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Keywords:

  • chromium;
  • layered double hydroxides;
  • MO6 octahedron;
  • photochemistry;
  • visible-light response
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Visibly clear: A family of visible-light-responsive MCr–layered double hydroxides (LDHs; M=Cu, Ni, Zn) were synthesized. These show remarkable photocatalytic activity with visible-light irradiation. Experimental and computational studies revealed that the visible-light response of MCr[BOND]NO3–LDHs originates from a d–d transition in the orderly dispersed CrO6 octahedra in the hydrotalcite layer.