氧掺杂碳气体扩散电极用于电催化产活性氧抗菌防污研究  

Electrocatalytic production of reactive oxygen species with oxygen-doped carbon-based gas diffusion electrode for antibacterial antifouling

作　　者：李建华 王楠[1] 段继周[1] 侯保荣[1] LI Jian-hua;WANG Nan;DUAN Ji-zhou;HOU Bao-rong(CAS Key Laboratory of Marine Environmental Corrosion and Bio-Fouling,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院海洋研究所海洋环境腐蚀与生物污损重点实验室,山东青岛266071 [2]中国科学院大学,北京100049

出　　处：《海洋科学》2023年第10期1-9,共9页Marine Sciences

基　　金：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)。

摘　　要：过氧化氢(H_(2)O_(2))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H_(2)O_(2)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H_(2)O_(2)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Pseudomonassp.的杀菌率可达到97.69%,作用120min的杀菌率可达到99.99%。Hydrogen peroxide(H_(2)O_(2))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 H_(2)O_(2)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 H_(2)O_(2)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 H_(2)O_(2)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.

关 键 词：活性氧 H_(2)O_(2) 电催化杀菌 氧化炭黑 抗菌防污 

分 类 号：Q958[生物学—动物学]