Table 6.
The activation of O2 by photoelectro-Fenton process and photoelectrocatalytic process.
| Cathodes | Anodes | Contaminants | Reaction conditions | O2 supply | ROS | Removal efficiency | TOC removal | Reference |
|---|---|---|---|---|---|---|---|---|
| Carbon felt | Pt | CIP | [CIP]0 = 50.0 mg L−1, pH = 3.0, Na2SO4 = 50.0 μM, 300 W xenon lamp | O2 aeration | H2O2, •O2−, •OH | 100.0% | 80.3% | [98] |
| CP@pTTh | Zn foil | RhB | [RhB]0 = 16.0 mg L−1, pH = 3.0, Na2SO4 = 50.0 μM, j = 195.0 mA cm−2, 300 W xenon lamp | O2 aeration | H2O2, •O2−, •OH | Almost 100.0% |
- | [99] |
| FeCu@PC | RuO2 | SMT | [SMT]0 = 80.0 mg L−1, pH = 3.0–7.0, Na2SO4 = 20.0 mmol L−1, I = 25.0 mA, 5 W UV lamp | O2 aeration | H2O2, •O2−, •OH | 96.3% | 73.3% | [100] |
| Co-free MWCNTs | BDD | Bronopol | [Bronopol]0 = 0.28 mM, pH = 3.0, Na2SO = 50.0 μM, Sunlight, j = 40.0 mA cm−2 | O2 aeration | H2O2, •OH | 94.0% | 88.0% | [101] |
| GDE | Pt | SY dye | [SY dye]0 = 100.0 mg L−1, pH = 3.0, Na2SO4 = 100.0 mM, pH = 3.0, Solar irradiation, I = 100.0 mA | O2 aeration | H2O2, •OH | 100.0% | 71.0% | [102] |
| GDE | BDD thin film | MET | [MET]0 = 90.0 mg L−1, pH = 3.0, Na2SO4 = 50.0 mM, j = 100.0 mA cm−2 | Air aeration | H2O2, •OH, 1O2 | 70.0% | 32.0% | [103] |
| FPC | WO3 | BPA | [BPA]0 = 10.0 mg L−1, pH = 3.0, Na2SO4 = 50.0 μM, 500 W xenon lamp, j = 1.0 mA cm−2 | O2 aeration | H2O2, •OH | 90.0% | 40.0% | [107] |
| Carbon cloth | Fe3O4@NiCo2O4 | RhB | [RhB]0 = 10.0 mg L−1, pH = 3.0, Na2SO4 = 0.1 M, j = 7.5 mA cm−2, 150 W SAIC visible light lamp | O2 aeration | H2O2, •OH | 99.0% | 60.0% | [108] |
| Pt | FST | SMT | [SMT]0 = 10.0 mg L−1, Acidic condition, Na2SO4 = 0.1 M, j = 7.7 mA cm−2, LED light | Air aeration | H2O2, •O2−, •OH | 96.3% | 73.3% | [112] |
| Mo-SACs/mrG | SnO2−x/BiVO4 | MB | [MB]0 = 5.0 mg L−1, Acidic condition, Simulated solar light, j = 1.5 mA cm−2 | O2 aeration | H2O2, •OH | 99.5% | - | [116] |
Abbreviations: CP@pTTh, carbon paper@polyterthiophene; FeCu@PC, FeCu@porous carbon; MWCNTs, multiwalled carbon nanotubes; BDD, boron-doped diamond; GDE, gas diffusion electrode; FPC, F-doped porous carbon; Mo-SACs/mrG, Mo single-atom catalysts/mildly reduced graphene; FST, Fe3O4@SiO2@mesoporous TiO2; CIP, ciprofloxacin; RhB, rhodamine B; SMT, sulfamethazine; SY, sunset yellow; MET, methomyl; BPA, bisphenol A; MB, methylene blue.