Fig. 1: Photocatalyst characterization.
From: Enhanced CO evolution for photocatalytic conversion of CO2 by H2O over Ca modified Ga2O3
a X-ray diffractograms; b enlarged X-ray diffractograms at 2θ = 29–31°; c Ca 2p X-ray photoelectron spectroscopy profiles; and d field-emission scanning electron microscopy images of A bare Ga2O3; Ga2O3_Ca_x with a Ca/Ga molar ratio x of B 0.32 mol%, C 0.62 mol%, D 1.1 mol%, E 2.1 mol%, and F 3.3 mol%; G CaGa4O7 (in a, b), and H CaO (in c).
