| In this paper, we studied four different types of porous carbon-based materials, and uesd physical or chemical method to load silver or copper metal (Ag+or Cu2+) on the carbon-based materials to obtain series of inorganic antibacterial composites. The structures and properties of as-prepared samples were characterized and analyzed by various methods. The major contents were summarized as follows:(1) TiO2@C core-shell composite was prepared by a hydrothermal method using TiO2 as core and sucrose as carbon source. Then the synthesized TiO2@C served as a support for the immobilization of Ag by impregnation in AgN03 aqueous solution to obtain TiO2@C/Ag core-shell composite. It found that the optimized synthesis condition was identified at 600℃for 16 h. With the mass ratio of sucrose/TiO2 increasing, the carbon shell became thicker and the anatase TiO2 phase became more stable. The results indicate that the TiO2@C/Ag core-shell composite has excellent antibacterial activity due to the synergistic antibacterial effect of silver and TiO2.(2) ZnO@CNTs core-shell structure composite was synthesized in a closed reactor at 600℃for 8 h by using anhydrous zinc acetate as carbon source. Silver was absorbed on the surface of ZnO@CNTs core-shell composite by the chemical reduction method, and then the ZnO@CNTs/Ag core-shell composite was obtained. During the experiment, we found that the concentration of AgNO3 aqueous solution and the ultrasonic time have great influence on the loading of silver. When the AgNO3 concentration was 0.1 mol/L and the ultrasonic stirring time was 60 min, the optimal ZnO@CNTs/Ag core-shell composite was prepared. The antibacterial results indicate that ZnO@CNTs core-shell material has weak antibacterial activity owing to the photocatalysis of ZnO. However, the as-prepared ZnO@CNTs/Ag shows strong antibacterial activity.(3) Carbon microspheres were prepared via a hydrothermal method, and then activated with KOH to form activated carbon microspheres (ACMs). Copper-loaded activated carbon microspheres (Cu/ACMs) were obtained by the direct immersion in aqueous solution. It shows that when in the right concentration of Cu2+, the optimized preparation condition of Cu/ACMs is in the molar ratio of ammonia/Cu2+ =1:1. The experimental results show that the copper valence state of Cu-ACMs samples is Cu2+ion, and the amount of absorbed copper increases with the increase of copper ion concentration in solution. The addition of ammonia can significantly improve the amount of absorbed copper. The antibacterial activities of as-prepared materials were measured. The measured result indicates that the Cu/ACMs have the good activities to kill E. coli and S. aureus.(4) Cu/CMK-3 composite material was prepared by the direct immension in CuCl2 aqueous solution, using ordered mesoporous carbon (CMK-3) as a carrier, which has ordered pore structure and high specific surface area. The results show that the supported copper on CMK-3 was observed to be the bivalence state. Furthermore, pure CMK-3 has no antibacterial activity, but Cu/CMK-3 has good antibacterial activity.
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