticles. Undoped and Ni-doped ZnO nanoparticles exhibit considerable changes in the M–H loop, specifically the diamagnetic response changed into ferromagnetic character for Ni doped samples in VSM investigation. The antibacterial activities of the Nickel doped zinc oxide were studied against Gram-negative (Shigella dysenteriae, Vibrio cholerae, and E. coli) via using agar well diffusion technique. Further, these Ni doped nanoparticles were then applied as antibacterial agent to control the microorganisms or bacterial growth. Ni-doping on zinc oxide and exposure of sunlight enhanced the antibacterial activity against bacterial pathogens which isolate at 40–45 μg concentration. Interestingly in this study, most effective antibacterial results were obtained against the water related bacteria such as E. coli and V. cholerae for Ni-doped ZnO NPs. © 2016 Springer Science+Business Media New York

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