Dr. Ramachandran T. currently serves as Professor in Chemistry and Chairperson, Department of Sciences, School of Engineering, Coimbatore Campus. His areas of research include Industrial Electrochemistry, Batteries and Fuel Cells.






Publication Type: Journal Article
Year of Publication Publication Type Title
2016 Journal Article K. Dhara, Ramachandran, Ta, Bipin G. Nair Dr., and T. G. Satheesh Babu, “Au nanoparticles decorated reduced graphene oxide for the fabrication of disposable nonenzymatic hydrogen peroxide sensor”, Journal of Electroanalytical Chemistry, vol. 764, pp. 64-70, 2016.[Abstract]

A simple approach is followed for the fabrication of disposable nonenzymatic hydrogen peroxide (H2O2) sensor using gold nanoparticles decorated reduced graphene oxide (Au/rGO) nanocomposite. Au/rGO nanocomposite was prepared by one pot reduction of graphene oxide and Au(III) ions. The composite was characterized using various spectroscopic and microscopic techniques. The Au/rGO nanocomposite suspension was cast on the indigenously fabricated screen printed electrode (SPE). Voltammetric studies on the modified electrode showed that the Au/rGO nanocomposite modified SPE have enhanced catalytic activity towards H2O2. The sensor exhibited linear relationship in the range from 20 μM to 10 mM with a sensitivity of 1238 μA mM- 1 cm- 2 and a limit of detection 0.1 μM. The sensor also showed excellent selectivity in presence of other electroactive species such as ascorbic acid, dopamine, glucose and uric acid. © 2016 Elsevier B.V. All rights reserved.

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2016 Journal Article N. Durgadevi, Sunitha, M., Sathish, A., Guhan, S., and Ramachandran, Ta, “Electro Oxidation of Methanol on Ni/Ni-Co Coated SS Mesh Electrode”, Indian Journal of Science and Technology, vol. 9, 2016.[Abstract]

In this work, the oxidation of methanol was carried out using Ni and Ni-Co alloy electrodeposited on stainless steel mesh substrate with a view to replace expensive and sensitive platinum and platinum alloy catalysts. The performance of electrode was assessed through cyclic voltammetry in alkaline media. The operating conditions of the electrode were optimized.

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2016 Journal Article Ka Nithya, Sathish, A., Kumar, PcSenthil, and Ramachandran, Ta, “Biosorption of hexavalent chromium from aqueous solution using raw and acid-treated biosorbent prepared from Lantana camara fruit”, Desalination and Water Treatment, pp. 1-17, 2016.[Abstract]

The aim of the present investigation was to explore the performance of the acid-treated Lantana camara fruit biosorbent in binding hexavalent chromium from aqueous solutions. FTIR studies revealed the contribution of carbohydrates, glycosides, and flavonoids in the biosorbent. EDS analysis exhibited the occurrence of chromium ions after biosorption, whereas SEM image exposed the enhancement of porosity after acid treatment. The isotherm models such as Langmuir, Freundlich, Dubinin–Radushkevich, and Temkin models were studied to depict the mechanism of interaction of the biosorbent with the adsorbate. Besides isotherm models, kinetic studies like pseudo-first-order, pseudo-second-order, and intraparticle diffusion models were also performed to validate the controlling mechanism of biosorption. Langmuir model showed a better fit favoring monolayer adsorption and a high correlation value from the pseudo-second-order model suggests chemisorption. To understand whether the biosorption process releases or absorbs energy, thermodynamic analysis was carried out. The outcome of the findings showed endothermic nature of the process with increased randomness at the solid solution interface. Regeneration studies showed better results with 0.2 M NaOH solutions. The obtained maximum uptake capacity of 83 mg/g with a minimal biomass dosage proves the credible potential of the selected biosorbent in removing toxic hexavalent chromium. © 2016 Balaban Desalination Publications. All rights reserved.

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2015 Journal Article Ka Dhara, Ramachandran, Ta, Bipin G. Nair Dr., and T. G. Satheesh Babu, “Single step synthesis of Au-CuO nanoparticles decorated reduced graphene oxide for high performance disposable nonenzymatic glucose sensor”, Journal of Electroanalytical Chemistry, vol. 743, pp. 1-9, 2015.[Abstract]

A nonenzymatic electrochemical glucose sensor was fabricated using gold-copper oxide nanoparticles decorated reduced graphene oxide (Au-CuO/rGO). A novel one step chemical process was employed for the synthesis of nanocomposite. Morphology and crystal planes of the nanocomposite were characterized using high resolution scanning electron microscopy (HRSEM) and X-ray diffraction (XRD) respectively. The Au-CuO/rGO nanocomposite was dispersed in N,N-dimethyl formamide (DMF) and drop-casted on the working area of the indigenously fabricated screen printed electrode (SPE). The sensor showed good electrocatalytic activity in alkaline medium for the direct electrooxidation of glucose with linear detection range of 1 μM to 12 mM and a lower detection limit of 0.1 μM. The sensor exhibited an excellent sensitivity 2356 μA mM- 1 cm- 2. Sensor was used for the determination of serum glucose concentration and the results obtained were compared with commercially available test strips. © 2015 Elsevier B.V. All rights reserved.

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2015 Journal Article P. V. Suneesh, Sara, V. Vidhu, Ramachandran, Ta, Bipin G. Nair Dr., and T. G. Satheesh Babu, “Co-Cu alloy nanoparticles decorated TiO2 nanotube arrays for highly sensitive and selective nonenzymatic sensing of glucose”, Sensors and Actuators, B: Chemical, vol. 215, pp. 337-344, 2015.[Abstract]

A nonenzymatic glucose sensor was fabricated by electrodepositing cobalt rich cobalt-copper alloy nanoparticles (Co-CuNPs) on vertically aligned TiO2 nanotube (TDNT) arrays. For this, TDNT arrays with tube diameter of 60 nm were synthesized by electrochemical anodization. The composition of the electrodeposited alloy was optimized based on the electrocatalytic activity towards glucose oxidation. This is achieved by controlling the concentration of electrolyte and time of deposition. Chemical composition of the optimized Co-Cu alloy nanoparticles is determined to be Cu0.15Co2.84O4 with fcc crystalline structure. The sensor showed two linear range of detection with high sensitivity of 4651.0 μA mM-1 cm-2 up to 5 mM and 2581.70 μA mM-1 cm-2 from 5 mM to 12 mM with a lower detection limit of 0.6 μM (S/N = 3). The sensor is highly selective to glucose in the presence of various exogeneous and endogeneous interfering species and other sugars. The response of the sensor towards blood serum was in good agreement with that of commercially available glucose sensors. © 2015 Elsevier B.V.

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2015 Journal Article K. Dhara, Ramachandran, Ta, Bipin G. Nair Dr., and T. G. Satheesh Babu, “Highly sensitive and wide-range nonenzymatic disposable glucose sensor based on a screen printed carbon electrode modified with reduced graphene oxide and Pd-CuO nanoparticles”, Microchimica Acta, 2015.[Abstract]

A nanocomposite consisting of reduced graphene oxide decorated with palladium-copper oxide nanoparticles (Pd-CuO/rGO) was synthesized by single-step chemical reduction. The morphology and crystal structure of the nanocomposite were characterized by field-emission scanning electron microscopy, high resolution transmission electron microscopy and X-ray diffraction analysis. A 3-electrode system was fabricated by screen printing technology and the Pd-CuO/rGO nanocomposite was dropcast on the carbon working electrode. The catalytic activity towards glucose in 0.2 M NaOH solutions was analyzed by linear sweep voltammetry and amperometry. The steady state current obtained at a constant potential of +0.6 V (vs. Ag/AgCl) showed the modified electrode to possess a wide analytical range (6 μM to 22 mM), a rather low limit of detection (30 nM), excellent sensitivity (3355 μA∙mM−1∙cm−2) and good selectivity over commonly interfering species and other sugars including fructose, sucrose and lactose. The sensor was successfully employed to the determination of glucose in blood serum. [Figure not available: see fulltext.] © 2015 Springer-Verlag Wien

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