Fig. 12

a Photocatalytic H2-evolution in UV-visible light irradiation b Photocatalytic activity in 8 h; c Average H2 evolution in an hour for the prepared catalysts; d Stability test of CoF3 sample.
a Photocatalytic H2-evolution in UV-visible light irradiation b Photocatalytic activity in 8 h; c Average H2 evolution in an hour for the prepared catalysts; d Stability test of CoF3 sample.