Characterization and Photonic Effect of Novel Ag-CNT/TiO2 Composites and their Bactericidal Activities

摘要

A novel composite (Ag-CNT/TiO2) of silver treated carbon nanotubes (Ag-CNT) and TiO2 was synthesized via wet chemistry followed by a heat treatment. The dispersion and structure of the silver in the synthesized composites determined by X-ray diffraction (XRD), energy dispersive X-ray (EDX) spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy(TEM). XRD patterns of the composites showed that the composites contained a mixing anatase and rutile phase. The EDX spectra showed the presence of C, O, Ti and Ag peaks. The TiO2 particles were distributed uniformly in the CNT network, and silver particles were virtually fixed on the surface of the tube. The photo-catalysis degraded behaviors of the Ag-CNT/TiO2 composites of the methylene blue, which increased with an increase of the silver component. The Ag-CNT/TiO2 composites have excellent antibacterial activities against Escherichia coli (E. Coli), Pseudomonas aeruginosa (P. Aeru) and Bacillus subtilis (B. Sub) under visible light.