催化学报 ›› 2026, Vol. 88: 183-206.DOI: 10.1016/S1872-2067(26)65144-3
刘淑芳a,1, 陈锋宇a,1, 李思媛a, 叶宇昕a,*(
), 欧阳钢锋a,b,*(
)
收稿日期:2025-12-20
接受日期:2026-02-22
出版日期:2026-09-18
发布日期:2026-09-05
通讯作者:
*电子信箱: yeyuxin5@mail.sysu.edu.cn (叶宇昕),基金资助:
Shufang Liua,1, Fengyu Chena,1, Siyuan Lia, Yu-Xin Yea,*(
), Gangfeng Ouyanga,b,*(
)
Received:2025-12-20
Accepted:2026-02-22
Online:2026-09-18
Published:2026-09-05
About author:Yu-Xin Ye (School of Chemical Engineering and Technology, Sun Yat-sen University) received her B.S. degree from Sun Yat-sen University in 2011 and Ph.D. degree in 2017. From 2018 to 2023, she conducted postdoctoral research under the supervision of Professor Ouyang Gangfeng. She joined the School of Chemical Engineering and Technology at Sun Yat-sen University in 2023. She is Excellent Young Scientists of National Natural Science Foundation of China (2024). She has published over 20 papers as the first or corresponding author in prestigious journals such as Nat. Water., Proc. Natl. Acad. Sci. U.S.A., Adv. Mater., Chin. J. Catal., Nat. Commun., and Angew. Chem. Int. Ed. Her research focuses on the design of novel organic photocatalysts, the characterization and regulation of photophysical and photochemical processes, photocatalytic synthesis and application of hydrogen peroxide, and photocatalytic degradation of environmental pollutants.Supported by:摘要:
近年来, 传统活性氧物种(ROS)虽具有高反应活性, 却因选择性差、易引发底物过度矿化、寿命短暂(微秒至毫秒级)且依赖捕获剂检测等固有局限, 难以满足精准氧化过程对可控性的要求. 与之形成鲜明对比的是, 氧中心有机自由基(OCORs)凭借其未配对电子在π-共轭体系中的高度离域, 获得了显著的动力学稳定性, 使其寿命由分钟级延长至数年, 且无需捕获剂即可直接检测. 更重要的是, OCORs兼具高反应活性与可调的氧化还原特性, 不仅可作为选择性氧化的关键中间体, 还能通过结构转化在自然及人工光催化系统中发挥高效的电子介导作用. 这种兼具稳定性与可调控性的电子构型, 使其在光合作用模拟、环境修复等诸多前沿领域展现出广阔的应用前景.
本文系统介绍了OCORs的表征方法、前驱体合成策略及其在光催化领域的研究进展. 首先, 从经典的基于醌/氢醌氧化还原过程的芳氧自由基和半醌型自由基出发, 梳理了OCORs的发展脉络, 阐述了其未配对电子离域于扩展π共轭体系所赋予的独特电子结构. 在表征方法上, OCORs的鉴定需采用多技术联用策略: 电子顺磁共振可提供最直接的自由基证据, 但常需结合自由基捕获实验进行定性确认; 氧气消耗测试可作为间接表征手段; 电化学方法与原位振动光谱有助于解析反应机理与中间体结构; 而密度泛函理论计算则为OCORs的指认提供理论支撑. 这种多模式协同方法突破了单一技术的局限, 是实现OCORs精准鉴定的关键. 在前驱体合成策略方面, 本文归纳了以醌类和蒽醌类化合物为前体, 通过Suzuki-Miyaura偶联、Sonogashira-Hagihara偶联、Buchwald-Hartwig胺化及酚醛缩合等反应构筑OCORs前驱体的模块化合成路线. 在光催化应用领域, OCORs作为关键活性中间体展现出多方面的优异性能: 在光催化合成过氧化氢、二氧化碳还原制备高附加值化学品等反应中, OCORs可显著提升催化效率; 在环境修复领域, OCORs作为长寿命中间体参与水体酚类污染物降解, 兼具高选择性与高效性; 在光催化杀菌方面, 可实现低光强下细菌的高效失活; 在有机合成中, 凭借其优异的电子转移能力, 成功应用于C(sp3)-H键光氧化反应的选择性调控. 上述研究进展为OCORs在能源、环境和合成化学领域的应用奠定了坚实基础. 尽管OCORs在光催化领域前景广阔, 其发展仍面临如何精准光生电荷转移路径以提高OCORs的生成选择性、延长OCORs在反应体系中的寿命、拓展人工光合作用及环境修复等新应用体系, 以及实现催化剂的规模化制备与运行稳定性等多重挑战. 破解上述难题, 是深化自由基光化学认知、推动高效光催化体系应用的关键.
综上, 本文系统总结了OCORs的表征方法、合成策略、光催化应用及现存挑战, 以期引发研究人员的深入思考. 未来发展方向应聚焦于OCORs的精准生成与稳定性提升, 积极开拓人工光合作用与环境修复等新体系, 并攻克规模化制备难题, 加速其走向实际应用.
刘淑芳, 陈锋宇, 李思媛, 叶宇昕, 欧阳钢锋. 氧中心有机自由基最新研究进展: 表征、合成及应用[J]. 催化学报, 2026, 88: 183-206.
Shufang Liu, Fengyu Chen, Siyuan Li, Yu-Xin Ye, Gangfeng Ouyang. Recent advances in oxygen-centered organic radicals: Characterization, synthesis, and applications[J]. Chinese Journal of Catalysis, 2026, 88: 183-206.
Fig. 1. (a) Chemical structures of CZAQ-1, CZAQ-2 and CZAQ-3. (b,c) EPR spectra of CzAQ-1 under Ar atmosphere before and after light irradiation, and the corresponding signal intensity variations. (d-f) EPR spectra of CzAQ-1 and CzAQ-2 under oxygen atmosphere with light irradiation. (g) Corresponding signal intensity variations. Reprinted with permission from Ref. [50]. Copyright 2024, Elsevier.
Fig. 2. (a) Mechanism diagram of competing electron transfer pathways in quinonoid structures. (b) The degradation efficiency of phenol using CZAQ-1 with different sacrificial agents under visible light of 10 mW·cm-2. Reprinted with permission from Ref. [50]. Copyright 2024, Elsevier.
Fig. 3. (a) The chemical structure of quinoid compounds. (b) O2 consumption and radical formation during reaction of 9,10-PQ with sulfur compounds. Dissolved oxygen was monitored by a meter in solutions of 5 μmol·L-1 9,10-PQ mixed with a series of reductants: Glutathione (GSH), Dithiothreitol (DTT), Na2S, Na2S2, Na2S3, and Na2S4. Reprinted with permission from Ref. [53]. Copyright 2019, American Chemical Society.
Fig. 4. (a) A Schematic depicts the formation process and resultant structure of GH-PDANSs. (b) Illustration of the initial dopamine autoxidation steps. (c) CV profiles of sample film-coated GCE obtained in a solution of 0.1 mol·L-1 Bu4NPF6 in acetonitrile as the supporting electrolyte at a scan rate of 0.1 V s-1. Reprinted with permission from Ref. [55]. Copyright 2022, Elsevier.
Fig. 5. (a) Initial steps of anthraquinone oxidation. (b) The structures and synthesis of TPC-3D, PYR-2D, and TPL-2D. (c) In-situ DRIFTS of light in argon and dark in oxygen process of TPC-3D. Reprinted with permission from Ref. [59]. Copyright 2024, Springer Nature.
Fig. 6. (a) The structures and synthesis of TPE-AQ and TPE-AC. (b) The odd-electron density in a single D-A unit of TPE-AQ through DFT calculation. Reprinted with permission from Ref. [27]. Copyright 2021, National Academy of Sciences.
Fig. 8. (a) Synthesis of p-semiquinone-radical-bridged RE complexes 1 and 2. (b) Molecular structure of complex 1. All of the hydrogen atoms are omitted for clarity. Reprinted with permission from Ref. [68]. Copyright 2020, American Chemical Society.
Fig. 9. (a) The preparation of ECUT-AC and ECUT-AQ through Suzuki-Miyaura cross-coupling polycondensation. Reprinted with permission from Ref. [71]. Copyright 2022, Elsevier. (b) Synthetic routes of AQ-PAFs. (c) Photocatalytic H2O2 production by PAFs, building blocks, and photocatalytic H2O2 production by PAF-379 (d) using real water samples. Conditions: 50 mL water, photocatalyst (1 mg), air, λ > 420 nm, 300 W Xe lamp, 100 mW·cm-2. Reprinted with permission from Ref. [72]. Copyright 2025, John Wiley and Sons.
Fig. 10. (a) Synthetic routes of PQ-AB and FR-AB. Reprinted with permission from Ref. [78]. Copyright 2025, John Wiley and Sons. (b) Synthetic routes of P-PTAQ and O-PTAQ. (c) Temperature-dependent PL intensity of O-PTAQ (100-200 K). (d) Interconversion of charge-separated state (CS) and the lowest singlet excited state (S1) in common materials with positive exciton binding energy (Eb) and the required activation energy Ea (S1 → CS). (e) In O-PTAQ, the mutual transitions between CS and S1 involves a negative (Eb), with the activation energy (Ear) from CS to S1. Reprinted with permission from Ref. [79]. Copyright 2025, John Wiley and Sons.
Fig. 11. Illustration of the synthetic approach carried out for the synthesis of the tetratopic ligand via Buchwald-Hartwig amination reaction. Reprinted with permission from Ref. [81]. Copyright 2022, American Chemical Society.
| Catalyst | H2O2 yield (µmol·h-1·g-1) | AQY b | SCC c (%) | Conditions | Stability | Ref. |
|---|---|---|---|---|---|---|
| Nv-C≡N-CN | 137 | 36.2% at 400 nm | 0.23 | O2 | 5 cycles for 5 h | [94] |
| COF-N32 | 605 | 6.2 % at 469 nm | 0.31 | O2 | 5 cycles for 60 h | [95] |
| COF-TfBpy | 1042 | 8.1% at 420 nm | 0.57 | O2 | 5 cycles for 40 h | [96] |
| CNW03 | 1889 | 8.53% at 420 nm | 0.31 | O2 | 4 cycles for 4 h | [97] |
| 2D-CTF | 2412 | 16.8% at 420 nm | 0.91 | O2 | 5 cycles for 10 h | [98] |
| DE7-M | 2444 | 8.7% at 420 nm | 0.28 | O2 | 5 cycles for 10 h | [99] |
| TTP | 3132 | 7.61% at 420 nm | 0.35 | O2 | 6 cycles for 6 h | [100] |
| CHF-DPDA | 3450 | 16% at 420 nm | 0.78 | O2 | 3 cycles for 18 h | [101] |
| SO3H-COF | 4971 | 15% at 400 nm | 0.40 | O2 | 5 cycles for 4.17 h | [102] |
| TPB-COF-OH | 6608 | 9.61% at 420 nm | 0.84 | O2 | 12 h | [103] |
| TPT-alkynyl-AQ d | 2368 | 25% at 365 nm | 0.35 | Air | 5 cycles for 5 h | [28] |
| PAQ-TABPB | 3351 | 6.36% at 400 nm | 0.36 | O2 | 8 cycles for 32 h | [104] |
| PQ-AB | 3400 | 5.2% at 400 nm | 0.20 | Air | 5 cycles for 5 h | [78] |
| Sulfonyl-AQ | 3849 | 25.9% at 420 nm | 1.29 | Air | 5 cycles for 5 h | [105] |
| PAF-363 | 3930 | 5.32% at 420 nm | 0.57 | Air | 10 cycles for 10 h | [106] |
| BCz-AQ | 4007 | 25.9% at 470 nm | 0.51 | Air | 10 cycles for 10 h | [107] |
| BTT-AQ | 4218 | 8.60% at 420 nm | — | Air | 46 h | [108] |
| Cz-AQ | 4401 | 28.7% at 420 nm | 1.25 | Air | 6 cycles for 10 h | [93] |
| TPC-3D | 5940 | 30.9% at 420 nm | 3.60 | Air | 5 cycles for 5 h | [59] |
| TPM-DADK | 7210 | 46.2% at 405 nm | 3.07 | Air | 5 cycles for 10 h | [109] |
Table 1 Comparison of photocatalytic H2O2 production performance between non-OCORs and OCORs-based photocatalysts a.
| Catalyst | H2O2 yield (µmol·h-1·g-1) | AQY b | SCC c (%) | Conditions | Stability | Ref. |
|---|---|---|---|---|---|---|
| Nv-C≡N-CN | 137 | 36.2% at 400 nm | 0.23 | O2 | 5 cycles for 5 h | [94] |
| COF-N32 | 605 | 6.2 % at 469 nm | 0.31 | O2 | 5 cycles for 60 h | [95] |
| COF-TfBpy | 1042 | 8.1% at 420 nm | 0.57 | O2 | 5 cycles for 40 h | [96] |
| CNW03 | 1889 | 8.53% at 420 nm | 0.31 | O2 | 4 cycles for 4 h | [97] |
| 2D-CTF | 2412 | 16.8% at 420 nm | 0.91 | O2 | 5 cycles for 10 h | [98] |
| DE7-M | 2444 | 8.7% at 420 nm | 0.28 | O2 | 5 cycles for 10 h | [99] |
| TTP | 3132 | 7.61% at 420 nm | 0.35 | O2 | 6 cycles for 6 h | [100] |
| CHF-DPDA | 3450 | 16% at 420 nm | 0.78 | O2 | 3 cycles for 18 h | [101] |
| SO3H-COF | 4971 | 15% at 400 nm | 0.40 | O2 | 5 cycles for 4.17 h | [102] |
| TPB-COF-OH | 6608 | 9.61% at 420 nm | 0.84 | O2 | 12 h | [103] |
| TPT-alkynyl-AQ d | 2368 | 25% at 365 nm | 0.35 | Air | 5 cycles for 5 h | [28] |
| PAQ-TABPB | 3351 | 6.36% at 400 nm | 0.36 | O2 | 8 cycles for 32 h | [104] |
| PQ-AB | 3400 | 5.2% at 400 nm | 0.20 | Air | 5 cycles for 5 h | [78] |
| Sulfonyl-AQ | 3849 | 25.9% at 420 nm | 1.29 | Air | 5 cycles for 5 h | [105] |
| PAF-363 | 3930 | 5.32% at 420 nm | 0.57 | Air | 10 cycles for 10 h | [106] |
| BCz-AQ | 4007 | 25.9% at 470 nm | 0.51 | Air | 10 cycles for 10 h | [107] |
| BTT-AQ | 4218 | 8.60% at 420 nm | — | Air | 46 h | [108] |
| Cz-AQ | 4401 | 28.7% at 420 nm | 1.25 | Air | 6 cycles for 10 h | [93] |
| TPC-3D | 5940 | 30.9% at 420 nm | 3.60 | Air | 5 cycles for 5 h | [59] |
| TPM-DADK | 7210 | 46.2% at 405 nm | 3.07 | Air | 5 cycles for 10 h | [109] |
Fig. 13. (a) Synthesis of TPT-alkynyl-AQ, TPT-AQ, and TPT-imine-AQ. (b) Ambient H2O2 photosynthesis was conducted under natural sunlight, with water samples collected from diverse locations under recorded weather and temperature conditions. (c) Comparative H2O2 generation rates in various water matrices under ambient conditions. Reprinted with permission from Ref. [28]. Copyright 2022, National Academy of Sciences.
| Catalyst | Light conditions | CH4 yield (µmol·h-1·g-1) | CH4 selectivity (%) | Ref. |
|---|---|---|---|---|
| PeTt-POP | 100 W Xe lamp | 0.034 | 100 | [113] |
| Ru@TiMOF-10-NH2(I) | 300 W Xe lamp full spectrum | 2.5 | 10.8 | [114] |
| Pt/TiO2-SiO2 | 300 W Xe lamp (420-780 nm) | 9.7 | 39.8 | [115] |
| Bi2MoO6 | 300 W Xe lamp full spectrum | 12.4 | 44.6 | [116] |
| KBH-C3N4 | 300 W Xe lamp full spectrum | 5.93 | 88.2 | [117] |
| Ni5-CN | 300 W Xe lamp full spectrum | 0.5 | 18.9 | [118] |
| Au/Cd1-xS | 600 mW·cm-2 (200-800 nm) | 11.3 | 22 | [119] |
| TPA-DPA PPK | 100 W Xe lamp with an AM 1.5G filter | 0.043 | 98 | [120] |
| Cu-SA-CO | 300 W Xe lamp (400-750 nm) | 58.5 | 100 | [121] |
| TPA-PQ b | 300 W Xe lamp (400-750 nm) | 2150 | 97 | [122] |
| TPE-PT | 300 W Xe lamp full spectrum | 10.6 | 90 | [29] |
Table 2 Activity comparison between OCORs-based photocatalysts and other reported photocatalysts for photoredox methanation using H2O as the electron donor. a
| Catalyst | Light conditions | CH4 yield (µmol·h-1·g-1) | CH4 selectivity (%) | Ref. |
|---|---|---|---|---|
| PeTt-POP | 100 W Xe lamp | 0.034 | 100 | [113] |
| Ru@TiMOF-10-NH2(I) | 300 W Xe lamp full spectrum | 2.5 | 10.8 | [114] |
| Pt/TiO2-SiO2 | 300 W Xe lamp (420-780 nm) | 9.7 | 39.8 | [115] |
| Bi2MoO6 | 300 W Xe lamp full spectrum | 12.4 | 44.6 | [116] |
| KBH-C3N4 | 300 W Xe lamp full spectrum | 5.93 | 88.2 | [117] |
| Ni5-CN | 300 W Xe lamp full spectrum | 0.5 | 18.9 | [118] |
| Au/Cd1-xS | 600 mW·cm-2 (200-800 nm) | 11.3 | 22 | [119] |
| TPA-DPA PPK | 100 W Xe lamp with an AM 1.5G filter | 0.043 | 98 | [120] |
| Cu-SA-CO | 300 W Xe lamp (400-750 nm) | 58.5 | 100 | [121] |
| TPA-PQ b | 300 W Xe lamp (400-750 nm) | 2150 | 97 | [122] |
| TPE-PT | 300 W Xe lamp full spectrum | 10.6 | 90 | [29] |
Fig. 14. (a) Molecular structures of TPE-PT, TPE-AQ, and TPT-AQ, along with (b) the photocatalytic CO2 reduction performance evaluated in a gas-solid reactor under CO2 and water vapor at room temperature for 4 h, without adding any photosensitizer or sacrificial agent. (c) Cycling stability of TPE-PT for photocatalytic CO2 reduction over five consecutive runs. (d) Schematic illustrating the high electronic selectivity of TPE-PT for CH4 using only CO2 and H2O. Reprinted with permission from Ref. [29]. Copyright 2023, John Wiley and Sons.
| Catalyst | Condition | Light conditions (mW·cm-2) | Adsorption time (min) | Reaction time (min) | Degradation rate (%) | Ref. |
|---|---|---|---|---|---|---|
| WUCN-500 | 0.2 g·L-1 Cat, 0.28 mmol·L-1 (OA) | 350 (320 < λ < 800 nm) | 30 | 30 | 43 | [127] |
| ACN0.5 | 0.5 g·L-1 Cat, 0.01 mmol·L-1 (MB) | 38 (λ > 400 nm) | 60 | 300 | 100 | [128] |
| LZS | 0.2 g·L-1 Cat, 0.15 mmol·L-1 (4-CP) | 326 (320 < λ < 780 nm) | 30 | 10 | 100 | [129] |
| Cs2AgBiBr6 | 2.0 g·L-1 Cat, 0.20 mmol·L-1 (RhB) | 33 (λ > 420 nm) | 60 | 120 | 20 | [130] |
| G_THS | 0.125 g·L-1 Cat, 0.02 mmol·L-1 (CIP) | 135 (AM 1.5G) | 60 | 360 | 82 | [131] |
| g-C3N4 | 0.5 g·L-1 Cat, 0.09 mmol·L-1 (BPA) | 180 (300 W Xenon lamp) | 30 | 60 | 35 | [132] |
| COF-TD1 | 0.3 g·L-1 Cat, 0.02 mmol·L-1 (BPA) | 125 (λ > 420 nm) | 30 | 120 | 97 | [133] |
| TPE-AQ | 0.05 g·L-1 Cat, 0.002 mmol·L-1 (BPA) | 2.0 (λ > 400 nm) | 60 | 60 | 92 | [134] |
Table 3 Photocatalytic activity and light intensity between OCORs-based photocatalysts and other reported photocatalysts for micropollutants degradation. a
| Catalyst | Condition | Light conditions (mW·cm-2) | Adsorption time (min) | Reaction time (min) | Degradation rate (%) | Ref. |
|---|---|---|---|---|---|---|
| WUCN-500 | 0.2 g·L-1 Cat, 0.28 mmol·L-1 (OA) | 350 (320 < λ < 800 nm) | 30 | 30 | 43 | [127] |
| ACN0.5 | 0.5 g·L-1 Cat, 0.01 mmol·L-1 (MB) | 38 (λ > 400 nm) | 60 | 300 | 100 | [128] |
| LZS | 0.2 g·L-1 Cat, 0.15 mmol·L-1 (4-CP) | 326 (320 < λ < 780 nm) | 30 | 10 | 100 | [129] |
| Cs2AgBiBr6 | 2.0 g·L-1 Cat, 0.20 mmol·L-1 (RhB) | 33 (λ > 420 nm) | 60 | 120 | 20 | [130] |
| G_THS | 0.125 g·L-1 Cat, 0.02 mmol·L-1 (CIP) | 135 (AM 1.5G) | 60 | 360 | 82 | [131] |
| g-C3N4 | 0.5 g·L-1 Cat, 0.09 mmol·L-1 (BPA) | 180 (300 W Xenon lamp) | 30 | 60 | 35 | [132] |
| COF-TD1 | 0.3 g·L-1 Cat, 0.02 mmol·L-1 (BPA) | 125 (λ > 420 nm) | 30 | 120 | 97 | [133] |
| TPE-AQ | 0.05 g·L-1 Cat, 0.002 mmol·L-1 (BPA) | 2.0 (λ > 400 nm) | 60 | 60 | 92 | [134] |
Fig. 15. Comparison of traditional transient ROS (a) and long-lived OCORs (b). (c) Synthetic routes to TPE-AQ and TPE-FN. (d) Photocatalytic activity of TPE-AQ across varying light intensities. (e) Degradation of BPA by TPE-AQ in diverse natural water matrices. Reprinted with permission from Ref. [134]. Copyright 2025, Royal Society of Chemistry.
| Photocatalyst | Light condition | Organic pollutant | Dosage (g·L-1) | H2O2 activation | TOC removal b | Ref. |
|---|---|---|---|---|---|---|
| OPCN | λ > 400 nm 100 mW·cm-2 | 5 mg·L-1 phenol | 0.5 | O2; FeCl3·6H2O (0.4 g·L-1) | 26.09% (60 min) | [138] |
| Fe/RF | λ > 420 nm 35.2 mW·cm-2 | 50 mg·L-1 phenol | 0.4 | — | 68% (150 min) | [139] |
| Coral-B-CN | AM 1.5G | 20 mg·L-1 4-chlorophenol | 0.4 | O2; FeSO4·7H2O (0.02 g·L-1) | 70.30% (50 min) | [140] |
| C≡N-CN/IS/Ppy | λ > 420 nm 140 mW·cm-2 | 10 mg·L-1 metronidazole | 1 | O2; FeSO4·7H2O (0.08 g·L-1) | 59.10% (120 min) | [141] |
| CdS/rGO | λ > 420 nm; ULI c | 10 mg·L-1 phenol | 1 | O2; FeSO4·7H2O (0.5 g·L-1) | 43.66% (60 min) | [142] |
| BCz-AQ | λ > 400 nm 100 mW·cm-2 | 10 mg·L-1 phenol | 0.1 | Air; K-FeOCl (Heteroogeneous); 0.1 g·L-1) | 94% (90 min) | [107] |
Table 4 Comparison of mineralization for organic pollutants between OCORs-based photocatalysts and other reported photocatalysts. a
| Photocatalyst | Light condition | Organic pollutant | Dosage (g·L-1) | H2O2 activation | TOC removal b | Ref. |
|---|---|---|---|---|---|---|
| OPCN | λ > 400 nm 100 mW·cm-2 | 5 mg·L-1 phenol | 0.5 | O2; FeCl3·6H2O (0.4 g·L-1) | 26.09% (60 min) | [138] |
| Fe/RF | λ > 420 nm 35.2 mW·cm-2 | 50 mg·L-1 phenol | 0.4 | — | 68% (150 min) | [139] |
| Coral-B-CN | AM 1.5G | 20 mg·L-1 4-chlorophenol | 0.4 | O2; FeSO4·7H2O (0.02 g·L-1) | 70.30% (50 min) | [140] |
| C≡N-CN/IS/Ppy | λ > 420 nm 140 mW·cm-2 | 10 mg·L-1 metronidazole | 1 | O2; FeSO4·7H2O (0.08 g·L-1) | 59.10% (120 min) | [141] |
| CdS/rGO | λ > 420 nm; ULI c | 10 mg·L-1 phenol | 1 | O2; FeSO4·7H2O (0.5 g·L-1) | 43.66% (60 min) | [142] |
| BCz-AQ | λ > 400 nm 100 mW·cm-2 | 10 mg·L-1 phenol | 0.1 | Air; K-FeOCl (Heteroogeneous); 0.1 g·L-1) | 94% (90 min) | [107] |
Fig. 16. (a) The molecular structure of building blocks, BCZ-AQ, and CZ-AQ. (b) Comparison of TOC removal between BCZ-AQ and CZ-AQ. (c) Degradation performance under low light intensity (inset: TOC removal efficiency). (d) Reaction mechanism illustrating simultaneous micropollutant mineralization and H2O2 generation in UHSFP. Reprinted with permission from Ref. [107]. Copyright 2024, John Wiley and Sons.
| Photocatalyst | Light condition | Initial concentration of bacterial | Reaction time for complete disinfection | Ref. |
|---|---|---|---|---|
| Cu-MoS2 | 100 mW·cm-2 (Xeon lamp, AM 1.5G) | 5 log | 20 min (E. coli b) | [161] |
| CeO2/PCN | 100 mW·cm-2 (λ ≥ 420 nm) | 5 log | 120 min (S. aureus c) | [162] |
| FeSO4/H2O2 | 120 mW·cm-2 (Xeon lamp) | 6 log | 4 h (E. coli) | [163] |
| PEI/C3N4 | 150 mW·cm-2 (AM 1.5G) | 6.2 log | 45 min (E. coli) | [164] |
| SA-SADF-H+ | 100 mW·cm-2 (λ > 420 nm) | 8 log | 98.6% in 1.5 h (E. coli) | [165] |
| C3N4/PDINH | 100 mW·cm-2 (AM 1.5G) | 4 log | 40 min (S. aureus) | [166] |
| Cz-AQ | 100 mW·cm-2 (Xeon lamp, λ > 420 nm) | 5 log | 10 min (E. coli) | [60] |
| PF-Cz-AQ | 100 mW·cm-2 (Xeon lamp, λ > 420 nm) | 5 log | 15 min (E. coli) | [60] |
Table 5 Activity comparison for disinfection between OCORs-based photocatalysts and other reported photocatalysts a.
| Photocatalyst | Light condition | Initial concentration of bacterial | Reaction time for complete disinfection | Ref. |
|---|---|---|---|---|
| Cu-MoS2 | 100 mW·cm-2 (Xeon lamp, AM 1.5G) | 5 log | 20 min (E. coli b) | [161] |
| CeO2/PCN | 100 mW·cm-2 (λ ≥ 420 nm) | 5 log | 120 min (S. aureus c) | [162] |
| FeSO4/H2O2 | 120 mW·cm-2 (Xeon lamp) | 6 log | 4 h (E. coli) | [163] |
| PEI/C3N4 | 150 mW·cm-2 (AM 1.5G) | 6.2 log | 45 min (E. coli) | [164] |
| SA-SADF-H+ | 100 mW·cm-2 (λ > 420 nm) | 8 log | 98.6% in 1.5 h (E. coli) | [165] |
| C3N4/PDINH | 100 mW·cm-2 (AM 1.5G) | 4 log | 40 min (S. aureus) | [166] |
| Cz-AQ | 100 mW·cm-2 (Xeon lamp, λ > 420 nm) | 5 log | 10 min (E. coli) | [60] |
| PF-Cz-AQ | 100 mW·cm-2 (Xeon lamp, λ > 420 nm) | 5 log | 15 min (E. coli) | [60] |
Fig. 17. (a) Structures and synthesis of Cz-AQ, Cz-ANT and Cz-PHE. The PF-Cz-AQ film was prepared by electrospinning the mixed solution of Cz-AQ and PS. (b) Photograph of the on-site experimental setup. (c,d) Plate count agar results of water samples before and after 40 min treatment. (e) Schematic comparison of action modes between conventional short-lived ROS and OCORs. Reprinted with permission from Ref. [60]. Copyright 2025, Springer Nature.
Fig. 18. (a) Photocatalytic selective oxidation of C(sp3)-H bonds in hydrocarbons. (b) The BAL yields and selectivity of C(sp3)-H photooxidation reaction were evaluated using different halogen acids in CH3CN. (c) The formation rate of BAL and selectivity toward aldehydes were measured at different concentration of HBr in CH3CN. (d) Proposed reaction mechanism for the photoinduced aerobic oxidation of toluene in CH3CN. Reprinted with permission from Ref. [188]. Copyright 2026, American Chemical Society.
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