A Z-scheme heterojunction of ZnO/CDots/C_(3)N^(4) for strengthened photoresponsive bacteria-killing and acceleration of wound healing  

作　　者：Yiming Xiang Qilin Zhou Zhaoyang Li Zhenduo Cui Xiangmei Liu Yanqin Liang Shengli Zhu Yufeng Zheng Kelvin Wai Kwok Yeung Shuilin Wu 

机构地区：[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,Wuhan 430062,China [2]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 [3]Department of Orthopaedics&Traumatology,Li KaShing Faculty of Medicine,The University of Hong Kong,Pokfulam,Hong Kong,999077,China [4]State Key Laboratory for Turbulence and Complex System and Department of Materials Science and Engineering,College of Engineering,Peking University,Beijing 100871,China

出　　处：《Journal of Materials Science & Technology》2020年第22期1-11,共11页材料科学技术（英文版）

基　　金：supported by the National Key R&D Program of China(No.2016YFC1100600 and sub-project No.2016YFC1100604);the National Science Fund for Distinguished Young Scholars(No.51925104);the National Natural Science Foundation of China(Nos.51671081 and 51871162);the Natural Science Fund of Hubei Province(No.2018CFA064);Hong Kong ITC(Nos.ITS/287/17 and GHX/002/14SZ);Health and Medical Research Fund(No.03142446);Hong Kong RGC GRF(No.17214516);RGC/NSFC(No.N HKU725-16)。

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.

关 键 词：Heterostructure Z-scheme Antibacterial Wound healing g-C3N4 

分 类 号：R318.08[医药卫生—生物医学工程]