Fig. 1. Schematic illustration of the charge transfer process within an S-scheme heterojunction. Reprinted with permission from: Ref. [9]. Copyright 2021, Wiley-VCH GmbH.

Fig. 2. (a) Atomic force microscopy image showing the CdS/PT interface in CP2; (b) The line-scanning surface potential from PT to CdS under dark and light conditions. High-resolution ISI-XPS spectra of Cd 3d (c) and S 2p (d) in CdS, CP2, and UV-irradiated CP2. Reprinted with permission from Ref. [9]. Copyright 2021, Wiley‐VCH GmbH.