Fig. 6: Photoelectric and photocatalytic HER performance.

a UV-visible light absorption spectrum of CTF film. b The photocurrent curve. c Photocatalytic HER performance of film on glass in four cycles under visible light (>420 nm). d Images of CTF film loaded on glass. e Image of CTF film loaded on glass for photocatalytic HER. f Schematic diagram of the photocatalytic process.