Papers by Sambandam Anandan
Electrocatalysis, 2017
Controlled size of nanoparticles and rational tuning of the composition could precisely and effec... more Controlled size of nanoparticles and rational tuning of the composition could precisely and effectively change the catalytic properties of Pd-based materials, enhancing the electrocatalytic performance and stability. In this article, we reported a rapid and facile synthesis of reduced graphene oxide (RGO) nanosheet-supported alloys of bimetallic PdAg nanoparticles, which were directly prepared by using simultaneous ultrasonic probe irradiation method. The as-synthesized alloys of nanoparticles exhibit excellent electrocatalytic activities for ethanol oxidation and oxygen reduction reaction (ORR) in alkaline medium, including high mass (3138 mA mg −1 Pd) and specific (1.26 mA cm −2) activity on the basis of Pd mass in ethanol oxidation reaction, high electron transferred number (3.94), larger kinetic current density (5.05 mA cm −2), excellent CO tolerance, and long-term stability and durability. The physicochemical and electrochemical characterization of as-prepared electrocatalyst materials was studied by using various tools, such as FE-SEM, HR-TEM, XRD, XPS, FT-IR, CV, CA, EIS, CO-stripping, and LSV-RDE. The developed electrocatalyst is expected to open up a novel class of anode and cathode materials with excellent durability and stability for direct ethanol fuel cell.
Journal of Saudi Chemical Society
Polymers
Various studies have been conducted in recent years to find solutions to the issues in wind energ... more Various studies have been conducted in recent years to find solutions to the issues in wind energy conversion systems. A 100W horizontal axis micro wind turbine is built for low wind speed applications in this work. The Blade Element Momentum theory approach was used to design the 100W micro wind turbine blade. The wind turbine blade 3D model was created using the CREO CAD 3.0 software. Based on the aerodynamic studies, the airfoil S9000 is chosen among others for generating high power at low wind speed. The density, Young’s modulus, and the Poisson ratio of the proposed wind turbine blade model with acrylonitrile butadiene styrene (ABS) and polylactic acid (PLA) materials were compared. ABS and PLA materials were investigated using a 0.33 mm layer of infill ranging from 10% to 100%. PLA and ABS output values were compared in terms of deformation, equivalent stress, and equivalent strain. PLA materials, on the other hand, have less deformation and greater structural properties than ...
Physical Chemistry Chemical Physics
Surface treatment of TiO2 photoanodes with LiI/NaI doping leads to band bending which in turn enh... more Surface treatment of TiO2 photoanodes with LiI/NaI doping leads to band bending which in turn enhances the performance efficiency of the fabricated dye-sensitized solar cells.
New Journal of Chemistry
The current study reports on the preparation of perovskite-type CeNiO3 nanostructures as a sonoph... more The current study reports on the preparation of perovskite-type CeNiO3 nanostructures as a sonophotocatalyst via a facile hydrothermal approach followed by annealing at 800 °C.
Dalton Transactions, 2020
N-Graphyne, with a novel structure, was synthesized by the one-step ball milling of CaC2 and pyra... more N-Graphyne, with a novel structure, was synthesized by the one-step ball milling of CaC2 and pyrazine; its excellent electrocatalytic and supercapacitor properties were confirmed.
Polymer Bulletin, 2021
Poly-3-(9H-carbazol-9-yl)propylmethacrylate (pCMA) is synthesized as a polymer gel electrolyte an... more Poly-3-(9H-carbazol-9-yl)propylmethacrylate (pCMA) is synthesized as a polymer gel electrolyte and employed in the fabrication of dye-sensitized solar cells (DSSC). The pCMA was characterized by various analytical techniques to examine its structural and thermal properties. The photovoltaic and electrochemical effects of this electrolyte in DSSCs were investigated. From the results, it was found that DSSCs assembled with pCMA-PGE is an efficient electrolyte, which yields an open-circuit voltage 545 mV and current density 10 mA for a cell of area 0.25 cm2. pCMA-PGE device shows better performance (η = 2.2%), and it also performs as a good host polymer matrix for redox couple in the electrolyte.
Nanoscience and Nanotechnology Letters, 2020
Green biosynthesis of silver nanoparticles utilizing plant extracts is a simple, cost effective s... more Green biosynthesis of silver nanoparticles utilizing plant extracts is a simple, cost effective system of generating nanoparticles in an ecofriendly environment. In the present study, biosynthesis of silver nanoparticles was carried out using different parts of Madagascar periwinkle plant extracts. The production of the silver nanoparticles (AgNPs) was detected visually by change in color of the reaction mixture from yellow to reddish brown in a 8 h treatment at 37 °C. Further, the AgNPs were analyzed by various standard characterization techniques such UV-Vis spectroscopy, Electron Microscopy (TEM and SEM), FT-IR, and GC-MS analysis. The UV-Visible spectrum showed the plasmon resonance peak for AgNPs at 435 nm, indicating the formation of silver nanoparticles. FTIR analysis showed a good interaction between the plant extract and NPs. The morphology of the NPs varied in shape has observed through TEM with the particle size less than 10 nm. The phytoformulated nanoparticles were foun...
Journal of Alloys and Compounds, 2019
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
ChemistrySelect, 2018
This paper describes the synthesis of multisubstituted furans through tricyclohexylphophine media... more This paper describes the synthesis of multisubstituted furans through tricyclohexylphophine mediated intramolecular annulation of 1, 4-enediones under solvent-free greener reaction conditions. The reaction proceeds via nucleophilic attack of P (Cy) 3 on the β-carbon of 1, 4-enediones to form oxaphosphe-tanes with new CO bond formation which further eliminates O=P(Cy) 3 to afford furans. The present methodology is compatible with a wide range of substrates and enabled the synthesis of a broad range of biologically significant furan derivatives in good to excellent yields (55-93%).
International Journal of Energy Research
Frontiers of Environmental Science & Engineering, 2020
Recently, different nanomaterial-based adsorbents have received greater attention for the removal... more Recently, different nanomaterial-based adsorbents have received greater attention for the removal of environmental pollutants, specifically heavy metals from aqueous media. In this work, we synthesized few-layered MoS2 nanosheets via a surfactant-assisted hydrothermal method and utilized them as an efficient adsorbent for the removal of mercury from aqueous media. The synthesized MoS2 nanosheets showed petal-like morphology as confirmed by scanning electron microscope and high-resolution transmission electron microscopic analysis. The average thickness of the nanosheets is found to be about 57 nm. Possessing high stability and negative zeta potential makes this material suitable for efficient adsorption of mercury from aqueous media. The adsorption efficiency of the adsorbent was investigated as a function of pH, contact time and adsorbent dose. The kinetics of adsorption and reusability potential of the adsorbent were also performed. A pseudo-second-order kinetics for mercury adsorption was observed. As prepared MoS2 nanosheets showed 93% mercury removal efficiency, whereas regenerated adsorbent showed 91% and 79% removal efficiency in the respective 2nd and 3rd cycles. The adsorption capacity of the adsorbent was found to be 289 mg/g at room temperature.
IEEE Journal of the Electron Devices Society, 2018
In hybrid inorganic-organic perovskite solar cells a very stable bipolar resistive switching beha... more In hybrid inorganic-organic perovskite solar cells a very stable bipolar resistive switching behavior in the dark current-voltage characteristics at low-voltages has been observed. The possible use of the solar cell as an electrical memory with a moderate on-off contrast but very good stability over a prolonged time has been suggested. The reversible behavior and the long dynamics during the write/erase processes indicate that the physical mechanism behind the switching is related to polarization effects. A detailed analysis of the charge carrier trapping/detrapping, transport, and recombination mechanisms has been performed by taking the ion migration and the consequent charge carrier accumulation within the device into account. The charge transport during the write operation can be described by space-chargelimited conduction process. The formation and subsequent interruption of conducting pathways due to ion migration have been identified as the main cause of the resistive switching within the perovskite material. The strong interaction between the ion movement and the electron transport enables the operation of the perovskite solar cell also as a non-volatile memory.
The Analyst, 2021
Strong and weak emission is exhibited by non-luminescent RtpI and RtpH, respectively, upon the ad... more Strong and weak emission is exhibited by non-luminescent RtpI and RtpH, respectively, upon the addition of phosphate anions in CH3CN and hydrazine in CH3CN/H2O (6/4, v/v).
Bulletin of the South Ural State University Series Food and Biotechnology, 2017
Красуля Ольга Николаевна. Доктор технических наук, профессор, Московский государственный универси... more Красуля Ольга Николаевна. Доктор технических наук, профессор, Московский государственный университет технологий и управления им. К.Г. Разумовского (г. Москва),
Ultrasonics Sonochemistry, 2019
CuO@TiO heterojunction nanocomposites were prepared via ultrasonic method towards the removal of ... more CuO@TiO heterojunction nanocomposites were prepared via ultrasonic method towards the removal of the environmental pollutant of MO by the visible light photocatalytic approach. The structure of prepared CuO@TiO heterojunction nanocomposites was analyzed by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscope, transmission electron microscope, photoluminescence spectroscopy, UV-Visible absorption spectroscopy, diffused reflectance spectroscopy. The photocatalytic degradation ability was tested using methyl orange as a model pollutant. From the observed pseudo-first order reaction, it was clear that CuO@TiO nanocomposites showed enhanced photocatalytic activity (rate = 0.223 s). The formation of demethylated methyl orange as an intermediate was identified from HPLC analysis at a retention time of 3.47 min. When doped with CuO, the TiO preserved the integrity of its structural, revealing the morphology there is no significant changes have been made, favoring photoelectrochemical appliances. In presence of illumination, the photocurrent of CuO@TiO was 4.5 folds greater than that of TiO, involving that incorporating with CuO extensively enhanced mobility of electron via reducing the recombination rate of electron-hole pairs.
Industrial & Engineering Chemistry Research, 2015
Ilmenite type titanates have very wide applications in various fields. In this paper, we report t... more Ilmenite type titanates have very wide applications in various fields. In this paper, we report the synthesis of mesoporous NiTiO 3 ilmenite nanorods via a sonochemical approach. The method is very facile and effective allowing the preparation of NiTiO 3 nanoparticles with a high yield and uniform size distribution. The reaction intermediate and particularly the final product have been well characterized by various analytical tools (IR, XRD, Raman, TEM, BET, XPS). The final NiTiO 3 nanoparticles can be described as a hierarchical structure composed of small nanoparticles interconnected generating nanoporous rods. In comparison with anatase TiO 2 nanoparticles, the catalytic removal rate for the pollutant Tergitol (NP-9) by a process combined with ozonation is two and half-fold higher in the presence of mesoporous NiTiO 3 ilmenite nanorods.
Materials Chemistry and Physics, 2014
The title complex[Cu(ITSCPL-2H)(NH 3)] 2. 2H 2 O (1), is reported. The structure of the title com... more The title complex[Cu(ITSCPL-2H)(NH 3)] 2. 2H 2 O (1), is reported. The structure of the title compound, C20 H34 Cu2 O6 N10 S2 as an interesting metal complex with a Schiff base derived from isothiosemicarbazide and pyridoxal (3-hydroxy-5-hydroxymethyl-2-methylpyridine-4-carboxaldehyde) is reported. Ligand pyridoxal-S-methyliso thiosemicarbazone (PLITSC; H 2 L) is tridentate ONN ligand. The Cu II environment is a square planar coordination, the equatorial plane of which is formed by the tridentate ONN-coordinated pyridoxal-Smethyliso thiosemicarbazone and one amonium molecule. This compound crystallizes in triclinic symmetry, in
In this study, manganese oxide (MnO2) nanoparticles were synthesized by sonochemical reduction of... more In this study, manganese oxide (MnO2) nanoparticles were synthesized by sonochemical reduction of KMnO4 using polyethylene glycol (PEG) as a reducing agent as well as structure directing agent under room temperature in short duration of time and characterized by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscope (SEM), Transmission electron microscopy (TEM) and Brunauer-Emmett-Teller (BET) analysis. A supercapacitor device constructed using the ultrasonically-synthesized MnO2 nanoparticles showed maximum specific capacitance (SC) of 282Fg(-1) in the presence of 1M Ca(NO3)2 as an electrolyte at a current density of 0.5mAcm(-2) in the potential range from 0.0 to 1.0V and about 78% of specific capacitance was retained even after 1000 cycles indicating its high electrochemical stability.
Ultrasonics Sonochemistry, 2012
This paper describes a highly efficient and rapid approach of synthesizing different CuO nanostru... more This paper describes a highly efficient and rapid approach of synthesizing different CuO nanostructures in aqueous solutions using ultrasound irradiation of copper(II) acetate with urea/sodium hydroxide in the presence of polyvinylpyrrolidone (PVP), as stabilizing polymer. Field emission scanning electron microscope images clearly indicate the formation of CuO quasi-spherical microarchitectures and long-straw like structure in the presence of urea and sodium hydroxide. Other characterization techniques such as TEM, XRD and XPS are also provided to support the formation of such structures. One of the reasons for the formation of such CuO nanostructures may be due to the formation of a polymer-metal complex with the stabilizing polymer (PVP).
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Papers by Sambandam Anandan