Wu Shibin, Wang Jingguang, Xie Zhenze, Du Chang
Department of Biomedical Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, PR China.
National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, 510006, PR China.
Heliyon. 2024 Jun 13;10(12):e32356. doi: 10.1016/j.heliyon.2024.e32356. eCollection 2024 Jun 30.
Nano-TiO photocatalysis technology has attracted wide attention because of its safety, nontoxicity and long-lasting performance. However, traditional nano-TiO has been greatly limited in its application because its wide band gap can only be activated by ultraviolet light (λ < 387 nm). In this paper, nano-TiO was prepared by self-doping method. The synthesized nano-TiO was a single anatase crystal type with a particle size of 10 nm and uniform size. In addition, nano-TiO has high stability and good dispersion. More importantly, nano-TiO 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-TiO has broad application prospects in the field of bactericidal and bacteriostatic.
纳米二氧化钛光催化技术因其安全、无毒和持久的性能而备受关注。然而，传统的纳米二氧化钛因其宽带隙只能被紫外光（λ < 387 nm）激活，在应用中受到很大限制。本文采用自掺杂法制备了纳米二氧化钛。合成的纳米二氧化钛为单一锐钛矿晶型，粒径为10 nm，尺寸均匀。此外，纳米二氧化钛具有高稳定性和良好的分散性。更重要的是，由于带隙从3.20 eV降低到1.80 eV（小于2.0 eV）以及纳米颗粒表面存在大量羟基，纳米二氧化钛表现出优异的可见光（400 - 780 nm）活性。在抗菌测试中，在家庭低功率LED灯照射下，大肠杆菌和金黄色葡萄球菌的抗菌率均接近100%，表现出优异的抗菌性能，表明所制备的纳米二氧化钛在杀菌抑菌领域具有广阔的应用前景。
