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Keywords:

  • photocatalysis;
  • photonic crystals;
  • inverse opals;
  • visible light activity;
  • Bi2WO6
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The synthesis of Bi2WO6 inverse opal photonic crystals is performed via a facile and economical method. Bi2WO6 inverse opals exhibit much higher photocatalytic activities for the degradation of methylene blue and salicylicic acid under visible light illumination as compared with a reference nanofilm. The photon-to-hydrogen conversion efficiencies of photoelectrochemical water splitting exhibit an almost threefold increase due to the inverse-opal structure.