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Govindaraj Divyapriya,Keshav V. kumar,Lohita Rajesh,Indumathi M. Nambi 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.89 No.-
The study was performed to understand the feasibility of graphite felt for electro-enhanced removal ofperchlorate ions through capacitive deionization process (CDI) in aqueous solution. The cyclicvoltammetry studies indicated that the perchlorate ions neither get oxidized nor reduced under theoperating conditions for the applied potential range of 1.5 V. The effect of voltage,flow rate, perchlorateconcentration, pH of the solution and temperature on the electrosorption was studied. Theelectrosorption capacity increased with increasing applied potential,flow rate and perchlorateconcentration. The change in pH significantly affected the removal efficiency due to competitive ioniceffect. The increase in temperature had a negative impact on the electrosorption capacity. Langmuirmodel was found to be a betterfit than the Freundlich model and the maximum electrosorption capacitywas found to be 21.1 mg g 1. It was observed that electro-enhanced adsorption followed pseudofirstorder kinetic model with a rate constant of 0.45 min 1 for an initial concentration of 1000 mg L 1operated at 1.5 V. Moreover the graphite felt exhibited good repeatability of the electrosorption processand affinity toward perchlorate ions. Thus it can be concluded that the graphite felt electrode can bepotentially used for electrosorptive removal of perchlorate ions from the aqueous solution.
Soft semi-pre-Baire spaces on fuzzy soft topological spaces
E. Poongothai,S. Divyapriya 원광대학교 기초자연과학연구소 2021 ANNALS OF FUZZY MATHEMATICS AND INFORMATICS Vol.21 No.2
The main aim of this paper is to initiate and explore the properties of fuzzy soft semi-pre-Baire spaces. We introduce and investigate fuzzy soft semi-pre-nowhere dense set, fuzzy soft semi-pre first category set, fuzzy soft semi-pre-second category set in fuzzy soft topological spaces.
Sankar Ganesh, R.,Sharma, S.K.,Sankar, S.,Divyapriya, B.,Durgadevi, E.,Raji, P.,Ponnusamy, S.,Muthamizhchelvan, C.,Hayakawa, Y.,Kim, D.Y. ELSEVIER 2017 Current Applied Physics Vol.17 No.3
<P>Nanocrystalline BiFeO3 (BFO) powder was synthesized by sol-gel method and subsequent annealed at 100-500 degrees C. The microstructural analysis of BFO nanopowder confirmed the perovskite like structure of spherical nanoparticles annealed at 500 degrees C. The Raman spectrum of BFO nanoparticles showed the rhombohedrally structure with the space group of R3c. The XPS spectrum of BFO nanopowder showed the peaks of Bi, Fe, and O at the binding energy of 158.8, 711.75 and 529.2 eV, respectively. The piezoelectric properties of BFO nanoparticles were evaluated by making the sandwiched structure of graphene/BiFeO3-PDMS/graphene. The fabricated piezoelectric device demonstrated an output voltage of 0.4 V by applying the normal pressure from human finger on the device. (C) 2016 Elsevier B.V. All rights reserved.</P>
R. Sankar Ganesh,Sanjeev K. Sharma,S. Sankar,B. Divyapriya,E. Durgadevi,P. Raji,S. Ponnusamy,C. Muthamizhchelvan,Y. Hayakawa,김득영 한국물리학회 2017 Current Applied Physics Vol.17 No.3
Nanocrystalline BiFeO3 (BFO) powder was synthesized by sol-gel method and subsequent annealed at 100e500 C. The microstructural analysis of BFO nanopowder confirmed the perovskite like structure of spherical nanoparticles annealed at 500 C. The Raman spectrum of BFO nanoparticles showed the rhombohedrally structure with the space group of R3c. The XPS spectrum of BFO nanopowder showed the peaks of Bi, Fe, and O at the binding energy of 158.8, 711.75 and 529.2 eV, respectively. The piezoelectric properties of BFO nanoparticles were evaluated by making the sandwiched structure of graphene/ BiFeO3-PDMS/graphene. The fabricated piezoelectric device demonstrated an output voltage of 0.4 V by applying the normal pressure from human finger on the device.