03116nas a2200217 4500008004100000022001400041245014200055210006900197260011000266300001400376490000700390520221200397100002602609700002402635700002702659700002202686700002502708700002002733700002102753856012402774 2011 eng d a1463-926200aEcofriendly hydrogen production from abundant hydrogen sulfide using solar light-driven hierarchical nanostructured ZnIn2S4 photocatalyst0 aEcofriendly hydrogen production from abundant hydrogen sulfide u aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUL a2500-25060 v133 a

It is quite well-known that refineries are producing huge amount of H2S which has been used to produce sulphur and water using the well-known Claus process. This process is not an economically viable process, due to the high-cost chemical process and creates further acute environmental problems. Therefore, we have demonstrated the conversion of poisonous H2S into H-2 using an ecofriendly phocatalysis process which is a green unconventional energy source. We have investigated ecofriendly nanostructured ZnIn2S4 photocatalyst to produce hydrogen from H2S using solar light. We also demonstrate the controlled synthesis of hierarchical nanostructured ZnIn2S4 using a facile hydrothermal method. The morphologies obtained have been greatly influenced by the presence of triethylamine (TEA) with various concentrations during the reaction. Surprisingly, a highly crystalline hexagonal layer structured ZnIn2S4 was obtained instead of cubic spinel. The hierarchical nanostructure, i.e. marigold flower-like morphology, was obtained without any surfactant. The thin and transparent petals self-assembled to form the unique nanostructured marigold flower. The highly crystalline puffy marigold flowers and nanoplates/nanostrips were obtained using TEA-assisted hydrothermal synthesis. Optical study shows the band gap in the range of 2.34-2.48 eV. Considering the band gap in the visible region, ZnIn2S4 is used as photocatalyst for hydrogen production from hydrogen sulphide under solar light which is hitherto unattempted. The constant photocatalytic activity of hydrogen evolution, i.e. 5287 mu mol h(-1), was obtained using such hierarchical nanostructured ZnIn2S4 under visible light irradiation. It is noteworthy that the H-2 evolution rate obtained is much higher compared to earlier reported photocatalysts. Considering the significance of morphologies for photocatalytic application, the formation mechanism has also been furnished. The unique hierarchical nanostructured ZnIn2S4 ternary semiconductor having hexagonal layer will have potential applications in solar cells, LEDs, charge storage, electrochemical recording, thermoelectricity and other prospective electronic and optical devices.

1 aChaudhari, Nilima, S.1 aBhirud, Ashwini, P.1 aSonawane, Ravindra, S.1 aNikam, Latesh, K.1 aWarule, Sambhaji, S.1 aRane, Vilas, H.1 aKale, Bharat, B. uhttps://library.ncl.res.in/content/ecofriendly-hydrogen-production-abundant-hydrogen-sulfide-using-solar-light-driven-002057nas a2200265 4500008004100000022001400041245010400055210006900159260010600228300001200334490000700346520107400353653002501427653002301452653001101475653002201486100002501508700002001533700002601553700002201579700001801601700002501619700002101644856012601665 2011 eng d a0025-540800aNovel solar light driven photocatalyst, zinc indium vanadate for photodegradation of aqueous phenol0 aNovel solar light driven photocatalyst zinc indium vanadate for  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcMAY a635-6380 v463 a

In the present investigation, we have demonstrated the synthesis of novel photocatalyst, zinc indium vanadate (ZIV) by solid solid state route using respective oxides of zinc, indium and vanadium. This novel photocatalyst was characterized using XRD, FESEM, UV-DRS and FTIR in order to investigate its structural, morphological and optical properties. XRD clearly shows the formation of phase pure ZIV of triclinic crystal structure with good crystallinity. FESEM micrographs showed the clustered morphology having particle size between 0.5 and 1 mu m. Since, optical study showed the band gap around 2.8 eV, i.e. in visible region, we have performed the photocatalytic activity of phenol degradation under visible light irradiation. The photodecomposition of phenol by ZIV is studied for the first time and an excellent photocatalytic activity was obtained using this novel photocatalyst. Considering the band gap of zinc indium vanadate in visible region, it will also be the potential candidate for water splitting. (C) 2011 Elsevier Ltd. All rights reserved.

10aCatalytic properties10aChemical synthesis10aOxides10aX-ray diffraction1 aMahapure, Sonali, A.1 aRane, Vilas, H.1 aAmbekar, Jalindar, D.1 aNikam, Latesh, K.1 aMarimuthu, R.1 aKulkarni, Milind, V.1 aKale, Bharat, B. uhttps://library.ncl.res.in/content/novel-solar-light-driven-photocatalyst-zinc-indium-vanadate-photodegradation-aqueous-002180nas a2200205 4500008004100000022001400041245012100055210006900176260011000245300001400355490000700369520134200376100002101718700001801739700001901757700001901776700002201795700002501817856013201842 2011 eng d a0959-942800aSelf assembled CdLa2S4 hexagon flowers, nanoprisms and nanowires: novel photocatalysts for solar hydrogen production0 aSelf assembled CdLa2S4 hexagon flowers nanoprisms and nanowires  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJAN a2624-26310 v213 a

We report here a new ternary chalcogenide material, cadmium lanthanum sulfide (CdLa2S4) produced using a facile hydrothermal method at 433 K. The effect of the solvent on the morphology of the CdLa2S4 was demonstrated for the first time. The prima facie observations revealed the formation of highly crystalline hexagonal structures in the form of flowers in aqueous medium. The flowers comprise hexagonal columns similar to 300 nm in diameter and 1-1.2 mu m in length. All the hexagonal structures have a sharp tip with a cavity of 10 nm and are almost equal in size. The nanoprisms have an average base size of 35 nm with 35 nm edges, and the nanowires have a diameter of 10-15 nm; both were obtained in methanol. Crystal and electronic structure calculations were performed using the Vienna ab initio simulation package (VASP) based on density functional theory (DFT). Considering the band gap of pristine CdLa2S4 in the visible region (2.3 eV), we have demonstrated CdLa2S4 as a photocatalyst for the production of H-2 under solar light. Nanostructured CdLa2S4 prisms gave the maximum hydrogen production, i.e. 2552 mu mol h(-1). Being a stable ternary nanostructured metal sulfide (with nanohexagons, nanoprisms, nanowires), CdLa2S4 may have other potential prospective applications in solar cells and optoelectronic devices.

1 aKale, Bharat, B.1 aBaeg, Jin-Ook1 aKong, Ki-jeong1 aMoon, Sang-Jin1 aNikam, Latesh, K.1 aPatil, Kashinath, R. uhttps://library.ncl.res.in/content/self-assembled-cdla2s4-hexagon-flowers-nanoprisms-and-nanowires-novel-photocatalysts-solar-002161nas a2200193 4500008004100000022001400041245014700055210006900202260011000271300001400381490000700395520131800402100002401720700002601744700002401770700002201794700002101816856013001837 2012 eng d a1463-926200aEco-friendly, highly stable and efficient nanostructured p-type N-doped ZnO photocatalyst for environmentally benign solar hydrogen production0 aEcofriendly highly stable and efficient nanostructured ptype Ndo aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUL a2790-27980 v143 a

We have investigated an economical green route for the synthesis of a p-type N-doped ZnO photocatalyst by a wet chemical method. Significantly, hazardous H2S waste was converted into eco-friendly hydrogen energy using the p-type N-doped ZnO photocatalyst under solar light, which has previously been unattempted. The as-synthesized p-type N-doped ZnO shows a hexagonal wurtzite structure. The optical study shows a drastic shift in the band gap of the doped ZnO in the visible region (3.19-2.3 eV). The doping of nitrogen into the ZnO lattice is conclusively proved from X-ray photoelectron spectroscopy analysis and Raman scattering. The morphological features of the N-doped ZnO are studied from FESEM, TEM and reveal particle sizes to be in the range of similar to 4-5 nm. The N-doped ZnO exhibits enhanced photocatalytic hydrogen generation (similar to 3957 mu mol h(-1)) by photodecomposition of hydrogen sulfide under visible light irradiation, which is much higher as compared to semiconductor metal oxides reported so far. It is noteworthy that a green catalyst is investigated to curtail H2S pollution along with production of hydrogen (green fuel) using solar light, i.e., a renewable energy source. The green process investigated will have the potential to synthesize other N-doped metal oxides.

1 aBhirud, Ashwini, P.1 aSathaye, Shivaram, D.1 aWaichal, Rupali, P.1 aNikam, Latesh, K.1 aKale, Bharat, B. uhttps://library.ncl.res.in/content/eco-friendly-highly-stable-and-efficient-nanostructured-p-type-n-doped-zno-photocatalyst-002334nas a2200229 4500008004100000022001400041245012700055210006900182260011000251300001600361490000600377520140900383100002101792700002401813700002601837700002501863700002201888700002301910700001901933700002101952856013101973 2015 eng d a2050-748800aNanostructured 2D MoS2 honeycomb and hierarchical 3D CdMoS4 marigold nanoflowers for hydrogen production under solar light0 aNanostructured 2D MoS2 honeycomb and hierarchical 3D CdMoS4 mari aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcSEP a21233-212430 v33 a

Unique two dimensional (2D) honeycomb layered MoS2 nanostructures and hierarchical 3D marigold nanoflowers of CdMoS4 were designed using a template free and facile solvothermal method. The MoS2 structure is depicted with a sheet like morphology with lateral dimensions of 5-10 mu m and a thickness of similar to 200 nm and a honeycomb nanostructure architecture produced via the self-assembling of vertically grown thin hexagonal nanosheets with a thickness of 2-3 nm. The 3D CdMoS4 marigold nanoflower architecture comprised thin nanopetals with lateral dimensions of 1-2 mu m and a thickness of a few nm. The CdMoS4 and MoS2 structures displayed hydrogen ( H-2) production rates of 25 445 and 12 555 mu mol h(-1) g(-1), respectively. The apparent quantum yields of hydrogen production were observed to be 35.34% and 17.18% for CdMoS4 and MoS2, respectively. The 3D nanostructured marigold flowers of CdMoS4 and honeycomb like 2D nanostructure of MoS2 were responsible for higher photocatalytic activity due to inhibition of the charge carrier recombination. The prima facie observation of H-2 production showed that the ternary semiconductor confers enhanced photocatalytic activity for H-2 generation due to its unique structure. Such structures can be designed and implemented in other transition metal dichalcogenide based ternary materials for enhanced photocatalytic and other applications.

1 aKadam, Sunil, R.1 aLate, Dattatray, J.1 aPanmand, Rajendra, P.1 aKulkarni, Milind, V.1 aNikam, Latesh, K.1 aGosavi, Suresh, W.1 aPark, Chan, J.1 aKale, Bharat, B. uhttps://library.ncl.res.in/content/nanostructured-2d-mos2-honeycomb-and-hierarchical-3d-cdmos4-marigold-nanoflowers-hydrogen-0