Fig. 4From: Solar Hydrogen Production from Cost Effective Stannic Oxide Under Visible Light IrradiationPhotocurrent effect of prepared SnO2-x. a The photocatalytical activities of H2 evolution (b) and O2 evolution (c). The wavelength dependence on photocurrent effect for prepared SnO2-x (d). e The I-T curve for this parpared SnO2-xBack to article page