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Efficient hydrogen generation on CuO core/AgTiO2 shell nano-hetero-structures by photocatalytic splitting of water

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  • Sharma, Shailja
  • Pai, Mrinal R.
  • Kaur, Gurpreet
  • Divya,
  • Satsangi, Vibha R.
  • Dass, Sahab
  • Shrivastav, Rohit

Abstract

Efficient hydrogen generation via photocatalytic splitting of water, using methanol as hole-scavenger, has been recorded using CuO core/AgTiO2 shell nano-hetero-structures. Ag incorporation in TiO2 ranged 1, 3, 5 and 7% at. XRD, SEM and TEM analyses of samples confirmed the dominant evolution of tenorite CuO and anatase TiO2. Average crystallite size was 36, 22 and 33–42 nm for pristine CuO, pristine TiO2 and core/shell samples, respectively. EDX and XPS analyses indicated composition and oxidation states of elements and the existence of Ag in metallic state. Exhibiting absorption in the visible range, diffuse reflectance UV–Visible absorption spectra of core/shell samples resembled closely to that of pristine CuO. Compared to pristine samples, core/shell samples yielded significant gain in hydrogen generation. Sample with 1% Ag-incorporated TiO2 shell recorded most efficient hydrogen generation with yield as high as 180 and 13 μmol g−1 h−1 in laboratory and field conditions, respectively. Plausible reasons for the observed gain in performance are given.

Suggested Citation

  • Sharma, Shailja & Pai, Mrinal R. & Kaur, Gurpreet & Divya, & Satsangi, Vibha R. & Dass, Sahab & Shrivastav, Rohit, 2019. "Efficient hydrogen generation on CuO core/AgTiO2 shell nano-hetero-structures by photocatalytic splitting of water," Renewable Energy, Elsevier, vol. 136(C), pages 1202-1216.
    • Handle: RePEc:eee:renene:v:136:y:2019:i:c:p:1202-1216
    DOI: 10.1016/j.renene.2018.09.091
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    References listed on IDEAS

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    1. Singh, Nirupama & Kumari, Babita & Sharma, Shailja & Chaudhary, Surbhi & Upadhyay, Sumant & Satsangi, Vibha R. & Dass, Sahab & Shrivastav, Rohit, 2014. "Electrodeposition and sol–gel derived nanocrystalline N–ZnO thin films for photoelectrochemical splitting of water: Exploring the role of microstructure," Renewable Energy, Elsevier, vol. 69(C), pages 242-252.
    2. Ni, Meng & Leung, Michael K.H. & Leung, Dennis Y.C. & Sumathy, K., 2007. "A review and recent developments in photocatalytic water-splitting using TiO2 for hydrogen production," Renewable and Sustainable Energy Reviews, Elsevier, vol. 11(3), pages 401-425, April.
    3. Ahmad, H. & Kamarudin, S.K. & Minggu, L.J. & Kassim, M., 2015. "Hydrogen from photo-catalytic water splitting process: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 43(C), pages 599-610.
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    Cited by:

    1. Belessiotis, George V. & Kontos, Athanassios G., 2022. "Plasmonic silver (Ag)-based photocatalysts for H2 production and CO2 conversion: Review, analysis and perspectives," Renewable Energy, Elsevier, vol. 195(C), pages 497-515.
    2. Madriz, Lorean & Tatá, José & Carvajal, David & Núñez, Oswaldo & Scharifker, Benjamín R. & Mostany, Jorge & Borrás, Carlos & Cabrerizo, Franco M. & Vargas, Ronald, 2020. "Photocatalysis and photoelectrochemical glucose oxidation on Bi2WO6: Conditions for the concomitant H2 production," Renewable Energy, Elsevier, vol. 152(C), pages 974-983.
    3. Kaur, Gurpreet & Divya, & Khan, Saif A. & Satsangi, Vibha R. & Dass, Sahab & Shrivastav, Rohit, 2021. "Nano-hetero-structured thin films, ZnO/Ag-(α)Fe2O3, with n/n junction, as efficient photoanode for renewable hydrogen generation via photoelectrochemical water splitting," Renewable Energy, Elsevier, vol. 164(C), pages 156-170.

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