Fig. 1: Morphology, structure, and absorption spectroscopy of Y2Ti2O5S2 photocatalyst.

a SEM image. b XRD pattern (red: measured, black: simulated). c Diffuse reflectance spectrum with estimated band-gap energy of 1.9 eV. d Absorption coefficient \({\alpha }_{{{{{{\rm{abs}}}}}}}\,\) from DFT/HSE06 calculations. e TDR spectra at pump fluence intensity \({P}_{{{{{{\rm{FL}}}}}}}=3\,{{\upmu }}{{{{{\rm{J}}}}}}\). f TDR kinetics at probe photon energy of 0.24 eV. Source data are provided as a Source Data file.