02016nas a2200229 4500008004100000022001400041245014700055210006900202260000900271300001400280490000600294520116500300653001701465653001701482653003001499653002201529653002001551100002901571700003101600700002501631856013001656 2017 eng d a2365-654900aCo-catalytic metal oxide nanoparticles decorated silicon/hematite core shell nanowire arrays as efficient photo electrodes for water splitting0 aCocatalytic metal oxide nanoparticles decorated siliconhematite  cMAR  a2544-25510 v23 a

By looking global energy demands, development of highly efficient stable semiconductor photoelectrodes for photoelectrochemical (PEC) water splitting is highly desirable. Herein, we have fabricated co-catalytic nanoparticles decorated Silicon nanowire (SiNWs)/Hematite(Fe2O3) core sell structures as photo anodes and studied the PEC water oxidation properties. As, Fe2O3 possess weak oxidation kinetics, decoration of NiO and Co3O4 nanoparticles on SiNW/Fe2O3 by hydrothermal method, which acts as co-catalysts to improves the water oxidation reactions. It was found that decoration of Co3O4 nanoparticles enhances the photocurrent up to 2.6 times, whereas for NiO nanoparticles improvement is of 1.5 times when compared to the undecorated electrodes. Along with enhancement of photocurrents, it also shows shift of onset potentials. The effect of the co-catalytic nanoparticles on the enhancement of photocurrent and charge transfer resistance at the interface of electrode-electrolyte have been studied by electrochemical impedance spectroscopy. Further, flat band potentials of the photo electrodes have been measured by using Mott-schottky analysis.

10aCo-catalysts10aphoto anodes10aPhotoelectrochemical cell10asilicon nanowires10awater splitting1 aDevarapalli, Rami, Reddy1 aKamaja, Chaitanya, Krishna1 aShelke, Manjusha, V. uhttp://library.ncl.res.in/content/co-catalytic-metal-oxide-nanoparticles-decorated-siliconhematite-core-shell-nanowire-arrays02329nas a2200277 4500008004100000022001400041245013400055210006900189260000800258300001400266490000700280520140800287653000801695653001401703653001701717653003001734653001501764100002001779700001901799700002001818700002201838700001901860700002001879700002201899856013001921 2021 eng d a2585-729000aEffect of Mn2+ substitution into the hst lattice of ZnO via sol-gel route for boosting the dye-sensitized solar cells performance0 aEffect of Mn2 substitution into the hst lattice of ZnO via solge cAUG a4001-40170 v753 a

In this study, Mn2+ ion is doped in ZnO lattice framework at 1, 3 and 5 wt % by a simple and low-cost sol-gel route to attain improved optoelectronic response. The structural investigation by XRD and Raman analysis explores the formation of hexagonal wurtzite framework with variations in lattice parameters comprising peak intensities favors the Mn doping. The extent of doping was supported by EDS analysis, while XPS confirms doping in + 2 chemical state. The optical investigation by UV-visible and PL provides prominent peaks that also specify peak shifting in order of doping level, while the significant hexagon-shaped nanoparticle (NP) formation was deduced in SEM and TEM micrographs. These proficient ZnO NPs have been deposited on fluorine-doped tin oxide (FTO) conducting glass plate by doctor-blade technique to get photoanodes. The electrical performance of these photoanodes especially photocurrent generation was investigated under standard AM 1.5 one sun illuminations. The highest photoconversion efficiency was attained for 3% Mn-doped ZnO photoanode after xanthene-based organic dye sensitization with output efficiency (eta%) of 0.25% higher than 0.03% of bare ZnO. The comparable ionic radii with exactly half-filled 3d orbital simply overlap with the ZnO valence bond responsible for enhanced overall structural and optical properties that beneficial for DSSCs performance.

10agel10aMixed dye10aMn-doped ZnO10aPhotoelectrochemical cell10aSol&\#82111 aKumbhar, Deepak1 aDelekar, Sagar1 aKumbhar, Sarita1 aDhodamani, Ananta1 aHarale, Namdev1 aNalawade, Rekha1 aNalawade, Avinash uhttp://library.ncl.res.in/content/effect-mn2-substitution-hst-lattice-zno-sol-gel-route-boosting-dye-sensitized-solar-cells-001892nas a2200265 4500008004100000022001400041245013100055210006900186260000800255300001400263490000700277520099000284653001701274653002901291653003001320653001201350100002001362700002001382700002101402700001901423700001901442700002001461700002201481856012301503 2021 eng d a2470-155600aEnhanced photoelectrochemical cell performance of Co doped ZnO nanoparticles sensitized by affordable mixed dyes as sensitizer0 aEnhanced photoelectrochemical cell performance of Co doped ZnO n cSEP a1258-12710 v513 a

In the present investigation, a simple sol-gel approach has been employed for the synthesis of hexagonal wurtzite ZnO nanoparticles (NPs). X-ray diffraction (XRD) rietveld study and Raman analysis reveal the mislaid of the mixed phases of ZnO NPs after doping. The scanning electron micrographs and transmission electron microscopy confirm the formation of hexagonal disk-shaped NPs. FTIR, PL, EDX, XPS validate optical and stoichiometric concentration of Co in ZnO lattice. UV-visible DRS study shows absorption edge with humps to the red region of the spectrum with increasing the absorption strength and shortening of band gap as the content of Co (II) increases. Finally, the prepared samples were coated on the surface of cleaned FTO substrate through a simple doctor blade technique and sensitized with prepared dye. The ZnO photoanode shows 0.036% of efficiency (eta%) while the photoanodes of Co doped samples expose the enhanced efficiencies of 0.29%, 0.389%, 0.089%.

10aCo doped ZnO10amixed dyes as sensitizer10aPhotoelectrochemical cell10asol-gel1 aKumbhar, Deepak1 aKumbhar, Sarita1 aDhodamani, Anant1 aDelekar, Sagar1 aHarale, Namdev1 aNalawade, Rekha1 aNalawade, Avinash uhttp://library.ncl.res.in/content/enhanced-photoelectrochemical-cell-performance-co-doped-zno-nanoparticles-sensitized