Figure 4.
Photocatalytic O2 evolution from AgNO3 solution with Gd2FeSbO7, Gd2InSbO7 or Gd2YSbO7 as catalyst under visible light irradiation (λ > 420 nm, 0.5 g photocatalyst, 1 mmol AgNO3, 270 mL pure water). Light source: 300 W Xe lamp.
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