Enhanced Photoreduction Activity of Carbon Dioxide over Co₃O₄/CeO₂ Catalysts under Visible Light Irradiation

Figure 12

Photoluminescence spectra of CeO₂, 5 wt.% Co₃O₄ and CeO₂ mixture, and 5 wt.% Co₃O₄/CeO₂ and Co₃O₄.