Table 1.
Representative studies on the degradation of organic pollutants by photocatalytic oxygen activation.
| Catalysts | Mechanism | Contami-nants | Reaction conditions | O2 supply | ROS | Removal efficiency | TOC removal | Reference |
|---|---|---|---|---|---|---|---|---|
| OV-BOC | Energy transfer | RhB | [RhB]0 = 10.0 mg L−1, 300 W Xenon lamp, pH = 3.5 | Dissolved oxygen | 1O2, •O2− | 99.8% (30.0 min) | - | [23] |
| BWO-0.18 | Energy transfer | NaPCP | [NaPCP]0 = 30.0 × 10−6 mg L−1, 300 W Xenon lamp | Dissolved oxygen | 1O2, •O2− | 99.9% (1.0 h) | 90.0% | [24] |
| Nd-BiO2−x | Electron transfer | Doxycycline | [Doxycycline]0 = 10.0 mg L−1, 300 W xenon lamp | Dissolved oxygen | •O2− | 94.2% (1.0 h) | 72.0% | [25] |
| BMO-3 | Electron transfer | APAP | [APAP]0 = 20.0 μmol L−1, 300 W Xenon lamp, pH = 6.8 | Dissolved oxygen | H2O2 | 96.0% (2.0 h) | 61.0% | [27] |
| FT-200 | Electron transfer | 2,4-DCP | [2,4-DCP]0 = 20.0 μmol L−1, 300 W Xenon lamp, pH = 3.0 | Dissolved oxygen | H2O2, •OH | 100.0% (6.0 min) | 91.5% | [28] |
| N-GQDs/Bi2Fe4O9 | Electron transfer | BPA | [BPA]0 = 20.0 mg L−1, 300 W Xenon lamp, pH = 3.0 | Dissolved oxygen | •OH | 99.8% (90.0 min) | - | [29] |
| Sv-MoS2/BN-5 | Electron transfer | E. coli | [E. coli]0 = 6.0 × 107 CFU mL−1, 300 W Xenon lamp, pH = 3.0 | Dissolved oxygen | H2O2 | 100.0% (60.0 min) | - | [35] |
| CZS-5 | Electron transfer | phenol | [phenol]0 = 20.0 mg L−1, 300 W Xenon lamp, pH = 7.0 | O2 aeration | H2O2 | 97.6% (180.0 min) | 87.0% | [36] |
| Cv-PCNNS | Electron transfer | MTZ | [MTZ]0 = 10.0 mmol L−1, 300 W Xenon lamp, pH = 7.0 | O2 aeration | H2O2, •OH | 90.7% (100.0 min) | 62.0% | [47] |
| g-C3N4 | Electron transfer | TC | [TC]0 = 50.0 ppm, 300 W Xenon lamp, pH = 7.0 | Dissolved oxygen | H2O2, •OH | 90.0% (300 min) | - | [48] |
| FeOOH/UPCN | Electron transfer | OTC | [OTC]0 = 20.0 mg L−1, 300 W Xenon lamp, pH = 7.0 |
Dissolved oxygen | H2O2, •OH | 86.2% (120.0 min) | 48.6% | [49] |
Note: “Dissolved oxygen” refers to the oxygen that comes from the dissolved oxygen in the aqueous solution without any aeration; “Air aeration” refers to the main source of oxygen in the system from the air; “O2 aeration” signifies that the primary source of oxygen in the system is pure oxygen. Abbreviations: OV-BOC, BiOCl with oxygen vacancy; BWO, Bi2WO6; Nd-BiO2−x, Nd doped BiO2−x; BMO-3, iodine-doped Bi2MoO6; FT-200, Fe2O3 loaded TiO2 nanoparticles; N-GQDs/Bi2Fe4O9, nitrogen-doped graphene quantum dots/Bi2Fe4O9; Sv-MoS2/BN-5, sulfur vacancy-rich MoS2/boron nitride; CZS-5, N-doped hollow carbon spheres/Zn2In2S5; Cv-PCNNS, porous g-C3N4 nanosheets with carbon vacancies; g-C3N4, graphitic carbon nitride; FeOOH/UPCN, iron-based oxyhydroxides/ultrathin porous g-C3N4; RhB, rhodamine B; NaPCP, sodium pentachlorophenate; APAP, acetaminophen; 2,4-DCP, 2,4-dichlorophenol; BPA, bisphenol A; E. coli, Escherichia coli; MTZ, metronidazole; TC, tetracycline; OTC, oxytetracycline.