S. K. Shinde
Dongguk University
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Featured researches published by S. K. Shinde.
RSC Advances | 2015
S. K. Shinde; Deepak P. Dubal; Gajanan Ghodake; V.J. Fulari
We report a trouble-free chemical synthesis of copper oxide (CuO) nanoflowers on flexible copper foil (Cu) and their use as electrodes for supercapacitors. Various characterization techniques, such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HR-TEM), and Brunauer–Emmett–Teller (BET) analysis, have been used to characterize CuO nanostructure. Supercapacitive properties show that CuO electrodes exhibit a high specific capacitance of about 498 F g−1 at 5 mV s−1, with a high energy density of 26 W h kg−1 in KOH electrolyte. Moreover, impedance analysis showed lower ESR value, high power performance, and an excellent rate as well as frequency response for the CuO electrodes. The excellent electrochemical properties of the CuO electrodes indicate that they have many potential applications in high-performance supercapacitors.
RSC Advances | 2015
S. K. Shinde; Deepak P. Dubal; Gajanan Ghodake; Pedro Gómez-Romero; Sungyeol Kim; V.J. Fulari
Here, we are presenting the effect of Mn doping on the supercapacitive properties of CuO/Cu(OH)2 hybrid electrodes. Briefly, Mn doped CuO/Cu(OH)2 (Mn:CuO/Cu(OH)2) thin films have been synthesized by a successive ionic layer adsorption and reaction (SILAR) method which are further characterized by different physiochemical techniques. Our results revealed the formation of hybrid CuO/Cu(OH)2 thin films with significant morphological deviation through Mn doping. Moreover, considerable positive effect of Mn doping on the electrochemical properties of hybrid CuO/Cu(OH)2 electrodes have been witnessed. Later, the results suggest that at 3% Mn doping in CuO/Cu(OH)2 electrodes with nanoflower-like nanostructures exhibits the highest specific capacitance. The maximum specific capacitance achieved for a 3% Mn:CuO/Cu(OH)2 hybrid electrode is 600 F g−1 at 5 mV s−1 in 1 M Na2SO4 electrolyte. Additionally, a Ragone plot confirms the potential of the Mn:CuO/Cu(OH)2 hybrid electrode for electrical energy storage applications.
Colloids and Surfaces B: Biointerfaces | 2017
Dae-Young Kim; Min Kim; S. K. Shinde; Jung-Suk Sung; Gajanan Ghodake
Cytotoxicity of nanoparticles needs to be examined for their biocompatibility and suitability in biomedical applications. Gallic acid method was used for the high concentration synthesis (1mM) of gold nanoparticles (AuNPs) having narrow size-distribution at ambient temperature (25°C). Gallic acid capped AuNPs were characterized by different techniques such as, UV-vis spectroscopy, TEM, EDAX, SAED, and XPS. In-vitro stability of AuNPs with biomolecules, such as glucose and bovine serum albumin (BSA) was explored at different concertation ranges. The result reveals that AuNPs are biocompatible with normal cell line mouse embryonic fibroblast (MEF) cells up to 100ppm and cell viability can be retained more than 50% even after increasing the dose from 200 to 400ppm. Antibacterial application of AuNPs revealed that both particles and surface chemistry seems to be safer for both gram positive and gram negative bacterial cultures.
RSC Advances | 2014
S. K. Shinde; Deepak P. Dubal; Gajanan Ghodake; V.J. Fulari
CdSe nanostructures (NSs) were tuned using different dopants (Fe:CdSe and Mn:CdSe) on electro-synthesized photoelectrochemical cells with fluorine-doped tin oxide (FTO) coated glass and stainless steel substrates. Thin films were characterized for their structural, morphological, and photoelectrochemical characteristics. Their optical and semiconducting parameters were also analyzed to determine the suitability of these films for photoelectrochemical (PEC)/solar cell applications. X-ray diffraction (XRD) analysis revealed that the films are polycrystalline in nature and suitable for improved solar cell applications. Scanning electron microscopy (SEM) studies illustrated that the thin films were adhered to the substrate uniformly and dopants were involved in the formation of novel nanostructured composition. Optical studies showed that the films are of direct band gap. For all the films, the semiconductor parameter values were in the better range of other transition metal chalcogenides, confirming that undoped CdSe and Fe:CdSe, Mn:CdSe thin films are capable as solar/PEC cell materials.
Journal of Semiconductors | 2014
G. M. Lohar; S. K. Shinde; V.J. Fulari
ZnSe thin films are successfully deposited by spray pyrolysis deposition technique. Deposited thin films are characterized by X-ray diffraction study, and it reveals that spray-deposited ZnSe thin films are polycrystalline with hexagonal crystal structure. Surface morphology is carried out by scanning electron microscopy. It shows cotton-like morphology, and optical properties, such as absorbance, transmittance, reflectance, band gap, refractive index, extinction coefficient are studied. Photoluminescence shows strong emission at 497 nm. Also, spray-deposited ZnSe thin films are hydrophilic in nature, which is shown by contact angle meter.
Scientific Reports | 2017
Dae-Young Kim; Gajanan Ghodake; N. C. Maile; A. A. Kadam; Dae Sung Lee; V. J. Fulari; S. K. Shinde
In this study, hierarchical interconnected nickel cobalt sulfide (NiCo2S4) nanosheets were effectively deposited on a flexible stainless steel foil by the chemical bath deposition method (CBD) for high-performance supercapacitor applications. The resulting NiCo2S4 sample was characterized by X-ray powder diffraction (XRD), field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), and electrochemical measurements. XRD and X-ray photoelectron spectroscopy (XPS) results confirmed the formation of the ternary NiCo2S4 sample with a pure cubic phase. FE-SEM and HR-TEM revealed that the entire foil surface was fully covered with the interconnected nanosheets like surface morphology. The NiCo2S4 nanosheets demonstrated impressive electrochemical characteristics with a specific capacitance of 1155 F g−1 at 10 mV s−1 and superior cycling stability (95% capacity after 2000 cycles). These electrochemical characteristics could be attributed to the higher active area and higher conductivity of the sample. The results demonstrated that the interconnected NiCo2S4 nanosheets are promising as electrodes for supercapacitor and energy storage applications.
Journal of the Science of Food and Agriculture | 2018
Dae-Young Kim; Avinash A. Kadam; S. K. Shinde; Rijuta Ganesh Saratale; Jayanta Kumar Patra; Gajanan Ghodake
The applications and benefits of nanotechnology in the agricultural sector have attracted considerable attention, particularly in the invention of unique nanopesticides and nanofertilisers. The contemporary developments in nanotechnology are acknowledged and the most significant opportunities awaiting the agriculture sector from the recent scientific and technical literature are addressed. This review discusses the significance of recent trends in nanomaterial-based sensors available for the sustainable management of agricultural soil, as well as the role of nanotechnology in detection and protection against plant pathogens, and for food quality and safety. Novel nanosensors have been reported for primary applications in improving crop practices, food quality, and packaging methods, thus will change the agricultural sector for potentially better and healthier food products. Nanotechnology is well-known to play a significant role in the effective management of phytopathogens, nutrient utilisation, controlled release of pesticides, and fertilisers. Research and scientific gaps to be overcome and fundamental questions have been addressed to fuel active development and application of nanotechnology. Together, nanoscience, nanoengineering, and nanotechnology offer a plethora of opportunities, proving a viable alternative in the agriculture and food processing sector, by providing a novel and advanced solutions.
Journal of Colloid and Interface Science | 2017
Dae-Young Kim; S. K. Shinde; Gajanan Ghodake
High reducibility of gallic acid allows synthesis of small sized monodisperse gold nanoparticles (GNPs) at ambient temperature (25°C). Mg2+ rapidly interacts with the gallic acid ligands and suppresses the dispersion of GNPs therefore, causing a decrease in UV-vis absorbance intensity, and color change from red to blue. Thus, the colorimetric response of GNPs with Mg2+ was investigated by observing temporal quenching of UV-vis absorbance and precise tuning of fractal growth of GNP aggregates. Moreover, Mg2+ at concentrations as low as 200ppb can be detected using gallic acid ligand-mediated coordination chemistry which results quenching in UV-vis absorbance proportional to the exposure time. This gallic acid-based colorimetric sensor shown a great potential for the selective detection of pathologically important electrolyte Mg2+ without any interference from other cations Ca2+ and K+.
Colloids and Surfaces B: Biointerfaces | 2017
S. K. Shinde; V.J. Fulari; D.-Y. Kim; N.C. Maile; R.R. Koli; H.D. Dhaygude; Gajanan Ghodake
In this research article, we report hybrid nanomaterials of copper hydroxide/copper oxide (Cu(OH)2/CuO). A thin films were prepared by using a facile and cost-effective successive ionic layer adsorption and reaction (SILAR) method. As-synthesized and hybrid Cu(OH)2/CuO with two different surfactants polyvinyl alcohol (PVA) and triton-X 100 (TRX-100) was prepared having distinct morphological, structural, and supercapacitor properties. The surface of the thin film samples were examined by scanning electron microscopy (SEM). A nanoflower-like morphology of the Cu(OH)2/CuO nanostructures arranged vertically was evidenced on the stainless steel substrate. The surface was well covered by nanoflake-like morphology and formed a uniform Cu(OH)2/CuO nanostructures after treating with surfactants. X-ray diffraction patterns were used to confirm the hybrid phase of Cu(OH)2/CuO materials. The electrochemical properties of the pristine Cu(OH)2/CuO, PVA:Cu(OH)2/CuO, TRX-100:Cu(OH)2/CuO films were observed by cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy technique. The electrochemical examination reveals that the Cu(OH)2/CuO electrode has excellent specific capacitance, 292, 533, and 443Fg-1 with pristine, PVA, and TRX-100, respectively in 1M Na2SO4 electrolyte solution. The cyclic voltammograms (CV) of Cu(OH)2/CuO electrode shows positive role of the PVA and TRX-100 to enhance supercapacitor performance.
Materials Research Express | 2016
H. D. Dhaygude; S. K. Shinde; Ninad B. Velhal; M. V. Takale; V.J. Fulari
In the present study, a novel chemical route is used to synthesize the undoped and Cu-doped ZnO thin films in aqueous solution by successive ionic layer adsorption and reaction (SILAR) method. The synthesized thin films are characterized by x-ray diffractometer (XRD), field emission scanning electron microscopy (FE-SEM), energy dispersive x-ray analysis (EDAX), contact angle goniometer and UV–Vis spectroscopic techniques. XRD study shows that the prepared films are polycrystalline in nature with hexagonal crystal structure. The change in morphology for different doping is observed in the studies of FE-SEM. EDAX spectrum shows that the thin films consist of zinc, copper and oxygen elements. Contact angle goniometer is used to measure the contact angle between a liquid and a solid interface and after detection, the nature of the films is initiated from hydrophobic to hydrophilic. The optical band gap energy for direct allowed transition ranging between 1.60–2.91 eV is observed.