Research / 2022 / Article / Fig 4

Research Article

Direct Electron Transfer from Upconversion Graphene Quantum Dots to TiO2 Enabling Infrared Light-Driven Overall Water Splitting

Figure 4

Electron transfer from r-GQDs to TiO2 investigated by (a–c) in situ XPS, (d) in situ FT-IR, and (e) in situ Raman measurements. (f) Illustration of the electron transfer process in TiO2/r-GQDs.