Visible-Light Active Titanium Dioxide Nanomaterials with Bactericidal Properties

Liao, Chengzhu1; Li, Yuchao2; Tjong, Sie Chin3

2020-01

10.3390/nano10010124

Nanomaterials   影响因子和分区

2079-4991

2079-4991

This article provides an overview of current research into the development, synthesis, photocatalytic bacterial activity, biocompatibility and cytotoxic properties of various visible-light active titanium dioxide (TiO2) nanoparticles (NPs) and their nanocomposites. To achieve antibacterial inactivation under visible light, TiO2 NPs are doped with metal and non-metal elements, modified with carbonaceous nanomaterials, and coupled with other metal oxide semiconductors. Transition metals introduce a localized d-electron state just below the conduction band of TiO2 NPs, thereby narrowing the bandgap and causing a red shift of the optical absorption edge into the visible region. Silver nanoparticles of doped TiO2 NPs experience surface plasmon resonance under visible light excitation, leading to the injection of hot electrons into the conduction band of TiO2 NPs to generate reactive oxygen species (ROS) for bacterial killing. The modification of TiO2 NPs with carbon nanotubes and graphene sheets also achieve the efficient creation of ROS under visible light irradiation. Furthermore, titanium-based alloy implants in orthopedics with enhanced antibacterial activity and biocompatibility can be achieved by forming a surface layer of Ag-doped titania nanotubes. By incorporating TiO2 NPs and Cu-doped TiO2 NPs into chitosan or the textile matrix, the resulting polymer nanocomposites exhibit excellent antimicrobial properties that can have applications as fruit/food wrapping films, self-cleaning fabrics, medical scaffolds and wound dressings. Considering the possible use of visible-light active TiO2 nanomaterials for various applications, their toxicity impact on the environment and public health is also addressed.

antibacterial activity photocatalyst titania nanomaterial doping Staphylococcus aureus Escherichia coli reactive oxygen species silver nanoparticle visible light

SCI

英语

第一 ; 通讯

Natural Science Foundation of Shandong Province, China[ZR2019MB053]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000516825600124

MDPI

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
2.Liaocheng Univ, Dept Mat Sci & Engn, Liaocheng 252000, Shandong, Peoples R China
3.City Univ Hong Kong, Dept Phys, Kowloon, Tat Chee Ave, Hong Kong 999077, Peoples R China

Liao, Chengzhu,Li, Yuchao,Tjong, Sie Chin. Visible-Light Active Titanium Dioxide Nanomaterials with Bactericidal Properties[J]. Nanomaterials,2020,10(1).

Liao, Chengzhu,Li, Yuchao,&Tjong, Sie Chin.(2020).Visible-Light Active Titanium Dioxide Nanomaterials with Bactericidal Properties.Nanomaterials,10(1).

Liao, Chengzhu,et al."Visible-Light Active Titanium Dioxide Nanomaterials with Bactericidal Properties".Nanomaterials 10.1(2020).