Synthesis of Cu2PO4OH hierarchical superstructures with photocatalytic activity in visible light

In Sun Cho, Dong Wook Kim, Sangwook Lee, Chae Hyun Kwak, Shin Tae Bae, Jun Hong Noh, Sung Hun Yoon, Hyun Suk Jung, Dong Wan Kim, Kug Sun Hong

Research output: Contribution to journalArticle

127 Citations (Scopus)

Abstract

Using a wet-chemical method and without any surfactants or templates, various 3D hierarchical superstructures of Cu2PO4OH were synthesized by simply adjusting the pH. The resulting hierarchical superstructures were characterized using X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), high resolution-TEM (HRTEM), Fourier transform infrared spectroscopy (FTIR), Raman, and UV-Vis spectroscopy. With an increase in pH from 2.5 to 7.0, the morphology of Cu2PO4OH varied from microrods to walnut-shaped microspheres of self-assembled nanoparticles. A possible mechanism for the formation of the Cu 2PO4OH hierarchical superstructures was also proposed. The optical properties of the Cu2PO4OH hierarchical superstructures were strongly related to their morphologies and the size of the assembled crystallites. We further demonstrated the useful photocatalytic activity of these complex structures in the degradation of methylene blue (MB) dye under visible light irradiation (λ > 410 nm). The best photocatalytic performance was achieved by Cu2PO4OH with a walnut-shaped morphology due to the excellent absorption of visible light as well as a high BET surface area.

Original languageEnglish
Pages (from-to)2154-2162
Number of pages9
JournalAdvanced Functional Materials
Volume18
Issue number15
DOIs
Publication statusPublished - 2008 Aug 11
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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