Self-doping synthesis of nano-TiO2 with outstanding antibacterial properties under visible light

被引:0
作者
Wu, Shibin [1 ,2 ,3 ,4 ]
Wang, Jingguang [1 ,2 ,3 ,4 ]
Xie, Zhenze [1 ,2 ,3 ,4 ]
Du, Chang [1 ,2 ,3 ,4 ]
机构
[1] South China Univ Technol, Dept Biomed Engn, Sch Mat Sci & Engn, Guangzhou 510006, Peoples R China
[2] South China Univ Technol, Natl Engn Res Ctr Tissue Restorat & Reconstruct, Guangzhou 510006, Peoples R China
[3] South China Univ Technol, Key Lab Biomed Mat & Engn, Minist Educ, Guangzhou 510006, Peoples R China
[4] South China Univ Technol, Innovat Ctr Tissue Restorat & Reconstruct, Guangzhou 510006, Peoples R China
关键词
Self-doping; Nano-TiO2; Visible light; Antibacterial; PHOTOCATALYTIC ACTIVITY; SILVER NANOPARTICLES; DEGRADATION; MECHANISMS; FILMS; ZNO;
D O I
10.1016/j.heliyon.2024.e32356
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Nano-TiO2 photocatalysis technology has attracted wide attention because of its safety, nontoxicity and long-lasting performance. However, traditional nano-TiO2 has been greatly limited in its application because its wide band gap can only be activated by ultraviolet light (lambda < 387 nm). In this paper, nano-TiO2 was prepared by self-doping method. The synthesized nano-TiO2 was a single anatase crystal type with a particle size of 10 nm and uniform size. In addition, nano-TiO2 has high stability and good dispersion. More importantly, nano-TiO2 exhibits excellent visible light (400-780 nm) activity due to the decrease of bandgap from 3.20 eV to 1.80 eV (less than 2.0 eV) and the presence of a large number of hydroxyl groups on the surface of the nanoparticles. In the antibacterial test, the antibacterial rate of both E.coli and S.aureus was close to 100 % under the irradiation of household low-power LED lamps, showing excellent antibacterial performance, indicating that the prepared nano-TiO2 has broad application prospects in the field of bactericidal and bacteriostatic.
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页数:10
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