Superimposed surface plasma resonance effect enhanced the near-infrared photocatalytic activity of Au@Bi2WO6 coating for rapid bacterial killing

Bo Li; Lei Tan; Xiangmei Liu; Zhaoyang Li; Zhenduo Cui; Yanqin Liang; Shengli Zhu; Xianjin Yang; Kelvin Wai Kwok Yeung; Shuilin Wu

doi:10.1016/j.jhazmat.2019.120818

Superimposed surface plasma resonance effect enhanced the near-infrared photocatalytic activity of Au@Bi₂WO₆ coating for rapid bacterial killing

J Hazard Mater. 2019 Dec 15:380:120818. doi: 10.1016/j.jhazmat.2019.120818. Epub 2019 Jul 4.

Authors

Affiliations

¹ Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, China.
² Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, China. Electronic address: liuxiangmei1978@163.com.
³ The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, China.
⁴ Department of Orthopaedics & Traumatology, Li KaShing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong 999077, China.
⁵ Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, China; The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, China. Electronic address: shuilinwu@tju.edu.cn.

PMID: 31310928
DOI: 10.1016/j.jhazmat.2019.120818

Abstract

Bacterial infection has become a serious public health challenge because the misuse of antibiotics worldwide has induced bacterial resistance and superbug occurrences, that is, no suitable antibiotics are available. Herein, we design a new infrared photocatalytic system on titanium (Ti) substrates, and it consists of gold (Au) nanorod-decorated bismuth tungstate (Bi₂WO₆) nanosheets (Au@Bi₂WO₆). The surface plasmon resonance (SPR) effect induced by near infrared (NIR) facilitates partial photo-induced electron transfer between Au and Bi₂WO₆, resulting in accelerated charge transmission and consequently hindering electron-hole recombination, which imparts high photocatalytic property to the coating. In addition, the superimposed SPR from both Au and Bi₂WO₆ can improve the photothermal effect of Au@Bi₂WO₆. As a result, when irradiated with 808 nm NIR for 15 min, this hybrid coating exhibits a superior antibacterial efficiency of 99.96% and 99.62% against Escherichia coli and Staphylococcus aureus, respectively, due to the synergistic effects of high yield of radical oxygen species and hyperthermia; this efficiency cannot be achieved by either Au-Ti or Bi₂WO₆-Ti alone. This platform exhibits a great potential for noninvasive disinfection without using antibiotics.

Keywords: Antibacterial; Photocatalytic; Surface plasmon resonance; Two-dimensional materials.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Anti-Bacterial Agents / pharmacology*
Bismuth / chemistry*
Catalysis
Escherichia coli / drug effects*
Escherichia coli / radiation effects*
Gold / chemistry*
Infrared Rays*
Microscopy, Electron, Scanning / methods
Oxides / chemistry*
Staphylococcus aureus / drug effects*
Staphylococcus aureus / radiation effects*
Surface Plasmon Resonance / methods*
Tungsten / chemistry*

Substances

Anti-Bacterial Agents
Oxides
Gold
tungsten oxide
Bismuth
Tungsten