| Embedding of Ag by Porous Substitute on Glazed
Ceramics for Sustained Antibiotic Release |
Qian Zhang,1, 2, 3 Jun Ming Hong1, 2, 3 and Lv Si Xu1, 2, 3, *
Pages : 20-25
DOI : 10.1080/0371750X.2018.1442749 |
| Abstract |
| Sustained antibiotic release of Ag ions on glazed ceramics has been addressed
by MCM-41. For this purpose, the feasibility of sol-gel method and hydrothermal
method for Ag-MCM-41 preparation has been discussed. The characterizations of
the materials were done by scanning electron microscopy, energy dispersive
spectroscopy, nitrogen adsorption-desorption isotherms and X-ray photoelectron
spectroscopy. Results indicated that Ag element (AgO, Ag2O, Ag2O3 and metallic
Ag) was loaded on the surface of S-Ag-MCM-41 (sol-gel method), but in the pores
of H-Ag-MCM-41 (hydrothermal method). The inside loading of Ag in H-Ag-MCM-41
shows more positive effect for stable antibacterial property against E.coli as well
as Ag release of glazed ceramics, rather than S-Ag-MCM-41. The Ag release of
S-Ag-MCM-41 decreased from 0.063-0.072 to 0.028-0.038 mg.L–1 after one cycle,
much larger as compared to H-Ag-MCM-41 (from 0.032-0.063 to 0.031-0.033).
[Keywords: Ag releasing, MCM-41 embedding, Loading position, Ag valence] |
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