Papers by Dr. Pravin Ingole
Physical Chemistry Chemical Physics, 2019
Probing absolute electronic energy levels in semiconductor quantum dots (Q-dots) is crucial for e... more Probing absolute electronic energy levels in semiconductor quantum dots (Q-dots) is crucial for engineering their electronic band structure and hence for precise design of composite nano-structure based devices.
Social Science Research Network, 2023
Journal of CO2 Utilization
Green Chemistry and Sustainable Technology, 2021
Green Chemistry and Sustainable Technology, 2021
Journal of Materials Chemistry A, 2020
The energy density of the present state-of-the-art materials remains the main challenge for comme... more The energy density of the present state-of-the-art materials remains the main challenge for commercial utilization of supercapacitor devices.
ChemistrySelect, 2020
Present study explores stabilization of copper/cuprous oxide nanomaterials using amino acids as c... more Present study explores stabilization of copper/cuprous oxide nanomaterials using amino acids as capping agents. The onepot and time efficient synthesis method have been employed to synthesize amino acids functionalized copper nanomaterials. The nanomaterials are composed of both copper (0) and copper (I) species and are stable towards environmental oxidation under ambient conditions. Eight different amino acids were used for surface functionalization of the Cu/Cu 2 O nanocomposites where the type of amino acids are found to play an important role in manipulating the morphology, crystalline nature and the optical properties of the synthesized nanocomposites. Moreover, these materials are tested for electrochemical water splitting process and are found superior to traditional Cu-based electro-catalysts reported in literature. The capping with amino acids lead to modification in the electro-chemical parameters such as charge carrier density, flat band potential, electrochemical surface area, etc. activity dependent on amino acid used. Among these amino acids, Alanine capped nanocomposites gave highest current density of 125 � 5 mA cm À 2 at an over potential of À 0.4 V vs. RHE.
ECS Meeting Abstracts, 2018
A well-tamed energy conversion strategy for the valorization of CO2 is a necessity for maintainin... more A well-tamed energy conversion strategy for the valorization of CO2 is a necessity for maintaining a check on CO2 levels (~ 500ppm) and borrow enough time for the scientific community to perfect zero-emission fuel prospects. Mimicking photosynthetically fixed CO2 by plants in an electrochemical cell is both scientifically intriguing and sociologically promising- given more than half of world still runs on fossil fuel derived energy and standard of life are determined by the intake of energy. Catalysing CO2RR with economical, selective heterogeneous metal nano-structures proved a promising way to improve upon the status quo. We synthesised copper octahedrons by two electrode electrodeposition, to selectively reduce CO2RR into CO2+H2 (synthesis gas) to use it as starting material in well known Fischer-tropsch reaction. In a representative experiment, copper was dissolved from a sacrificial copper anode and collected as micro-octahedrons on the surface of a platinum foil. The structure...
ChemistrySelect, 2018
Enhanced electrochemical capacitance of 2D-nanosheets of Ni (OH) 2 via reinforcement of star-shap... more Enhanced electrochemical capacitance of 2D-nanosheets of Ni (OH) 2 via reinforcement of star-shaped CuS flat nanoflakes synthesized using in-situ hydrothermal root is presented. Microscopic and structural characterization suggest the inclusion of CuS nanoflakes in the films. Reinforced CuS nanoflakes offer high surface area resulting into open-sheet morphologies for Ni(OH) 2 @CuS films; contrasting with the folded sheet structures attained for the neat Ni(OH) 2 films. The remarkably high bulk (10 À 3 S cm À 1) conductivity of CuS enhances the conductivity and enable facile electron transport in the composites. Asymmetric supercapacitors constructed using Ni (OH) 2 @CuS and graphite as the electrodes is noted to show specific capacitances of 642 Fg À 1 at current density of 1 Ag À 1 , good rate capability and excellent cycling stability (86% capacitance retention at the end of 1000 cycles) relative to the neat Ni(OH) 2 based supercapacitor cells that shows specific capacitance of 142 Fg À 1 at the same current density. The direct contact of Ni(OH) 2 with the conductive CuS nanoflakes and highly porous structures of Ni(OH) 2 @CuS electrodes doubles the power densities of the Ni(OH) 2 @CuS supercapacitors than Ni(OH) 2 cells due to the low ion-diffusion resistances for charging by ions from the electrolyte, afforded by the short diffusion pathways in the composites.
The Journal of Physical Chemistry C, 2011
The Journal of Physical Chemistry C, 2011
The Journal of Physical Chemistry C, 2013
ABSTRACT The band gap bowing effect in oleic acid-stabilized CdSxSe1–x alloy quantum dots (Q-dots... more ABSTRACT The band gap bowing effect in oleic acid-stabilized CdSxSe1–x alloy quantum dots (Q-dots) with varying composition has been studied experimentally by means of cyclic voltammetry and theoretically using density functional theory based calculations. Distinct cathodic and anodic peaks observed in the cyclic voltammograms of diffusing quantum dots alloy are attributed to the respective conduction and valence band edges. The quasi-particle gap values determined from voltammetric measurements are compared with interband transition peaks in UV–vis and PL spectra. Electronic structure for alloy Q-dots is determined computationally with projector augmented wave method for a particular size of dots. The band gap bowing is observed predominantly in the conduction band states. The bowing parameter determined experimentally (0.45 eV) has been found to be in good agreement with the one estimated from DFT (0.43 eV).
Journal of Applied Polymer Science, 2007
Polyamide (PA) fine powders or granules, obtained by anionic solution/suspension polymerization o... more Polyamide (PA) fine powders or granules, obtained by anionic solution/suspension polymerization of lactams, were used for the sorption of reactive dye Brilliant Red HE-3B from aqueous solutions. They provided a relatively large surface area and porosity that allowed an increased sorption rate. The visible molecular absorption spectroscopy was used to evaluate the performance of the investigated systems. Under the same conditions, the sorption capacity of polyamide particles decreases in the following manner: PA6-powders > PA12-powders > PA4-granules. The effect of pH, initial dye concentration, temperature, and sorption duration on dye removal was studied for the PA6-powder/reactive dye system. The equilibrium sorption isotherms have been analyzed by the linear, Freundlich, and Langmuir models. The data conform to a Langmuir isotherm and a pseudosecond order kinetic model, respectively. In addition, the apparent thermodynamic parameters were calculated and the obtained values support the conclusion that the reactive dye molecules are adsorbed onto PA-powders by an entropy-driven, endothermic process.
Zeitschrift für Physikalische Chemie, 2013
The photoluminescence (PL) properties of TOPO capped CdSe quantum dots (Q-CdSe) monolayers deposi... more The photoluminescence (PL) properties of TOPO capped CdSe quantum dots (Q-CdSe) monolayers deposited on indium tin oxide (ITO) substrates and incorporated into an electrochemical cell have been studied. In particular, the effect of electrochemical charge injection by combining the electrochemical setup with fluorescence spectroscopy has been investigated. It was observed that when positive potentials are applied to the film in electrolyte solution, the PL is irreversibly quenched. However, the PL quenching observed after applying negative potentials to the substrate was reversible. In addition, the changes in the PL exhibit characteristic profiles at particular applied potentials. Voltammetric measurements were performed to further understand the possible origins of the specific PL changes as a function of applied potential. The results have the prospect to prove helpful in explaining the phenomenon of PL intermittency or blinking in semiconductor quantum dots.
Sustainable Energy & Fuels, 2022
Development of an efficient non-precious metal-based bi-functional oxygen electro-catalyst for ox... more Development of an efficient non-precious metal-based bi-functional oxygen electro-catalyst for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is crucial for various electrochemical energy conversion and storage devices. Prussian...
ECS Meeting Abstracts, 2021
Journal of Materials Chemistry A, 2021
The epitaxial growth of Cu2S NCs over the inert basal planes of MoSe2 NSs increases the number of... more The epitaxial growth of Cu2S NCs over the inert basal planes of MoSe2 NSs increases the number of active sites for OER. The built-in electric field at interfaces greatly favors the OER and HER activities via decreasing the energy barriers.
Environmental Science: Nano, 2021
Fabrication of 0.15MoSe2@BiVO4 by hydrothermal method and its immobilization on Luffa cylindrica.... more Fabrication of 0.15MoSe2@BiVO4 by hydrothermal method and its immobilization on Luffa cylindrica. Morphology of 0.15MoSe2@BiVO4–Luffa revealed by SEM image.
Molecular Systems Design & Engineering, 2020
Self-assembling hybrid peptide-based organic field effect transistors are reported that showed hi... more Self-assembling hybrid peptide-based organic field effect transistors are reported that showed high mobilities up to 9.3 cm2 V−1 s−1 and significant air stability.
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Papers by Dr. Pravin Ingole