Antibacterial rGO-CuO-Ag film with contact- and release-based inactivation properties.
KAUST DepartmentEnvironmental Science and Engineering Program
Water Desalination and Reuse Research Center (WDRC)
Biological and Environmental Sciences and Engineering (BESE) Division
Online Publication Date2020-08-30
Print Publication Date2020-12
Embargo End Date2021-09-02
Permanent link to this recordhttp://hdl.handle.net/10754/665024
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AbstractTo reduce the high operational costs of water treatment because of membrane biofouling, next-generation materials are being developed to counteract microbial growth. These modern anti-biofouling strategies are based on new membrane materials or membrane surface modifications. In this study, antimicrobial films comprising rGO, rGO-CuO, rGO-Ag, and rGO-CuO-Ag were synthesized, evaluated, and tested for potential biofouling control using Pseudomonas aeruginosa PAO1 as the model bacterium. The combined rGO-CuO-Ag film displayed enhanced reduction (10-log reduction) in biofouling in comparison to the rGO film (control), followed by the rGO-Ag film (8-log reduction) and rGO-CuO film (0-log reduction). This demonstrated that the use of mixed antimicrobial agents is more effective in reducing biofouling than that of a single agent. The rGO-Cu-Ag film exhibited consistent, controlled, and moderate release of silver (Ag) ions. The release of Ag ions produced a long-lasting antimicrobial effect. These results underscore the potential applications of combined antimicrobial surface-based agents in practice and further research.
CitationAlayande, A. B., Kim, C.-M., Vrouwenvelder, J. S., & Kim, I. S. (2020). Antibacterial rGO–CuO–Ag film with contact- and release-based inactivation properties. Environmental Research, 110130. doi:10.1016/j.envres.2020.110130
SponsorsThis work was supported by the Korea Environmental Industry & Technology Institute (KEITI) through the Industrial Facilities & Infrastructure Research Program, funded by the Korea Ministry of Environment (MOE) (1485016165) and GIST Research Institute (GRI) grant funded by GIST in 2020.
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