J. Mater. Sci. Technol. ›› 2021, Vol. 75: 86-95.DOI: 10.1016/j.jmst.2020.10.006

• Research Article • Previous Articles     Next Articles

Biofilm inhibition mechanism of BiVO4 inserted zinc matrix in marine isolated bacteria

Xiaofan Zhaia,c,e, Peng Jua,b,d,*(), Fang Guana,c,e, Jizhou Duana,c,e,*(), Nan Wanga,c,e, Yimeng Zhanga,c,e, Ke Lia, Baorong Houa,c,e   

  1. a CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao, 266071, China
    b Key Laboratory of Marine Eco-Environmental Science and Technology, Marine Bioresource and Environment Research Center, First Institute of Oceanography, Ministry of Natural Resources (MNR), No. 6 Xianxialing Road, Qingdao, 266061, China
    c Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 1 Wenhai Road, Qingdao, 266235, China
    d Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 1 Wenhai Road, Qingdao, 266237, China
    e Center for Ocean Mega-Science, Chinese Academy of Sciences, No. 7 Nanhai Road, Qingdao, 266071, China
  • Received:2020-06-15 Revised:2020-08-10 Accepted:2020-08-11 Published:2020-11-02 Online:2020-11-02
  • Contact: Peng Ju,Jizhou Duan
  • About author:duanjz@qdio.ac.cn (J. Duan).
    *CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, No.7Nanhai Road, Qingdao, 266071, PR China. E-mail addresses: jupeng@fio.org.cn (P. Ju),

Abstract:

Biofilm plays an important role on microbial corrosion and biofouling in marine environments. Inhibiting biofilm formation on construction surfaces is of great importance. Photocatalytic material with visible-light response, especially BiVO4, is regarded as a promising material for biofilm inhibition due to its green biocidal effect and high antibacterial efficiency. Approaches which can immobilize the photocatalytic particles onto metal surfaces with high mechanical strength are requisite. In this study, zinc matrixes were served as carriers for BiVO4 particles. The BiVO4-inserted zinc matrixes were successfully obtained by ultrasound assisted electrodeposition. The insertion content of BiVO4 showed positive correlation with ultrasound power. Highly enhanced biofilm inhibition properties were obtained by BiVO4 inserted zinc matrixes with an over 95 % decreased bacterial coverage. It was proved that·O2- (chief) and ·OH (subordinate) radicals were responsible for the high biocidal performance. Possible antibacterial mechanism was proposed, indicating that the photoinduced holes would both attack zinc crystals to generate active electrons to form ·O2- radicals, and react with H2O to generate·OH, finally. Furthermore, corrosion resistance of the matrixes was proved to be stable due to the insertion of BiVO4. This study provides a potential application for photocatalyst in marine antifouling and anti-biocorrosion aspects.

Key words: Biofilm inhibition, BiVO4, Zinc matrix, BiVO4-Zn composite coating, Marine antifouling, Corrosion resistance