http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Shinde, Pravin V.,Shingate, Bapurao B.,Shingare, Murlidhar S. Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.4
In the present work, successful implementation of ultrasound irradiations for the rapid synthesis of 1,5-benzodiazepine derivatives under solvent-free conditions is demonstrated. Use of a novel catalyst i.e. camphor sulphonic acid in combination with ultrasound technique is reported for the first time. Comparative study for the synthesis of 1,5-benzodiazepines using conventional as well as ultrasonication method is discussed.
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>
Shinde, Pravin S.,Go, Geun Ho,Lee, Won Jae The Royal Society of Chemistry 2012 Journal of materials chemistry Vol.22 No.21
<P>Nanocrystalline hematite (α-Fe<SUB>2</SUB>O<SUB>3</SUB>) film was prepared on FTO using pulse reverse electrodeposition with hierarchical nano-petal structures (∼30 to 35 nm) that appear to protrude out from the agglomerated network. Photocurrent density of nano-petal morphology measured at <I>E</I> = 1.23 V <I>vs.</I> RHE in 1 M NaOH under 1 sun illumination was remarkably increased by 180% relative to that of Fe<SUB>2</SUB>O<SUB>3</SUB> film produced by normal electrodeposition.</P> <P>Graphic Abstract</P><P>Nanocrystalline hematite (α-Fe<SUB>2</SUB>O<SUB>3</SUB>) film was prepared on FTO using pulse reverse electrodeposition with hierarchical nano-petal structures (∼30 to 35 nm) that appear to protrude out from the agglomerated network. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2jm31254a'> </P>
Shinde, Pravin V.,Shingate, Bapurao B.,Shingare, Murlidhar S. Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.2
In the present work, catalytic activity of basic alumina in water has been demonstrated for the synthesis of poly functionalized pyridines. This strategy has some remarkable advantages, such as use of heterogeneous catalyst in aqueous media, reusability of catalyst and scalable approach.
Shinde, Pravin S.,Annamalai, Alagappan,Kim, Jae Young,Choi, Sun Hee,Lee, Jae Sung,Jang, Jum Suk American Chemical Society 2015 The Journal of Physical Chemistry Part C Vol.119 No.10
<P>High:quality hematite (alpha-Fe2O3) photoanodes were syritheSized from a sulfate electrolyte bath by the pulse reverse electrodeposition (PRED) method. The influence of PRED parameters (viz, duty cycle, pulse period, and deposition time) was systematically investigated on the structural, optical, morphological, and photo electrochemical properties of the films. The optimized parameters of pulse duty cycle, pulse:period, and the deposition time were 20%, 10 ms, and 45 s, respectively. The granular and compact nanocrystalline morphology of the alpha-Fe2O3 was found to alter according to the process parameters. The alpha-Fe2O3 electrodes (film thickness similar to 200 nm) prepared by annealing at 550 degrees C for 4 h followed by 800 degrees C for 15 min exhibited an optimum photocurrent density of 504 mu A cm(-2) measured at 1.23 V vs RHE in 1 M NaOH electrolyte under 100 mW cm(-2) light illumination.</P>
Pravin V. Shinde,Bapurao B. Shingate,Murlidhar S. Shingare 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.4
In the present work, successful implementation of ultrasound irradiations for the rapid synthesis of 1,5-benzodiazepine derivatives under solvent-free conditions is demonstrated. Use of a novel catalyst i.e. camphor sulphonic acid in combination with ultrasound technique is reported for the first time. Comparative study for the synthesis of 1,5-benzodiazepines using conventional as well as ultrasonication method is discussed.
Shinde, Pravin S.,Choi, Sun Hee,Kim, Yongsam,Ryu, Jungho,Jang, Jum Suk The Royal Society of Chemistry 2016 Physical Chemistry Chemical Physics Vol.18 No.4
<P>The onset potential is an important parameter that affects the water oxidation performance of photoanodes. Herein, we investigated the behavior of the photocurrent onset potential of hematite (alpha-Fe2O3) photoanodes by incorporating Sn4+ cations via external (surface overlayer) or self (underlying FTO substrate) doping. The alpha-Fe2O3/FTO photoanodes fabricated at both low (550 degrees C) and high (800 degrees C) temperatures were chosen for surface Sn4+ doping (0-10 mM SnCl4). At the lower temperature, Sn4+ doping enriched the conductivity of alpha-Fe2O3/FTO, thereby improving the photocurrent response at higher applied potentials. In addition, the surface incorporation of Sn4+ shifted the onset of the water oxidation reaction in the positive direction. In the case of high temperature-annealed photoanodes, Sn leaching (resulting from FTO deformation) also affected the water oxidation performance of the photoanodes. This was caused by the loss of FTO conductivity as well as by the unfavourable surface properties due to the excessive incorporation of Sn ions (SnOx) into the hematite matrix. The anodic shift of the onset potential in both cases was due to the decreased surface state capacitance, as revealed by electrochemical impedance spectroscopy (EIS). The different annealing conditions, where lattice distortion and deformation-directed Sn diffusion-doping occur, were also found to affect the surface states associated with hematite and its water oxidation onset potential. Crystallographic analyses made by synchrotron XRD further support the results obtained from the EIS study. Sn doping was found to be concurrent with the respective changes in the (104) and (110) planes of hematite, which are associated with the onset potential-driving surface states and the photocurrent-boosting electron mobility, respectively.</P>
Shinde, Pravin S.,Mahadik, Mahadeo A.,Lee, Su Yong,Ryu, Jungho,Choi, Sun Hee,Jang, Jum Suk Elsevier 2017 CHEMICAL ENGINEERING JOURNAL -LAUSANNE- Vol.320 No.-
<P><B>Abstract</B></P> <P>Controlling the morphology of semiconductors at the nanoscale level is the key for efficient photoelectrochemical (PEC) water splitting systems. Herein, we report for the first time the fabrication of porous hematite nanoball array film on conducting FTO via a facile pulse reverse electrodeposition method using cetyltrimethylammonium bromide (CTAB) surfactant and a TiO<SUB>2</SUB> underlayer (UL) on FTO. A prolonged low-temperature-annealing treatment is employed to convert iron into hematite (α-Fe<SUB>2</SUB>O<SUB>3</SUB>) and to remove the surfactant molecules gradually. Annihilation of surfactant molecules led to the creation of pores during crystallization of hematite nanoballs, thereby providing low-resistant diffusion pathways for the migration and incorporation of cations (Ti<SUP>4+</SUP> from UL and Sn<SUP>4+</SUP> from FTO) in hematite. The hematite photoanode with porous nanoball array exhibited significantly higher PEC performance than the flat hematite due to sixfold enrichment in the donor density, improved charge-transfer properties, and higher light absorption. The enhancement in photocurrent and water oxidation performance of porous hematite photoanode is also feasible when coupled with well-known Co and CoPi catalysts. Thus, our new approach allowed the simple fabrication of hematite films with nanoporous architecture for enabling high photon harvesting and maximized interfacial charge transfer to facilitate water oxidation reaction.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We report porous hematite nanoball array on FTO using CTAB and TiO<SUB>2</SUB> underlayer (UL) on FTO. </LI> <LI> CTAB and TiO<SUB>2</SUB> UL synergistically helped form porous nanoball array film of hematite. </LI> <LI> Porous nanoball array showed sixfold increase in donor density compared to planar hematite. </LI> <LI> Advance in water oxidation was due to improved charge-transfer and light absorption. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>