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Suryawanshi, M.P.,Shin, S.W.,Ghorpade, U.V.,Gurav, K.V.,Agawane, G.L.,Hong, C.W.,Yun, J.H.,Patil, P.S.,Kim, J.H.,Moholkar, A.V. Association for Applied Solar Energy ; Elsevier Sc 2014 SOLAR ENERGY -PHOENIX ARIZONA THEN NEW YORK- Vol.110 No.-
A cost-effective chemical approach is developed for the synthesis of photoelectrochemically active Cu<SUB>2</SUB>ZnSnS<SUB>4</SUB> (CZTS) thin films. More specifically, CZTS precursor thin films are prepared by the sequential deposition of Cu<SUB>2</SUB>SnS<SUB>3</SUB> and ZnS layers using a successive ionic adsorption and reaction (SILAR) technique. The CZTS precursor thin films are sulfurized at different temperatures ranging from 500 to 575<SUP>o</SUP>C at intervals of 25<SUP>o</SUP>C. The influence of different sulfurization temperatures on the structural, compositional, morphological, and optical properties, as well as on the photoelectrochemical performance is studied. The films sulfurized at 575<SUP>o</SUP>C showed a prominent kesterite phase with a nearly stoichiometric composition, dense microstructure with the desired thickness, and an optical band gap energy of 1.47eV. The photoelectrochemical (PEC) cell fabricated using CZTS thin film sulfurized at 575<SUP>o</SUP>C showed the highest short circuit current density (J<SUB>sc</SUB>) of 8.27mA/cm<SUP>2</SUP> with a power conversion efficiency (η) of 1.06%.
Patil, U.M.,Sohn, J.S.,Kulkarni, S.B.,Park, H.G.,Jung, Y.,Gurav, K.V.,Kim, J.H.,Jun, S.C. North-Holland 2014 Materials letters Vol.119 No.-
Prominence of current work mainly conveys synthesis of α-MnO<SUB>2</SUB> nanofibers on 3D-graphene foam (GF) by solution growth (SG) method and its proficient influence in electrochemical supercapacitors' performance. The α-MnO<SUB>2</SUB> nanofibers are synthesized on graphene surface by using MnSO<SUB>4</SUB> and ammonium persulfate as an oxidant. The results show formation of aggregated bundles (size about 15-30nm) of 1D α-MnO<SUB>2</SUB> nanofibers on the graphene surface. In supercapacitor, the unique nanofibrous morphology of MnO<SUB>2</SUB> on 3D GF electrode exhibits higher specific capacitance (670Fg<SUP>-1</SUP>) than on the conventional current collector (CC) electrode (440Fg<SUP>-1</SUP>).
Patil, C.E.,Tarwal, N.L.,Jadhav, P.R.,Shinde, P.S.,Deshmukh, H.P.,Karanjkar, M.M.,Moholkar, A.V.,Gang, M.G.,Kim, J.H.,Patil, P.S. Elsevier 2014 Current Applied Physics Vol.14 No.3
Vanadium pentoxide (V<SUB>2</SUB>O<SUB>5</SUB>) mixed tungsten trioxide (WO<SUB>3</SUB>) thin films have been synthesized by a novel pulsed spray pyrolysis technique (PSPT) on glass and fluorine doped tin oxide (FTO) coated glass substrates at 400 <SUP>o</SUP>C. Aqueous solutions of equimolar vanadium chloride and ammonium tungstate were mixed in volume proportions (5%, 10% and 15%) for the deposition of V<SUB>2</SUB>O<SUB>5</SUB>-WO<SUB>3</SUB> thin films. The structural, morphological, optical and electrochemical properties of V<SUB>2</SUB>O<SUB>5</SUB>-WO<SUB>3</SUB> thin films were investigated by FT-IR, XRD, SEM, cyclic voltammetry, chronoamperometry and chronocoulometry techniques. The results showed that the electrochemical properties of V<SUB>2</SUB>O<SUB>5</SUB> were altered by mixing WO<SUB>3</SUB>. All the films exhibited cathodic electrochromism in lithium containing electrolyte (0.5 M LiClO<SUB>4</SUB> + propylene carbonate (PC)). Maximum coloration efficiency (CE) of about 49 cm<SUP>2</SUP> C<SUP>-1</SUP> was observed for the V<SUB>2</SUB>O<SUB>5</SUB> film mixed with 15% WO<SUB>3</SUB>. The electrochemical stability of the sample was examined and it was found to be stable up to 1000 cycles.
Electrochemical supercapacitor properties of highly porous sponge-like selenium thin films
Patil, A.M.,Lokhande, A.C.,Chodankar, N.R.,Kim, J.H.,Lokhande, C.D. Pergamon Press ; Elsevier Science Ltd 2016 International journal of hydrogen energy Vol.41 No.39
<P>The porous nanostructured material is a prime requirement of energy storage devices, as it contributes maximum surface area for charge storage. In present paper, a simple and cost effective electrodeposition route has been adopted to prepare highly porous sponge-like selenium thin films. The selenium surface displays porous nanostructure with specific surface area of 35.9 m(2) g(-1) and suitable pore size, providing auspicious trails for transportation as well as penetration of electrolyte ions. The structural study confirms the formation of trigonal structure. The electrochemical properties of selenium films are reported. The film exhibits maximum specific capacitance (C-s) of 29.25 g(-1) at 5 mV s(-1) scan rate in 1 M Na2SO4 electrolyte along with electrochemical stability of 91% after 1000 cyclic voltammetry (CV) cycles. This investigation implies that selenium thin films in composite form may be useful for charge storage applications. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.</P>
Patil, Umakant M.,Sohn, Ji Soo,Kulkarni, Sachin B.,Lee, Su Chan,Park, Hyung Goo,Gurav, Kishor V.,Kim, J.H.,Jun, Seong Chan American Chemical Society 2014 ACS APPLIED MATERIALS & INTERFACES Vol.6 No.4
<P>Chemical growth of mixed cobalt–nickel hydroxides (Co<SUB><I>x</I></SUB>Ni<SUB>1–<I>x</I></SUB>(OH)<SUB>2</SUB>), decorated on graphene foam (GF) with desirable three-dimensional (3D) interconnected porous structure as electrode and its potential energy storage application is discussed. The nanostructured Co<SUB><I>x</I></SUB>Ni<SUB>1–<I>x</I></SUB>(OH)<SUB>2</SUB> films with different Ni:Co (<I>x</I>) compositions on GF are prepared by using the chemical bath deposition (CBD) method. The structural studies (X-ray diffraction and X-ray photoelectron spectroscopy) of electrodes confirm crystalline nature of Co<SUB><I>x</I></SUB>Ni<SUB>1–<I>x</I></SUB>(OH)<SUB>2</SUB>/GF and crystal structure consists of Ni(OH)<SUB>2</SUB> and Co(OH)<SUB>2</SUB>. The morphological properties reveal that nanorods of Co(OH)<SUB>2</SUB> reduce in size with increases in nickel content and are converted into Ni(OH)<SUB>2</SUB> nanoparticles. The electrochemical performance reveals that the Co<SUB>0.66</SUB>Ni<SUB>0.33</SUB>(OH)<SUB>2</SUB>/GF electrode has maximum specific capacitance of ∼1847 F g<SUP>–1</SUP> in 1 M KOH within a potential window 0 to 0.5 V vs Ag/AgCl at a discharge current density of 5 A g<SUP>–1</SUP>. The superior pseudoelectrochemical properties of cobalt and nickel are combined and synergistically reinforced with high surface area offered by a conducting, porous 3D graphene framework, which stimulates effective utilization of redox characteristics and communally improves electrochemical performance with charge transport and storage.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2014/aamick.2014.6.issue-4/am404863z/production/images/medium/am-2013-04863z_0010.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/am404863z'>ACS Electronic Supporting Info</A></P>
Patil, S.S.,Patil, D.R.,Apte, S.K.,Kulkarni, M.V.,Ambekar, J.D.,Park, C.J.,Gosavi, S.W.,Kolekar, S.S.,Kale, B.B. Elsevier 2016 Applied Catalysis B Vol.190 No.-
<P>Ag3PO4 is a good photocatalyst but ubiquitously known for its photocorrosion problem during photocatalytic reaction. Therefore, stabilization of Ag3PO4 with retaining its fundamental properties has immense importance. With this motivation, we designed Ag3PO4 glass nanocomposite to resolve the problem of photocorrosion. Moreover, the effect of size quantization on photocatalytic activity has also been demonstrated by growing the cubic Ag3PO4 nanoparticles with size in the range of 3-9 nm in glass matrix via melt and quenching method. The band gap of Ag3PO4 has been tuned (2.56-2.25 eV) in glass matrix with respect to size. Considering the size tunable band gap of Ag3PO4 glass nanocomposite within visible region, it is demonstrated as a photocatalyst for hydrogen (H-2) production from copious hazardous waste H2S. The utmost H-2 production i.e. 3920.4 mu mol h(-1) g(-1) is obtained using 1 gm of Ag3PO4 glass nanocomposite powder. The apparent quantum yield for H-2 production is calculated to be 5.51% for Ag3PO4 glass nanocomposite. Interestingly, presence of plasmonic Ag was also observed in Ag3PO4 glass nanocomposite which contributes for H-2 production through enhanced light absorption, efficient charge separation and improved stability. Recycling study of sample reveals stable H-2 production efficiency and good stability of the photocatalyst. Surprisingly, catalyst can be reused many times and recovery of catalyst is possible just rinsing with distilled water. All these results demonstrate directly the feasibility of designing a new generation photocatalysts. (C) 2016 Published by Elsevier B.V.</P>
Kim, J.H.,Hossain, F.M.A.,Patil, A.M.,Choi, J.Y.,Kim, S.B.,Uyangaa, E.,Park, S.Y.,Lee, J.H.,Kim, B.,Kim, K.,Eo, S.K. Pergamon Press 2016 Comparative immunology, microbiology and infectiou Vol.48 No.-
<P>Japanese encephalitis (JE), characterized by extensive neuroinflammation following infection with neurotropic JE virus (JEV), is becoming a leading cause of viral encephalitis due to rapid changes in climate and demography. The blood-brain barrier (BBB) plays an important role in restricting neuroinvasion of peripheral leukocytes and virus, thereby regulating the progression of viral encephalitis. In this study, we explored the role of CD11 c(hi) dendritic cells (DCs) in regulating BBB integrity and JE progression using a conditional depletion model of CD11 c(hi) DCs. Transient ablation of CD11 c(hi) DCs resulted in markedly increased susceptibility to JE progression along with highly increased neuro-invasion of JEV. In addition, exacerbated JE progression in CD11chi DC-ablated hosts was closely associated with increased expression of proinflammatory cytokines (IFN-beta, IL-6, and TNF-alpha) and CC chemokines (CCL2, CCL3, CXCL2) in the brain. Moreover, our results revealed that the exacerbation of JE progression in CD11 c(hi) DC-ablated hosts was correlated with enhanced BBB permeability and reduced expression of tight junction and adhesion molecules (claudin-5, ZO-1, occluding, JAMS). Ultimately, our data conclude that the ablation of CD11 c(hi) DCs provided a subsidiary impact on BBB integrity and the expression of tight junction/adhesion molecules, thereby leading to exacerbated JE progression. These findings provide insight into the secondary role of CD11 c(hi) DCs in JE progression through regulation of BBB integrity and the expression of tight junction/adhesion molecules. (C) 2016 Elsevier Ltd. All rights reserved.</P>
Gunjakar, J.L.,Jo, Y.K.,Kim, I.Y.,Lee, J.M.,Patil, S.B.,Pyun, Jae.Chul.,Hwang, S.J. Academic Press 2016 Journal of solid state chemistry Vol.240 No.-
<P>A facile, economic, and reproducible chemical bath deposition (CBD) method is developed for the fabrication of facet-controlled Ag3PO4 thin films with enhanced visible light photocatalytic activity. The fine control of bath temperature, precursor, complexing agent, substrate, and solution pH is fairly crucial in preparing the facet-selective thin film of Ag3PO4 nanocrystal. The change of precursor from silver nitrate to silver acetate makes possible the tailoring of the crystal shape of Ag3PO4 from cube to rhombic dodecahedron and also the bandgap tuning of the deposited films. The control of [Ag+]/[phosphate] ratio enables to maximize the loading amount of Ag3PO4 crystals per the unit area of the deposited film. All the fabricated Ag3PO4 thin films show high photocatalytic activity for visible light-induced degradation of organic molecules, which can be optimized by tailoring the crystal shape of the deposited crystals. This CBD method is also useful in preparing the facet-controlled hybrid film of Ag3PO4-ZnO photocatalyst. The present study clearly demonstrates the usefulness of the present CBD method for fabricating facet controlled thin films of metal oxosalt and its nanohybrid. (C) 2016 Published by Elsevier Inc.</P>
A Survey on Ontology based Web Usage Mining
Vandana M. Patil,J. B. Patil 보안공학연구지원센터 2016 International Journal of Database Theory and Appli Vol.9 No.12
The exponential increase in information, users and number of Websites on WWW has given rise to number of challenges. The most important challenge is the effective and systematic management of this massive Web data. For Web users, it is very difficult to access relevant information quickly and efficiently. And for Web site owners, it is very difficult to satisfy their users’ information needs effectively. Web Usage Mining has been used to deal with aforesaid issues. The Web Usage Mining techniques are solely based on knowledge acquired through the analysis of the users’ navigational behavior. Hence, quality of discovered patterns is low. Recent studies show that, semantically enriched Web Usage Mining enhances the quality of discovered patterns. The semantically enriched Web is called as Semantic Web, and this new form of Web Usage mining is called as Semantic Web Usage Mining. It is also called as Ontology based Web Usage Mining, as Ontologies act as backbone for conceptual description of semantic knowledge in Semantic Web. In this paper, we have presented brief overview of conventional Web usage mining and performed an extensive survey of research work done in ontology based web usage mining.