Ta-substituted SnNb2-xTaxO6 photocatalysts for hydrogen evolution under visible light irradiation

Chan Woo Lee, Hoon Kee Park, Sangbaek Park, Hyun Soo Han, Se Won Seo, Hee Jo Song, Sun Shin, Dong-Wan Kim, Kug Sun Hong

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14 Citations (Scopus)

Abstract

Ta-substituted SnNb2-xTaxO6 was successfully prepared via a solid-state reaction to study the effect of Ta insertion in Nb sites on the crystal structure, photophysical properties, and photocatalytic activities for hydrogen evolution. Analyses of X-ray diffraction patterns and Raman spectra revealed that the substitution of Ta caused not only a more tightly packed atomic structure with greater crystal structural distortion, but also a shorter M-O bond length in MO6 octahedra. Additionally, we observed a gradual increase in the band gap, changing the photoabsorption property and conduction band electronic structure. The SnNb1.4Ta0.6O6 photocatalyst showed enhanced hydrogen evolution compared to pristine SnNb2O6. This result was mainly attributed to better transport ability of the photo-generated charge carriers. This journal is

Original languageEnglish
Pages (from-to)825-831
Number of pages7
JournalJournal of Materials Chemistry A
Volume3
Issue number2
DOIs
Publication statusPublished - 2015 Jan 14

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ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Lee, C. W., Park, H. K., Park, S., Han, H. S., Seo, S. W., Song, H. J., Shin, S., Kim, D-W., & Hong, K. S. (2015). Ta-substituted SnNb2-xTaxO6 photocatalysts for hydrogen evolution under visible light irradiation. Journal of Materials Chemistry A, 3(2), 825-831. https://doi.org/10.1039/c4ta05885b