首页|Tunning the bandgap of MnO2 homojunction by building active high-index facet to achieve rapid electron transfer for enhanced photocatalytic sterilization

Tunning the bandgap of MnO2 homojunction by building active high-index facet to achieve rapid electron transfer for enhanced photocatalytic sterilization

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Photocatalysis has been a research hotspot in recent years,and the design and modification of photocat-alysts have been the key points.Common methods for designing photocatalysts,including constructing heterojunctions and homojunctions,have been developed on the basis of heterojunctions.In this study,two homojunctions of manganese dioxide(MnO2),including a high-index crystal plane homojunction and a general homojunction,are prepared using a stepwise hydrothermal method.Using a capping agent,the high-index crystal surface of the MnO2 is exposed.It is found that the electron transport efficiency be-tween the two components of the homojunction with high-index planes is higher and the adsorption capacity of the oxygen is stronger,which leads to higher photocatalytic efficiency.In addition,the newly designed high-index homojunction is used for the treatment of bacterial infections,and it kills Staphy-lococcus aureus(S.aureus)and Escherichia coli(E.coli)at rates of 99.95％±0.04％and 99.31％±0.25％,respectively.It also has excellent therapeutic effects on mouse wounds,which implies superb practical application value.This work provides a new strategy for the improved design of homojunctions and the application of photocatalytic materials.

PhotocatalysisHomojunctionBandgapHigh-index facetAntibacterial

Tao Zhang、Bo Li、Chaofeng Wang、Shuilin Wu、Shengli Zhu、Hui Jiang、Yufeng Zheng、Zhaoyang Li、Zhenduo Cui、Yu Zhang、Paul K Chu、Xiangmei Liu

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Biomedical Materials Engineering Research Center,Hubei Key Laboratory of Polymer Materials,Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials,School of Materials Science and Engineering Hubei University,Wuhan 430062,China

School of Health Science & Biomedical Engineering,Hebei University of Technology,Tianjin 300401,China

School of Materials Science & Engineering,Peking University,Beijing 100871,China

School of Materials Science & Engineering,the Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China,Tianjin University,Tianjin 300072,China

Department of Orthopedics,Guangdong Provincial People's Hospital,Guangdong Academy of Medical Sciences,Guangzhou 510080,China

Department of Physics,Department of Materials Science and Engineering and Department of Biomedical Engineering,City University of Hong Kong,Hong Kong 999077,China

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国家自然科学基金国家杰出青年科学基金国家自然科学基金-广东省联合基金重点项目Central Guidance on Local Science and Technology Development Fund of Hebei Province

5217325151925104U21A2084226Z1303G

2024

10.1016/j.jmst.2023.05.059

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.168(1)
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