fig9

From: Critical advances in charge separation regulation for photocatalytic CO₂ reduction

Critical advances in charge separation regulation for photocatalytic CO<sub>2</sub> reduction

Figure 9. (A) High-resolution XPS Sn 3d spectra of SnS₂-C and SnS₂; (B) High-resolution XPS S 2p spectra of SnS₂-C and SnS₂; (C) Band edge positions and photocatalytic reaction mechanism: Comparative band diagram of SnS₂-C and SnS₂, together with a proposed electron-hole separation of photo-excited electron-hole pairs in SnS₂-C. Figure 9A-C is reprinted from Ref.^[158] under the CC BY 4.0 license. SnS₂-C: Carbon-doped SnS₂; CB: conduction band; VB: valence band; NHE: normal hydrogen electrode; LUMO: lowest unoccupied molecular orbital; HOMO: highest occupied molecular orbital; XPS: X-ray photoelectron spectroscopy.