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Shinde, K. P.,Jang, S. H.,Kim, J. W.,Kim, D. S.,Ranot, M.,Chung, K. C. The Royal Society of Chemistry 2015 Dalton transactions Vol.44 No.47
<P>We report for the first time the synthesis of nanopowders of TbN, DyN and HoN crystallized in a cubic structure by the plasma arc discharge (PAD) method and investigate their magnetocaloric properties for magnetic refrigeration applications. The nitridization of terbium, dysprosium and holmium was obtained using a mixture of nitrogen and argon gas inside a discharge chamber with 4 kPa pressure. The structural and microstructural properties of these rare earth nitrides were investigated by using X-ray diffraction and transmission electron microscopy. The studied nitrides undergo a second-order ferromagnetic to paramagnetic phase transition at Curie temperatures of 35.7, 19.9 and 14.2 K for TbN, DyN and HoN, respectively. The magnetocaloric effects were estimated by calculating the magnetic entropy changes from the magnetization data sets measured at the different applied magnetic fields and temperatures. The changes in entropy −Δ<I>S</I><SUB>M</SUB> were found to be 12.0, 13.6 and 24.5 J kg<SUP>−1</SUP> K<SUP>−1</SUP> at an applied magnetic field of 5 T.</P> <P>Graphic Abstract</P><P>We report for the first time the synthesis of nanopowders of TbN, DyN and HoN crystallized in a cubic structure by the plasma arc discharge (PAD) method and investigate their magnetocaloric properties for magnetic refrigeration applications. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c5dt03528g'> </P>
Shinde, Pritamkumar V.,Ghule, Balaji G.,Shinde, Nanasaheb M.,Xia, Qi Xun,Shaikh, Shoyebmohamad,Sarode, A. V.,Mane, Rajaram S.,Kim, Kwang Ho The Royal Society of Chemistry 2018 New journal of chemistry Vol.42 No.15
<P>The acetone gas sensor and electrochemical supercapacitor applications of bismuth oxide (Bi2O3) nanostructures, synthesised using a facile and cost-effective quaternary-beaker mediated successive ion transfer wet chemical method and deposited onto soda-lime-glass (SLG) and Ni-foam substrates, respectively, are explored. The as-deposited Bi2O3 nanostructures on these substrates exhibit polycrystalline nature and a slight change in their surface appearance (<I>i.e.</I> upright-standing nanoplates on SLG and a curvy nanosheet structure on Ni-foam), suggesting the importance of the deposition substrate in developing Bi2O3 morphologies. The Bi2O3 nanoplate gas sensor on the SGL demonstrated a room temperature sensitivity of 41%@100 ppm for acetone gas, whereas the nanosheet structure of Bi2O3 on the Ni-foam elucidated a specific capacitance of 402 F g<SUP>−1</SUP> at 2 mA cm<SUP>−2</SUP>, long-term cyclability, and rate capability with moderate chemical and environmental stability in a 6 M KOH electrolyte solution. The Bi2O3//graphite pencil-type asymmetric supercapacitor device revealed a specific capacitance as high as 43 F g<SUP>−1</SUP>, and an energy density of 13 W h kg<SUP>−1</SUP> at 793 W kg<SUP>−1</SUP> power density, turning a light emitting diode ON, with considerable full-brightness light intensity, during the process of discharging.</P>
Shinde, Pragati A.,Seo, Youngho,Ray, Chaiti,Jun, Seong Chan Elsevier 2019 ELECTROCHIMICA ACTA Vol.308 No.-
<P><B>Abstract</B></P> <P>The rational design and development of highly conductive hierarchical nanostructured materials are of great importance to improve the electrochemical performance of supercapacitors. Great efforts have been committed to the development of positive electrodes for asymmetric supercapacitors (ASC). However, it is still necessary to develop better negative electrodes for practical applications. In present investigation, a multi-walled carbon nanotubes-tungsten trioxide (MWCNT-WO<SUB>3</SUB>) hybrid nanostructure is prepared as a negative electrode for ASC. The MWCNT-WO<SUB>3</SUB> hybrid electrode is prepared using a simple two-step approach, which involves coating of MWCNTs on carbon cloth substrates followed by hydrothermal treatment to deposit WO<SUB>3</SUB> nanorods on the MWCNT-coated carbon cloth. The MWCNT-WO<SUB>3</SUB> hybrid electrode exhibits a maximum specific capacitance (areal capacitance) of 429.6 F g<SUP>−1</SUP> (1.55 F cm<SUP>−2</SUP>) and capacity retention of 94.3% after 5000 cycles, which are higher than the 155.6 F g<SUP>−1</SUP> (0.43 F cm<SUP>−2</SUP>) and 84.9% shown by pristine WO<SUB>3</SUB> in 1 M LiClO<SUB>4</SUB> electrolyte. A flexible all-solid-state ASC is self-assembled with MWCNT-WO<SUB>3</SUB> as a negative electrode, MnO<SUB>2</SUB> as a positive electrode, and PVA-LiClO<SUB>4</SUB> as a gel electrolyte. The MnO<SUB>2</SUB>//MWCNT-WO<SUB>3</SUB> ASC achieve specific capacitance of 145.6 F g<SUP>−1</SUP> at a current of 2 mA and specific energy of 39.63 Wh kg<SUP>−1</SUP> at a specific power of 546 W kg<SUP>−1</SUP>. Specifically, the ASC exhibits superior long-term cycling stability (77% over 10000 cycles) and excellent mechanical flexibility with less capacitance loss. These remarkable results demonstrate the potential of using MWCNT-WO<SUB>3</SUB> hybrid nanostructures for the fabrication of high-performance energy storage devices.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Hexagonal WO<SUB>3</SUB> nanorods are uniformly grown on MWCNT coated carbon cloth. </LI> <LI> MWCNT-WO<SUB>3</SUB> hybrid exhibits high specific capacitance of 429.6 F g<SUP>−1</SUP> at 2 mA cm<SUP>−2</SUP>. </LI> <LI> MWCNT-WO<SUB>3</SUB> hybrid maintains 94.3% initial capacitance over 5000 cycles. </LI> <LI> Flexible asymmetric supercapacitor shows high specific energy of 39.63 Wh kg<SUP>−1</SUP>. </LI> </UL> </P>
Shinde, S.K.,Kim, D.-Y.,Ghodake, G.S.,Maile, N.C.,Kadam, A.A.,Lee, Dae Sung,Rath, M.C.,Fulari, V.J. Elsevier 2018 Ultrasonics sonochemistry Vol.40 No.1
<P><B>Abstract</B></P> <P>This paper reports the effect of electron beam irradiation on CuO thin films synthesized by the successive ionic layer adsorption and reaction (SILAR) method on copper foil for supercapacitor and biocompatibility application. Pristine and irradiated samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, and electrochemical study. Pristine and irradiated CuO films were pure monoclinic phase, with uniform nanostructures over the whole copper foil. After irradiation, CuO samples had formed innovative nanostructures. Biocompatibility of pristine and irradiated CuO samples suggest that CuO sample is non-toxic and ecofriendly. The specific capacitance of pristine and irradiated CuO strongly depends on surface morphology, and CuO electrodes after irradiation showed superior performance than pristine CuO. The highest specific capacitance of the 20kGy irradiated CuO nanoflowers exceeded 511Fg<SUP>−1</SUP> at 10mVs<SUP>−1</SUP> in 1M KOH electrolyte. Irradiated CuO samples also showed lower ESR, and were superior to other report electrical energy storage materials.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Novel route for the synthesis of pure CuO thin films. </LI> <LI> Different nanostructure of pure CuO and irradiated CuO electrode. </LI> <LI> 20kGy irradiated CuO electrode offer high surface area. </LI> <LI> 20kGy irradiated CuO electrode shows excellent supercapacitive properties. </LI> </UL> </P>
Shinde, Vijay Vilas,Lee, Seung Min,Oh, Jeong Su,Lim, Kwon Taek,Jeong, Yeon Tae Informa UK (TaylorFrancis) 2016 Synthetic communications Vol.46 No.13
<P>An ultrasound-promoted, environmentally benign, efficient procedure has been developed for the synthesis of biologically active tetrahydro-1H-indol-4(5H)-one using heterogeneous BrOnsted base silica sodium carbonate (SSC) as a catalyst under solvent-free conditions. In comparison to the conventional methods, this efficient green protocol provides remarkable advantages such as good to excellent yields, shorter reaction time, low cost, and easy workup procedure and bypasses the use of hazardous transition-metal catalysts and organic solvents. [GRAPHICS] .</P>
Shinde, V.V.,Jeong, Y.T. Pergamon Press ; Elsevier Science Ltd 2016 Tetrahedron letters: the international organ for t Vol.57 No.33
A green and efficient procedure has been developed for the synthesis of densely functionalized tetrahydroindazolo[3,2-b]quinazoline catalyzed by iron fluoride under sonication in solvent-free condition. In comparison to the conventional methods, this efficient green protocol provides remarkable advantages such as good to excellent yields, shorter reaction time, low cost, easy work-up procedure, and bypass for use of solvent and column chromatography. One of the important and interesting advantages of this methodology compared to previous method is that acyclic 1,3-dicarbonyl also gives the desired product which was not possible using the previously reported methodologies.
Shinde, Sambhaji S.,Lee, Chi-Ho,Sami, Abdul,Kim, Dong-Hyung,Lee, Sang-Uck,Lee, Jung-Ho American Chemical Society 2017 ACS NANO Vol.11 No.1
<P>Rational design of efficient and durable bifunctional oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) electrocatalysts is critical for rechargeable metal–air batteries. Here, we developed a facile strategy for fabricating three-dimensional phosphorus and sulfur codoped carbon nitride sponges sandwiched with carbon nanocrystals (P,S-CNS). These materials exhibited high surface area and superior ORR and OER bifunctional catalytic activities than those of Pt/C and RuO<SUB>2</SUB>, respectively, concerning its limiting current density and onset potential. Further, we tested the suitability and durability of P,S-CNS as the oxygen cathode for primary and rechargeable Zn–air batteries. The resulting primary Zn–air battery exhibited a high open-circuit voltage of 1.51 V, a high discharge peak power density of 198 mW cm<SUP>–2</SUP>, a specific capacity of 830 mA h g<SUP>–1</SUP>, and better durability for 210 h after mechanical recharging. An extraordinary small charge–discharge voltage polarization (∼0.80 V at 25 mA cm<SUP>–2</SUP>), superior reversibility, and stability exceeding prolonged charge–discharge cycles have been attained in rechargeable Zn–air batteries with a three-electrode system. The origin of the electrocatalytic activity of P,S-CNS was elucidated by density functional theory analysis for both oxygen reactions. This work stimulates an innovative prospect for the enrichment of rechargeable Zn–air battery viable for commercial applications such as armamentaria, smart electronics, and electric vehicles.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2017/ancac3.2017.11.issue-1/acsnano.6b05914/production/images/medium/nn-2016-05914q_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn6b05914'>ACS Electronic Supporting Info</A></P>