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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, Dipak V.,Pyeon, Limok,Pei, Mingyuan,Kim, Guan-Woo,Yang, Hoichang,Park, Taiho American Chemical Society 2017 ACS APPLIED MATERIALS & INTERFACES Vol.9 No.16
<P>We investigate the stability of an active organometallic perovskite layer prepared from a two-step solution procedure, including spin coating of aqueous lead nitrate (Pb(NO3)(2)) as a Pb2+ source and sequential dipping into a methylammonium iodide (CH3NH3I) solution. The conversion of CH3NH3PbI3 from a uniform Pb(NO3)2 layer generates PbI2-free and large-grain perovskite crystallites owing to an intermediate ion exchange reaction step, resulting in improved humidity resistance and, thereby, improved long-term stability with 93% of the initial power conversion efficiency (PCE) after a period of 20 days. The conventional fast-converted PbI2-dimethylformamide solution system leaves small amounts of intrinsic PbI2 residue on the resulting perovskite and MAPbI(3) crystallites with uncontrollable sizes. This accelerates the generation of PbI2 and the decomposition of the perovskite layer, resulting in poor stability with less than 60% of the initial PCE after a period of 20 days.</P>
Shinde, V.V.,Jeong, D.,Joo, S.W.,Cho, E.,Jung, S. Elsevier 2018 CATALYSIS COMMUNICATIONS - Vol.103 No.-
We report here the synthesis of mono-6-deoxy-6-aminopropylamino-β-cyclodextrin (Pr-β-CD) as a supramolecular organic base catalyst. Pr-β-CD was characterized by FT-IR, NMR, MALDI-TOF mass spectrometry and SEM analysis. Using this Pr-β-CD, biologically important indolyl 1H-pyrrole derivatives were synthesized with good to excellent yields in an aqueous medium via one-pot four-component reaction. Furthermore, the catalytic mechanism was elucidated in detail by using 2D NMR (ROESY), FE-SEM and FT-IR studies. The credit of the presented protocol includes the use of novel efficacious, reusable eco-friendly supramolecular carbohydrate catalyst, and precludes the use of organic solvents and column chromatography.
Shinde, N. M.,Xia, Qi Xun,Yun, Je Moon,Singh, Saurabh,Mane, Rajaram S.,Kim, Kwang-Ho Royal Society of Chemistry 2017 Dalton Transactions Vol. No.
<▼1><P>The synthesis and asymmetric supercapacitor application of a bismuth oxide (Bi2O3) electrode consisting of arranged nano-platelets for evolving a flower-type surface appearance on nickel-foam (Bi2O3–Ni–F) are described.</P></▼1><▼2><P>The present study involves the synthesis of a bismuth oxide (Bi2O3) electrode consisting of an arranged nano-platelets for evolving a flower-type surface appearance on nickel-foam (Bi2O3–Ni–F) by a simple, inexpensive, binder-free and one-step chemical bath deposition (CBD) method, popularly known as a wet chemical method. The as-prepared Bi2O3 on Ni-foam, as an electrode material, demonstrates 557 F g<SUP>−1</SUP> specific capacitance (SC, at 1 mA cm<SUP>−2</SUP>), of which 85% is retained even after 2000 cycles. With specific power density of 500 kW kg<SUP>−1</SUP>, the Bi2O3–Ni–F electrode documents a specific energy density of 80 Wh kg<SUP>−1</SUP>. Furthermore, a portable asymmetric supercapacitor device, <I>i.e.</I> a pencil-type cell consisting of Bi2O3–Ni–F as an anode and graphite as a cathode in 6 M KOH aqueous electrolyte solution, confirms 11 Wh kg<SUP>−1</SUP> and 720 kW kg<SUP>−1</SUP> specific energy and specific power densities, respectively. An easy and a simple synthesis approach for manufacturing a portable laboratory scale pencil-type supercapacitor device is a major outcome of this study, which can also be applied for ternary and quaternary metal oxides for recording an enhanced performance. In addition, we presented a demonstration of lighting a light emitting diode (LED) using a home-made pencil-type supercapacitor device which, finally, has confirmed the scaling and technical potentiality of Bi2O3–Ni–F in energy storage devices.</P></▼2>
Shinde, Nanasaheb M.,Xia, Qi Xun,Yun, Je Moon,Shinde, Pritamkumar V.,Shaikh, Shoyebmohamad M.,Sahoo, Rakesh K.,Mathur, Sanjay,Mane, Rajaram S.,Kim, Kwang Ho Elsevier 2019 ELECTROCHIMICA ACTA Vol.296 No.-
<P><B>Abstract</B></P> <P>Polycrystalline and mesoporous bismuth oxide (Bi<SUB>2</SUB>O<SUB>3</SUB>) micro-sponge-balls of 4–7 μm in diameter comprising of 58–65 (±2) nm upright standing petals, separated by 100–700 (±50) nm crevices, are synthesized directly onto 3D Ni-foam at room-temperature (27 °C) using Tritonx-100 surfactant-mediated soft wet chemical method. After knowing the phase purity, surface area, pore-size distribution, micro-sponge-ball-type surface morphology, elemental analysis and binding energy confirmations of Bi<SUB>2</SUB>O<SUB>3</SUB>, a material with quasi-faradaic redox reactions responsible for supercapattery type behavior, are measured and explored. At a low scan rate, the specific capacitance of Bi<SUB>2</SUB>O<SUB>3</SUB> sponge-ball electrode, measured from 0.4 to 1.80 A g<SUP>−1</SUP> current density, decreases from 559 to 211 F g<SUP>−1</SUP> which is equivalent to a capacity from 155 to 58 mAh.g<SUP>−1</SUP>. An asymmetric supercapacitor (ASC) device assembly of Bi<SUB>2</SUB>O<SUB>3</SUB> sponge-ball electrode with graphite i.e. Bi<SUB>2</SUB>O<SUB>3</SUB>//graphite demonstrates excellent electrochemical properties with 8 Wh kg<SUP>−1</SUP> energy density at 2040 W kg<SUP>−1</SUP> power density, and about 80% cycling retention over 5000 redox cycle operations. A demonstration of LED with full-bright intensity during discharge process of the Bi<SUB>2</SUB>O<SUB>3</SUB>//graphite ASC device suggests its practical potentiality and industrial viability.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Shinde, V. R.,Shim, H.-S.,Gujar, T. P.,Kim, H. J.,Kim, W. B. WILEY-VCH Verlag 2008 Advanced Materials Vol.20 No.5
<B>Graphic Abstract</B> <P>The controlled precipitation of a supersaturated Cd<SUP>2+</SUP> solution is used to selectively deposit Cd(OH)<SUB>2</SUB> nanowire bundles on a substrate. As schematically depicted in the figure, when the Cd<SUP>2+</SUP> ionic product exceeds the solubility product, heterogeneous and homogeneous nucleation occur independently on the substrate and in the solution to give nanowire bundles and hexagonal plates, respectively. <img src='wiley_img/09359648-2008-20-5-ADMA200701828-content.gif' alt='wiley_img/09359648-2008-20-5-ADMA200701828-content'> </P>
Platinum-Catalyzed Hydrogenative Cyclization of Yne-Enones, Yne-Aldehydes, and Yne-Dienes
Shinde, Mahadev P.,Wang, Xi,Kang, Eun Joo,Jang, Hye-Young WILEY-VCH Verlag 2009 EUROPEAN JOURNAL OF ORGANIC CHEMISTRY Vol.2009 No.35
<P>Pt complexes were used in the presence of phosphane ligands, SnCl<SUB>2</SUB>, and H<SUB>2</SUB> for coupling reactions of alkynes with electrophiles under environmentally benign hydrogenation conditions, providing five- and six-membered cycloreduction products in moderate to good yield. Deuterium labeling studies suggested the occurrence of a catalytic cycle including the diploar intermediate derived from hydrometalation of a platinum–hydride complex to the alkyne. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)</P> <B>Graphic Abstract</B> <P>Using Pt<SUP>II</SUP> complexes and hydrogen, the reductive cyclizations of yne-enones, yne-aldehydes, and yne-dienes were conducted, which showed expanded reactivity of the Pt–alkyne complex with various electrophiles. <img src='wiley_img/1434193X-2009-2009-35-EJOC200901005-fig000.gif' alt='wiley_img/1434193X-2009-2009-35-EJOC200901005-fig000'> </P>
Shinde, Pravin S.,Lee, Su Yong,Ryu, Jungho,Choi, Sun Hee,Jang, Jum Suk unknown 2017 Chemical communications Vol. No.
<P>We report internally porous Au-embedded hematite on FTO using CTAB. Incorporation of Au and CTAB synergistically improved the photocurrent of hematite by 63% at 1.23 V-RHE in 1 M NaOH under standard illumination conditions. The performance enhancement is due to the increased donor density and optical properties of internally porous networks and plasmonic absorption of hematite.</P>