| 摘要: |
| 过氧化氢(H2O2)等活性氧(ROS)物质因具有绿色高效的特点,在废水处理、杀菌消毒等领域受到研究者广泛关注。利用电催化生成H2O2是一种实时提供活性氧物质的有用方法。然而,目前报道的大多数高性能催化材料都是粉体形式,不便于在实际场景中的应用。因此,制备可直接应用的电极材料显得尤为重要。本研究利用喷涂-热解的制备方法,制备了高活性氧催化活性的氧化炭黑(O−CB)/多孔碳毡电极,通过聚四氟乙烯(PTFE)的修饰优化电极表面的氧气传质,成功制备氧掺杂碳气体扩散电极。研究结果表明,O−CB/PTFE-5 wt%电极具有最高的催化性能,其合成H2O2的速率达27.19 mg·L-1(mg catalyst)-1·cm-1·h-1。海洋典型污损微生物假单胞菌(Pseudomonas sp.)的抗菌实验表明,该电极电催化作用60 min产生的活性氧对Pseudomonas sp.的杀菌率可达到97.69%,作用120 min的杀菌率可达到99.99%。 |
| 关键词: 活性氧 H2O2 电催化杀菌 氧化炭黑 抗菌防污 |
| DOI：10.11759/hykx20230320001 |
| 分类号:Q958 |
| 基金项目:中国科学院基础前沿科学研究计划从0到1原始创新项目(ZDBS-LY-DQC025);山东省自然科学青年基金项目(ZR2022QD001) |
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| Electrocatalytic production of reactive oxygen species with oxygen-doped carbon-based gas diffusion electrode for antibacterial antifouling |
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LI Jian-hua1,2, WANG Nan1, DUAN Ji-zhou1, HOU Bao-rong1
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1.CAS Key Laboratory of Marine Environmental Corrosion and Bio-Fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2.University of Chinese Academy of Sciences, Beijing 100049, China
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| Abstract: |
| Hydrogen peroxide (H2O2) and other reactive oxygen species (ROS) have gained considerable attention for wastewater treatment and disinfection because they are ecofriendly and highly efficient. The electrocatalytic production of H2O2 is an effective method for generating reactive species in real time for on-site applications. However, most of the reported high-performance catalysts are synthesized in powder form, which is not conducive to direct application. Therefore, exploring novel electrode preparation methods for generating H2O2 and ROS is particularly important. Herein, a spray-pyrolysis strategy is employed to deposit highly active oxidized carbon black (O−CB) catalysts onto a carbon felt substrate. Further, polytetrafluoroethylene (PTFE) is added to improve the oxygen diffusion on the electrode surface. The results show that the O−CB/PTFE-5 wt% electrode can achieve efficient H2O2 production (27.19 mg·L-1·(mg catalyst)-1·cm-1·h-1). Results of antibacterial experiments demonstrate that electrocatalytic production of ROS using an O−CB/PTFE electrode can achieve disinfection efficiencies of 97.69% and 99.99% within 60 and 120 min, respectively, when directly applied to the typical marine fouling microorganism Pseudomonas sp. |
| Key words: reactive oxygen species H2O2 electrocatalytic disinfection oxidized carbon black antibacterial antifouling |
