Hiệu suất kháng khuẩn photocatalystic của tio2 pha n phòng chống escherichia coli

• Ngôn ngữ: vie
• Thông tin xuất bản: Khoa học, 2013
• Mô tả vật lý: 86-93
• Bộ sưu tập: Metadata
• ID: 483841

Tóm tắt

Nitrogen-doped titanium dioxide (TiO2-xNx) material has been prepared using the hydrolysis method. The effect of nitrogen on the structural and optical properties of the catalyst was investigated. The antibacterial ability of synthesized N-doped TiO2 samples was evaluated using inactivated Escherichia coli (E. coli) as a model for Gram-negative bacteria under visible irradiation. Characterization results show that N-doped TiO2 samples have a broader absorption spectrum and a higher antibacterial efficiency against E. coli than pure samples. The DFT calculation suggests that nitrogen ion doping induces the formation of new states closed to the valence band leading to a narrowing of the band gap and a great improvement in photocatalystic activity in the visible light region of the doped material.