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D. Ragupathy,이수출,Salem S Al-Deyab,A. Rajendren 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.3
We report for the first time a rapid electrochemical synthesis of one-dimensional poly(2,5-dimethoxyaniline) nanorods (PDMA-NR) in the presence of surfactant. FE-SEM and TEM imagesconfirm the PDMA-NR formation and the average diameter of single rod sizes in the range of ~200–300 nm. An enzymatic glucose biosensor was fabricated through immobilizing glucose oxidase (GOx)into PDMA-NR matrix. The amperometric current response of PDMA-NR/GOx to glucose is linear in theconcentration range between 1 and 10 mM with a detection limit of 0.5 mM (S/N = 3). The PDMA-NR/GOxelectrode possesses high sensitivity (5.03 mA/mM), selectivity, stability, and reproducibility towardglucose.
Polyaniline-based nanocomposites for direct methanol fuel cells (DMFCs) - A Recent Review
Suba Lakshmi Madaswamy,Asma A. Alothman,Murefah mana AL-Anazy,Ahmad A. Ifseisi,Khadraa N. Alqahtani,Sendhil Kumar Natarajan,Subramania Angaiah,Dhanusuraman Ragupathy 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.97 No.-
This review delivers a summary of the recent advances in polyaniline based electrocatalyst for directmethanol fuel cell applications. Today’s world is urging for global energy due to the fossil fuel diminutionand ecological contamination which is overthrown by the direct methanol fuel cell. Amongst theconducting polymers, polyaniline has a significant role in the direct methanol fuel cell. Due to the highconductivity, unique redox properties, highflexibility, better solubility, reasonable stability, easesynthesis, and low cost. The nanocomposite of polyaniline with other electrochemically active materialssuch as metallic compounds and carbonaceous materials as well as nitrogen-doped carbon materialsderived from PANI based nanocomposite were in detailly discussed in this review.
Simple and rapid synthesis of polyaniline microrods and its electrical properties
D. Ragupathy,이수출,Salem S Al-Deyab,A. Rajendran 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.4
We report a facile and surfactant assisted synthesis of polyaniline microrods (PANI-MR) by ‘‘single-step chemical oxidative polymerization’’ method. The morphology of the PANI-MR was investigated by fieldemission scanning electron microscopy (FE-SEM). The average diameter of single PANI-MR was calculated to be 1.3 mm. The physiochemical characterization was examined using UV–visible spectroscopy, Fourier transform infrared spectroscopy and cyclic voltammetry. The electrical conducting property of the PANI-MR was analyzed using four-probe measurement method.
PERFORMANCE ANALYSIS OF COUNTER FLOW WET COOLING TOWER
R. RAMKUMAR,A. RAGUPATHY 대한설비공학회 2011 International Journal Of Air-Conditioning and Refr Vol.19 No.2
This paper presents an experimental work, which studies the performance of a counter-flow type cooling tower. The experimental trials have been carried out in a counter-flow type cooling tower test rig with mechanical draft. Expanded Wire Mesh type of film packing has been used for experimentation. The packing is made of mild steel with height ranging from 800 to 1255 mm. This study investigates the effect of the air and water flow on the cooling tower range, as well as the tower characteristics for different air flow and water flow quantities. The variation of temperature along the height of pack is measured by means of suitable thermocouples at five different places. The results show that the mass flow rate has adverse effect on the number of transfer unit. Also tower range would be increased by decreasing the inlet wet bulb air temperature.
Experimental Evaluation of Evaporative Cooler Using Agro Materials
R. RAMKUMAR,M. Kesavan,A. RAGUPATHY 대한설비공학회 2015 International Journal of Air-Conditioning and Refr Vol.23 No.4
The purpose of the study is to investigate the direct evaporate cooler in hot and humid regions with two different types of agro-based materials. In our experimental study, the locally available agro materials luffa (Sponge Gourd), zizanioides (Vetiver) were used with various thickness and the experimental results were compared with mathematical values. The operating parameters of pad thickness, air velocity, were changed and the performance of the cooler was analyzed. A test rig was designed and fabricated to collect experimental data. The performance of the evaporative cooler was evaluated based on the ambient condition. The analysis of the data indicated that cooling saturation efficiency improve with decrease of air velocity and higher pad thickness. It was shown that zizanioides-based pad with 160mm thickness has the higher performance (88%) at 4.5 m/s air velocity in comparison with luffa pad materials. The experimental results of outlet air temperature and number of transfer units (NTU) were compared with mathematical model. The test results were within the limit of 15% and 10% to mathematical values.