A Z-scheme heterojunction of ZnO/CDots/C3N4 for strengthened photoresponsive bacteria-killing and acceleration of wound healing

被引：5

作者：

Yiming Xiang ^{[1
,2
,3
]}

Qilin Zhou ^{[1
]}

Zhaoyang Li ^{[2
]}

Zhenduo Cui ^{[2
]}

Xiangmei Liu ^{[1
]}

Yanqin Liang ^{[2
]}

Shengli Zhu ^{[2
]}

Yufeng Zheng ^{[4
]}

Kelvin Wai Kwok Yeung ^{[3
]}

Shuilin Wu ^{[1
,2
]}

机构：

[1] Hubei Key Laboratory of Polymer Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials,School of Materials Science & Engineering, Hubei University

[2] The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, School of Materials Science & Engineering,Tianjin University

[3] Department of Orthopaedics & Traumatology, Li Ka Shing Faculty of Medicine, The University of Hong Kong

[4] State Key Laboratory for Turbulence and Complex System and Department of Materials Science and Engineering, College of Engineering, Peking University

来源：

Journal of Materials Science & Technology | 2020年 / 57卷 / 22期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

D O I：

暂无

中图分类号：

R318.08 [生物材料学];

学科分类号：

0805 ; 080501 ; 080502 ;

摘要：

The abuse of antibiotics is leading to the emergence of resistant bacteria. In this work, a drug-free composite of ZnO/CDots/g-CNwith Z-scheme heterojunction was developed, which was employed to kill bacteria effectively within a very short time under the irradiation of visible light due to the enhanced photocatalytic and photothermal effects. In this system, the CDots acted as a bridge between g-CNand ZnO, effectively inhibiting the recombination of photo-generated electrons with holes and consequently enhancing the photocatalytic properties. In addition, CDots endowed the system with excellent photothermal effects. As a result, the antibacterial efficacy of ZnO/CDots/g-CNcomposite against S. aureus and E. coli reached up to 99.97 % and 99.99 % respectively, after 15 min of visible light irradiation, due to the synergistic action of photo-inspired radical oxygen species and hyperthermia. The Zn ions released from the composite promoted the growth of fibroblasts, which accelerated the wound healing process.

引用

页码：1 / 11

页数：11

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