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![Photothermal effect and application of photothermal materials in photocatalysis and photoelectric catalysis](https://image.oaes.cc/17845695-eb5d-49ad-ade6-5641d0a7af0f/microstructures4051.fig.3.jpg)
Figure 3. (A) The dark current density of hematite photoanodes with different temperatures. (B) Onset potential of a hematite photoanode as a function of the illuminated light intensity[68]. Copyright 2016, Stanford University (C) Temperature-dependent band gap energy diagram of a TiO2 photoelectrode[69]. Copyright 2023, Springer Nature.