Fig. 3. Photoelectric features and NIR-photocatalytic hydrogen generation and GSH consumption performances of the SnS_1.68–WO_2.41 nanocatalyst.

UV–VIS–NIR adsorption spectra (a), the plots of (αhν)^1/2 and (αhν)² versus energy (hv) for band gaps of SnS₂ and SnS_1.68–WO_2.41 (b), photocurrent density–voltage (vs. RHE) curves of SnS₂ and SnS_1.68-WO_2.41 under irradiation of 808 nm laser (c), the schematic illustration of the mechanism for NIR-photocatalytic hydrogen generation and GSH consumption (d), NIR-photocatalytic hydrogen generation behavior of the SnS_1.68–WO_2.41 nanocatalyst in the aqueous solution of GSH (10 μM) under irradiation of 808 nm laser at various power densities (e), NIR-photocatalytic GSH consumption behavior of the SnS_1.68–WO_2.41 nanocatalyst under irradiation of 808 nm laser at various power densities (f). The experiments for figures a, e, f was repeated three times independently with similar results.