Low temperature, rapid solution growth of antifouling silver-zeolite nanocomposite clusters

Yee, M.S.L. and Khiew, P.S. and Tan, Y.F. and Chiu, Wee Siong and Kok, Y.Y. and Leong, C.O. (2015) Low temperature, rapid solution growth of antifouling silver-zeolite nanocomposite clusters. Microporous and Mesoporous Materials, 218. pp. 69-78. ISSN 1387-1811, DOI https://doi.org/10.1016/j.micromeso.2015.07.004.

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Official URL: http://dx.doi.org/10.1016/j.micromeso.2015.07.004


Biofouling is a common and pervasive problem which reduces the efficiency of man-made marine structures. Silver-zeolite (AgZ) nanocomposite material is proposed as a promising anti-microfouling agent. Metallic silver nanoparticles were immobilized on silver ion doped ZSM-5 zeolites using a green reducing agent, trisodium citrate. The stable and porous inner structure of ZSM-5 zeolites performs a dual role as a stable size-control template and a reservoir of antimicrobial nanosilver. SEM revealed the globular and cluster-like morphology of the AgZ composites, with a homogenous distribution of silver particles on the surface of the AgZ clusters, while TEM analysis indicated Ag nanoparticles could be detected both on the surface and within the zeolite. UV-visible analysis on AgZ displayed the characteristic surface plasmon resonance absorption maximum for Ag nanoparticles ranging from 408 to 500 nm. Indeed, BET analysis also showed a reduction in surface area of up to 44% with the incorporation of Ag nanoparticles into the zeolite, indicating the formation and growth of Ag within ZSM-5 zeolite. XRD analysis indicated the presence of metallic Ag while the ZSM-5 crystalline framework remained largely intact after the Ag crystal growth process. The AgZ nanocomposites were evaluated for their biofilm inhibition activity against Halomonas pacifica, a common marine bacterium implicated in the early stages of biofouling. AgZ loaded with up to 10 wt% Ag reduced biofilm attachment by 81%, and inhibited the growth of marine microalgae Dunaliella tertiolecta and Isochrysis sp. Overall, results demonstrated the effective anti-microfouling property of AgZ nanocomposites.

Item Type: Article
Funders: Ministry of Science, Technology & Innovation (MOSTI) of Malaysia: Science fund program (04-02-12-SF0149), HIR-Chancellery UM (UM.C/625/1/HIR/079), (J-21002-73810), HIR-MOHE (UM.C/625/1/HIR/MOHE/SC/06)
Uncontrolled Keywords: Ag; Antifouling; Green synthesis; Nanocomposite; ZSM-5 zeolite
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
R Medicine
Divisions: Faculty of Science > Department of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 21 Sep 2018 06:45
Last Modified: 20 Sep 2019 02:22
URI: http://eprints.um.edu.my/id/eprint/19380

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