The Experts below are selected from a list of 219 Experts worldwide ranked by ideXlab platform

Y D Kolekar - One of the best experts on this subject based on the ideXlab platform.

  • spray deposited hausmannite mn3o4 thin films using aqueous Organic Solvent Mixture for supercapacitor applications
    Electrochimica Acta, 2016
    Co-Authors: Abhijit A Yadav, S N Jadhav, D M Chougule, P D Patil, U J Chavan, Y D Kolekar
    Abstract:

    Abstract Manganese oxide (Mn 3 O 4 ) is considered one of the most promising materials for high-performance supercapacitors due to its extraordinary theoretical specific capacitance, low-cost, environmental benignity and natural abundance. Mn 3 O 4 thin films have been deposited by spray pyrolysis using aqueous/Organic Solvent Mixture. These films were characterized for structural, morphological, optical and electrical measurements. The electrochemical performance of the supercapacitor was studied by using cyclic voltammetry curves recorded at different scan rates. The porous Mn 3 O 4 thin film electrode exhibits significantly improved supercapacitive performance in 1 M Na 2 SO 4 electrolyte with highest specific capacitance of 394 F g −1 at scan rate of 10 m Vs −1 for film deposited at 350 °C. The specific energy and specific power are found to be 8.27 Wh kg −1 and 850 W kg −1 , respectively, at a current density of 1 A g −1 . The specific capacitance of the Mn 3 O 4 electrode maintains 93.01% of its initial value after 1000 cycles, at a current density of 1 A g −1 showing a good cycling stability.

  • Spray deposited Hausmannite Mn3O4 thin films using aqueous/Organic Solvent Mixture for supercapacitor applications
    Electrochimica Acta, 2016
    Co-Authors: Abhijit A Yadav, S N Jadhav, D M Chougule, P D Patil, U J Chavan, Y D Kolekar
    Abstract:

    Abstract Manganese oxide (Mn 3 O 4 ) is considered one of the most promising materials for high-performance supercapacitors due to its extraordinary theoretical specific capacitance, low-cost, environmental benignity and natural abundance. Mn 3 O 4 thin films have been deposited by spray pyrolysis using aqueous/Organic Solvent Mixture. These films were characterized for structural, morphological, optical and electrical measurements. The electrochemical performance of the supercapacitor was studied by using cyclic voltammetry curves recorded at different scan rates. The porous Mn 3 O 4 thin film electrode exhibits significantly improved supercapacitive performance in 1 M Na 2 SO 4 electrolyte with highest specific capacitance of 394 F g −1 at scan rate of 10 m Vs −1 for film deposited at 350 °C. The specific energy and specific power are found to be 8.27 Wh kg −1 and 850 W kg −1 , respectively, at a current density of 1 A g −1 . The specific capacitance of the Mn 3 O 4 electrode maintains 93.01% of its initial value after 1000 cycles, at a current density of 1 A g −1 showing a good cycling stability.

Abhijit A Yadav - One of the best experts on this subject based on the ideXlab platform.

  • spray deposited hausmannite mn3o4 thin films using aqueous Organic Solvent Mixture for supercapacitor applications
    Electrochimica Acta, 2016
    Co-Authors: Abhijit A Yadav, S N Jadhav, D M Chougule, P D Patil, U J Chavan, Y D Kolekar
    Abstract:

    Abstract Manganese oxide (Mn 3 O 4 ) is considered one of the most promising materials for high-performance supercapacitors due to its extraordinary theoretical specific capacitance, low-cost, environmental benignity and natural abundance. Mn 3 O 4 thin films have been deposited by spray pyrolysis using aqueous/Organic Solvent Mixture. These films were characterized for structural, morphological, optical and electrical measurements. The electrochemical performance of the supercapacitor was studied by using cyclic voltammetry curves recorded at different scan rates. The porous Mn 3 O 4 thin film electrode exhibits significantly improved supercapacitive performance in 1 M Na 2 SO 4 electrolyte with highest specific capacitance of 394 F g −1 at scan rate of 10 m Vs −1 for film deposited at 350 °C. The specific energy and specific power are found to be 8.27 Wh kg −1 and 850 W kg −1 , respectively, at a current density of 1 A g −1 . The specific capacitance of the Mn 3 O 4 electrode maintains 93.01% of its initial value after 1000 cycles, at a current density of 1 A g −1 showing a good cycling stability.

  • influence of electrode mass loading on the properties of spray deposited mn3o4 thin films for electrochemical supercapacitors
    Thin Solid Films, 2016
    Co-Authors: Abhijit A Yadav
    Abstract:

    Abstract Mn 3 O 4 thin film electrodes with various mass-loadings are deposited by spray pyrolysis using aqueous/Organic Solvent Mixture. The influence of mass-loading on the electrochemical properties of Mn 3 O 4 thin film electrodes is studied. The results showed that, the as-prepared Mn 3 O 4 exhibited ideal capacitive behavior in a voltage window of − 0.2 to 0.4 V. With increasing of Mn 3 O 4 mass-loading from 0.47 mg cm − 2 to 0.64 mg cm − 2 , the specific capacitance calculated from the cyclic voltammetry curves at 5 mV s − 1 increased from 520 to 597 F·g − 1 . The specific energy and specific power are found to be 3735 Wh kg − 1 and 12.45 W kg − 1 respectively at a current density of 4.0 A·g − 1 for film having 0.64 mg cm − 2 mass-loading. Ragone plots indicated that the Mn 3 O 4 electrode with 0.64 mg cm − 2 mass-loading possessed good power-energy density characteristics. The electrochemical performances of 0.64 mg cm − 2 mass-loading Mn 3 O 4 thin film electrode suggest suitability of this material as a potential electrode material for supercapacitors.

  • Spray deposited Hausmannite Mn3O4 thin films using aqueous/Organic Solvent Mixture for supercapacitor applications
    Electrochimica Acta, 2016
    Co-Authors: Abhijit A Yadav, S N Jadhav, D M Chougule, P D Patil, U J Chavan, Y D Kolekar
    Abstract:

    Abstract Manganese oxide (Mn 3 O 4 ) is considered one of the most promising materials for high-performance supercapacitors due to its extraordinary theoretical specific capacitance, low-cost, environmental benignity and natural abundance. Mn 3 O 4 thin films have been deposited by spray pyrolysis using aqueous/Organic Solvent Mixture. These films were characterized for structural, morphological, optical and electrical measurements. The electrochemical performance of the supercapacitor was studied by using cyclic voltammetry curves recorded at different scan rates. The porous Mn 3 O 4 thin film electrode exhibits significantly improved supercapacitive performance in 1 M Na 2 SO 4 electrolyte with highest specific capacitance of 394 F g −1 at scan rate of 10 m Vs −1 for film deposited at 350 °C. The specific energy and specific power are found to be 8.27 Wh kg −1 and 850 W kg −1 , respectively, at a current density of 1 A g −1 . The specific capacitance of the Mn 3 O 4 electrode maintains 93.01% of its initial value after 1000 cycles, at a current density of 1 A g −1 showing a good cycling stability.

A K Singh - One of the best experts on this subject based on the ideXlab platform.

  • the influence of Solvent on the solvolysis of ethyl cinnamate in wateracetonemixed Solvent system
    Chemical Science, 2017
    Co-Authors: A K Singh
    Abstract:

    The kinetic of alkaline hydrolysis of ethyl cinnamate was investigated at different percentage of aqua-Organic Solvent Mixture with Acetone (30 to 70% v/v) over the temperature range of 20°C to 40°C. The specific rate constant was found to be decreased with increasing proportion of Solvent (Acetone) at all the temperature range. The Iso-composition Activation energy (EC) was also evaluated which decreases with Solvent composition in (water-Acetone) system. The number of water molecule associated with the activated complex is found to be increase (0.7003 to 0.786) in waterAcetone system. The thermodynamic activation parameter such as Enthalpy of Activation (Δ H* ), Entropy of Activation (Δ S* ) and Gibb’s free energy of activation (Δ G* ) were also calculated.

  • the influence of Solvent on the solvolysis of ethyl cinnamate in wateracetonemixed Solvent system
    Chemical Science, 2017
    Co-Authors: A K Singh
    Abstract:

    The kinetic of alkaline hydrolysis of ethyl cinnamate was investigated at different percentage of aqua-Organic Solvent Mixture with Acetone (30 to 70% v/v) over the temperature range of 20°C to 40°C. The specific rate constant was found to be decreased with increasing proportion of Solvent (Acetone) at all the temperature range. The Iso-composition Activation energy (EC) was also evaluated which decreases with Solvent composition in (water-Acetone) system. The number of water molecule associated with the activated complex is found to be increase (0.7003 to 0.786) in waterAcetone system. The thermodynamic activation parameter such as Enthalpy of Activation (Δ H* ), Entropy of Activation (Δ S* ) and Gibb’s free energy of activation (Δ G* ) were also calculated.

  • the influence of Solvent on the solvolysis of ethyl cinnamate in water acetone Mixtures
    International Research Journal of Multidisciplinary Studies, 2017
    Co-Authors: A K Singh
    Abstract:

    The kinetic of alkaline hydrolysis of Ethyl Cinnamate was investigated at different percentage of aqua-Organic Solvent Mixture with Acetone (30 to 70% v/v) over the temperature range of 20 o C to 40 o C. The specific rate constant was found to be decrease in the Solvent with increasing proportion of Solvent (Acetone) at all the temperature range. The Iso-composition Activation energy (E C ) were also evaluated which decreases with Solvent composition in (water-Acetone) system. The number of water molecule associated with the activated complex is found to be increase(0.7003to 0.786) in  water-Acetone system. The Thermodynamic Activation Parameter such as Enthalpy of Activation (DH * ), Entropy of Activation (DS * ) and Gibb's free energy of activation (DG * ) were also calculated. Key Word- Solvolysis, Solvent-solute interaction, Iso composition Energy, Activated complex Activation parameters.

  • The influence of Solvent on the solvolysis of Ethyl cinnamate in water–Acetone Mixtures
    International Research Journal of Multidisciplinary Studies, 2017
    Co-Authors: A K Singh
    Abstract:

    The kinetic of alkaline hydrolysis of Ethyl Cinnamate was investigated at different percentage of aqua-Organic Solvent Mixture with Acetone (30 to 70% v/v) over the temperature range of 20 o C to 40 o C. The specific rate constant was found to be decrease in the Solvent with increasing proportion of Solvent (Acetone) at all the temperature range. The Iso-composition Activation energy (E C ) were also evaluated which decreases with Solvent composition in (water-Acetone) system. The number of water molecule associated with the activated complex is found to be increase(0.7003to 0.786) in  water-Acetone system. The Thermodynamic Activation Parameter such as Enthalpy of Activation (DH * ), Entropy of Activation (DS * ) and Gibb's free energy of activation (DG * ) were also calculated. Key Word- Solvolysis, Solvent-solute interaction, Iso composition Energy, Activated complex Activation parameters.

  • the influence of Solvent on the solvolysis of ethyl cinnamate in water acetone Mixtures
    International Research Journal of Multidisciplinary Studies, 2017
    Co-Authors: A K Singh
    Abstract:

    The kinetic of alkaline hydrolysis of Ethyl Cinnamate was investigated at different percentage of aqua-Organic Solvent Mixture with Acetone (30 to 70% v/v) over the temperature range of 20 o C to 40 o C. The specific rate constant was found to be decrease in the Solvent with increasing proportion of Solvent (Acetone) at all the temperature range. The Iso-composition Activation energy (E C ) were also evaluated which decreases with Solvent composition in (water-Acetone) system. The number of water molecule associated with the activated complex is found to be increase(0.7003to 0.786) in  water-Acetone system. The Thermodynamic Activation Parameter such as Enthalpy of Activation (DH * ), Entropy of Activation (DS * ) and Gibb's free energy of activation (DG * ) were also calculated. Key Word- Solvolysis, Solvent-solute interaction, Iso composition Energy, Activated complex Activation parameters.

Carina Ladeira - One of the best experts on this subject based on the ideXlab platform.

  • the genotoxicity of an Organic Solvent Mixture a human biomonitoring study and translation of a real scenario exposure to in vitro
    Regulatory Toxicology and Pharmacology, 2020
    Co-Authors: Carina Ladeira, Goran Gajski, Marcia Meneses, Marko Geric, Susana Viegas
    Abstract:

    Abstract This study aimed to evaluate occupational exposure to a styrene and xylene Mixture through environmental exposure assessment and identify the potential genotoxic effects through biological monitoring. Secondly, we also exposed human peripheral blood cells in vitro to both xylene and styrene either alone or in Mixture at concentrations found in occupational settings in order to understand their mechanism of action. The results obtained by air monitoring were below the occupational exposure limits for both substances. All biomarkers of effect, except for nucleoplasmic bridges, had higher mean values in workers (N = 17) compared to the corresponding controls (N = 17). There were statistically significant associations between exposed individuals and the presence of nuclear buds and oxidative damage. As for in vitro results, there was no significant influence on primary DNA damage in blood cells as evaluated by the comet assay. On the contrary, we did observe a significant increase of micronuclei and nuclear buds, but not nucleoplasmic bridges upon in vitro exposure. Taken together, both styrene and xylene have the potential to induce genomic instability either alone or in combination, showing higher effects when combined. The obtained data suggested that thresholds for individual chemicals might be insufficient for ensuring the protection of human health.

Susana Viegas - One of the best experts on this subject based on the ideXlab platform.

  • the genotoxicity of an Organic Solvent Mixture a human biomonitoring study and translation of a real scenario exposure to in vitro
    Regulatory Toxicology and Pharmacology, 2020
    Co-Authors: Carina Ladeira, Goran Gajski, Marcia Meneses, Marko Geric, Susana Viegas
    Abstract:

    Abstract This study aimed to evaluate occupational exposure to a styrene and xylene Mixture through environmental exposure assessment and identify the potential genotoxic effects through biological monitoring. Secondly, we also exposed human peripheral blood cells in vitro to both xylene and styrene either alone or in Mixture at concentrations found in occupational settings in order to understand their mechanism of action. The results obtained by air monitoring were below the occupational exposure limits for both substances. All biomarkers of effect, except for nucleoplasmic bridges, had higher mean values in workers (N = 17) compared to the corresponding controls (N = 17). There were statistically significant associations between exposed individuals and the presence of nuclear buds and oxidative damage. As for in vitro results, there was no significant influence on primary DNA damage in blood cells as evaluated by the comet assay. On the contrary, we did observe a significant increase of micronuclei and nuclear buds, but not nucleoplasmic bridges upon in vitro exposure. Taken together, both styrene and xylene have the potential to induce genomic instability either alone or in combination, showing higher effects when combined. The obtained data suggested that thresholds for individual chemicals might be insufficient for ensuring the protection of human health.