Fig. 1. (a) Scheme of the Self-cycled photo Fenton-like system with recycled Mn species. (b) EPR response of Mn species: (1) Mn(II) signal in the initial 2 min under AM 1.5 illumination; (2) Mn2+/Mn4+ signals in the initial 10 min under AM 1.5 illumination; (3) Mn2+/Mn4+ signals after 5 min since the light off; (4) Mn2+/Mn4+ signals after 5 min since the light reopened. Reprinted with permission from ref [9]. Copyright 2022 Springer Nature.

Fig. 2. Photographs of the 7 × 10 cm2 SnO2?x/BiVO4/WO3 photoanode and PTFE@Mo-SACs/mrG-GDE for degrading 200 mL synthetic wastewater containing a mixture of 5 ppm rhodamine B, 5 ppm methylene blue and 5 ppm NP with the input of only oxygen and sunlight. Reprinted with permission from ref [9]. Copyright 2022 Springer Nature.