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

被引：87

作者：

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

Zhou, Qilin ^{[1
]}

Li, Zhaoyang ^{[2
]}

Cui, Zhenduo ^{[2
]}

Liu, Xiangmei ^{[1
]}

Liang, Yanqin ^{[2
]}

Zhu, Shengli ^{[2
]}

Zheng, Yufeng ^{[4
,5
]}

Yeung, Kelvin Wai Kwok ^{[3
]}

Wu, Shuilin ^{[1
,2
]}

机构：

[1] Hubei Univ, Sch Mat Sci & Engn, Hubei Key Lab Polymer Mat, Minist Educ,Key Lab Green Preparat & Applicat Fun, Wuhan 430062, Peoples R China

[2] Tianjin Univ, Sch Mat Sci & Engn, Key Lab Adv Ceram & Machining Technol, Minist Educ China, Tianjin 300072, Peoples R China

[3] Univ Hong Kong, Li KaShing Fac Med, Dept Orthopaed & Traumatol, Pokfulam, Hong Kong 999077, Peoples R China

[4] Peking Univ, Coll Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China

[5] Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2020年 / 57卷

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Heterostructure; Z-scheme; Antibacterial; Wound healing; g-C3N4; GRAPHITIC CARBON NITRIDE; VISIBLE-LIGHT; PHOTOCATALYTIC ACTIVITY; CO2; ANTIBACTERIAL; NANOCOMPOSITES; DEGRADATION; G-C3N4; TUMOR; WATER;

D O I：

10.1016/j.jmst.2020.05.016

中图分类号：

T [工业技术];

学科分类号：

08 ;

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-C3N4 with 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-C3N4 and 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-C3N4 composite 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. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

引用

页码：1 / 11

页数：11

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