Journal of Industrial and Engineering Chemistry, Vol.10, No.5, 745-751, September, 2004
Influence of the Treated Metals on the Physicochemical Properties and Biological Behavior of Activated Carbon Fibers
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The adsorption isotherms of metal-treated activated carbon fibers(ACFs) can be assigned as typical Type I for Ag and Cu-treated ACFs and Types I and II for Ni-treated ACFs. The SBET values of metal-treated ACFs fall in the range 113.183~1574.13 m2/g. The average radii of the ACFs calculated using the α-method fall in the range 9.691~22.29 Å for Ag, 9.81~11.0 Å for Cu, and 5.49~12.5 Å for Ni. From the SEM results, we observed that after treatment almost all of the surface of the ACFs is blocked and coated by the surface blocking effect of the metals. From the DSC analysis, the only exothermic curve occurs for Ag0.9-ACF at a temperature of 203℃; relatively stable composition curves were formed. In contrast, Cu0.3-ACF and Cu0.4-ACF exhibit endothermic curves at temperatures of 57.26, 107.02, and 215.87℃. Ni1.0-ACF displays large endothermic curves at 59.26, 98.40, and 208.89℃ and Ni0.8-ACF exhibits endothermic curves at 59.26 and 157.77℃. From the results of IR spectroscopic analysis, we see, for example, the peaks of aromatic hydroxyl groups, nitrogen atoms bearing adjacent hydrogen atoms, aromatic rings, -CH3 groups, and aromatic rings bearing isolated hydrogen atoms. The ACF derivatives incorporating metal functional groups showed adsorption and antibacterial activity against E. coli, which suggests they may be promising antibacterial materials.
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