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Dive into the research topics where S. Vasudevan is active.

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Featured researches published by S. Vasudevan.


RSC Advances | 2015

Adsorption of herbicide 2-(2,4-dichlorophenoxy)propanoic acid by electrochemically generated aluminum hydroxides: an alternative to chemical dosing

Ramakrishnan Kamaraj; Donald Jonas Davidson; Ganapathy Sozhan; S. Vasudevan

This research article presents an in situ electrosynthesis of aluminum hydroxides by anodic dissolution of sacrificial aluminum anode and their application towards the adsorption of herbicide 2-(2,4-dichlorophenoxy)propanoic acid (2,4-DP) from aqueous solution. Different sacrificial anode material like iron, magnesium, zinc and aluminum are tested and stainless steel is used as the cathode. The optimization of different experimental parameters like current density, pH, temperature and inter-electrode distance on the adsorption of 2,4-DP was carried out. The results showed that the maximum removal efficiency of 93.0% was achieved with aluminum as sacrificial anode at a current density of 0.10 A dm−2 and pH of 7.0. The adsorption of 2,4-DP preferably followed the Langmuir adsorption isotherm. The adsorption kinetic studies showed that the adsorption of 2,4-DP was best described using the second-order kinetic model. Thermodynamic parameters indicates that the adsorption of 2,4-DP on aluminum hydroxides was feasible, spontaneous and endothermic.


Catalysis Science & Technology | 2015

Eco-friendly and facilely prepared silica modified amorphous titania (TiO2–SiO2) electrocatalyst for the O2 and H2 evolution reactions

R. Venkatkarthick; Donald Jonas Davidson; Subbiah Ravichandran; Singaram Vengatesan; Ganapathy Sozhan; S. Vasudevan

An eco-friendly silica modified amorphous titania (TiO2–SiO2) electrocatalyst is prepared. This silica modified amorphous titania (TiO2–SiO2) composite material is prepared by facile spurting of silica (obtained from a sustainable resource) over a titanium plate and identified as an active electrocatalyst for O2 and H2 evolution by water oxidation. The prepared composite shows a maximum current density of 12 mA cm−2 at 2 V (versus RHE) in 1 M KOH electrolyte. This is because the semiconductor heterostructure of the structurally and chemically dissimilar amorphous TiO2–SiO2 composite introduces new collective electronic states with improved electrical conductivity, with a decrease in the work function. The catalytic activity is found to be stable in continuous operation for about 10 h. The physicochemical characterization of the electrocatalyst was carried out using scanning electron microscopy, energy dispersive X-rays, X-ray diffraction, X-ray photoelectron spectra, and electron paramagnetic resonance and the work function was examined by a Scanning Kelvin Probe. Because of the simple, cheap, and scalable preparation procedure, the electrocatalyst is highly promising for practical low cost and high technology applications. Interestingly, the system is active in the oxygen and hydrogen evolution reactions, leading to a promising bifunctional electrocatalyst.


Meeting Abstracts | 2011

Sulfonated Polystyrene-Block-(Ethylene-Ran-Butylene)-Block-Polystyrene (SPSEBS) Membrane for Sea Water Electrolysis to Generate Hydrogen

Subbiah Ravichandran; Rengarajan Balaji; Balasingam Suresh Kannan; Swaminathan Elamathi; Dharmalingam Sangeetha; Jothinathan Lakshmi; S. Vasudevan; Ganapathy Sozhan

Sea water oxidation is one of the promising ways to produce hydrogen since it is available in plentiful supply on the earth. However, in sea water electrolysis poisonous chlorine evolution is the most favored reaction over oxygen evolution at the anode. In this work, study has been focused on the development of electrode materials with high selectivity for oxygen evolution reaction over chlorine evolution. We employed perm selective membrane i.e. sulfonated polystyrene-block-(ethylene-ran-butylene)-block-polystyrene (SPSEBS) which electrostaticlly repels the chloride ion (Cl-) to the electrode surface and thereby enhances the oxygen evolution and reduces the chlorine evolution at the anode. The electrochemical behavior of both modified and bare IrO2 electrodes were characterized using polarization studies and the gas evolution efficiencies are calculated based on bulk electrolysis method. The surface morphology of the electrode was analyzed before and after electrolysis using scanning electron microscope (SEM). The results suggest that the nearly 95% oxygen evolution efficiency could be achieved when the surface of IrO2/Ti electrode was modified with perm selective membrane.


Journal of Electroanalytical Chemistry | 2013

Studies on polymer modified metal oxide anode for oxygen evolution reaction in saline water

R. Venkatkarthick; Swaminathan Elamathi; Dharmalingam Sangeetha; Rengarajan Balaji; B. Suresh Kannan; S. Vasudevan; D. Jonas Davidson; Ganapathy Sozhan; Subbiah Ravichandran


Energy | 2014

Platinum deposition on the nafion membrane by impregnation reduction using nonionic surfactant for water electrolysis – An alternate approach

Subbiah Ravichandran; R. Venkatkarthick; A. Sankari; S. Vasudevan; D. Jonas Davidson; Ganapathy Sozhan


Materials Chemistry and Physics | 2017

α-Fe2O3/TiO2 heterostructured photoanode on titanium substrate for photoelectrochemical water electrolysis

R. Venkatkarthick; D. Jonas Davidson; Subbiah Ravichandran; S. Vasudevan; Ganapathy Sozhan


224th ECS Meeting (October 27 – November 1, 2013) | 2013

Titania Based Mixed Oxide Photoanode for Photoelectrochemical Water Oxidation

R. Venkatkarthick; D Jonas Davidson; S. Vasudevan; Ganapathy Sozhan; Subbiah Ravichandran


Archive | 2012

HydrogenMembrane for Sea Water Electrolysis to Generate Polystyrene-Block-(Ethylene-Ran-Butylene)-Block-Polystyrene Sulfonated

Ganapathy Sozhan; Dharmalingam Sangeetha; S. Vasudevan; Subbiah Ravichandran; Rengarajan Balaji; Balasingam Suresh Kannan


Meeting Abstracts | 2012

Photoelectrochemical Generation of Hydrogen Using p-type CaFe2O4 Photocathodes

R. Venkatkarthick; C Krithiga Devi; L John Berchmans; S. Vasudevan; D Jonas Davidson; Ganapathy Sozhan; Subbiah Ravichandran


Meeting Abstracts | 2011

Sulfonated polystyrene-block-(ethylene-ran-butylene)- block-polystyrene (SPSEBS)/SiO2 composite membrane for water electrolysis to generate hydrogen

Shahitha Parveen J; Swaminathan Elamathi; Dharmalingam Sangeetha; Jothinathan Lakshmi; Adhimoolam Sankari; S. Vasudevan; Donald Jonas Davidson; Ganapathy Sozhan; Subbiah Ravichandran

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Ganapathy Sozhan

Council of Scientific and Industrial Research

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Subbiah Ravichandran

Council of Scientific and Industrial Research

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R. Venkatkarthick

Council of Scientific and Industrial Research

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Rengarajan Balaji

Council of Scientific and Industrial Research

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D. Jonas Davidson

Council of Scientific and Industrial Research

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Donald Jonas Davidson

Council of Scientific and Industrial Research

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Jothinathan Lakshmi

Council of Scientific and Industrial Research

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Balasingam Suresh Kannan

Council of Scientific and Industrial Research

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