Fig. 2: Effect of Ta3N5 precursor on the crystallinity of BSTON solid-solution photocatalyst.

a X-ray diffraction (XRD) patterns and b ultraviolet–visible (UV–Vis) diffuse-reflectance spectra for BSTON(TNz) samples prepared using a Ta precursor comprising TaS2/Ta3N5 with varying molar ratios. c Full width at half maximum (FWHM) values of the (110) diffraction peak at 31.06° extracted from the XRD data. Source data for Fig. 2a–c are provided as a Source Data file.