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.
Full text not available from this repository.Abstract
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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