材料科学技术(英文版)2024，Vol.168Issue(1) ：265-275.DOI:10.1016/j.jmst.2023.05.059

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

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
材料科学技术(英文版)2024，Vol.168Issue(1) ：265-275.DOI:10.1016/j.jmst.2023.05.059
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Tunning the bandgap of MnO2 homojunction by building active high-index facet to achieve rapid electron transfer for enhanced photocatalytic sterilization

Tao Zhang 1Bo Li 1Chaofeng Wang 2Shuilin Wu 3Shengli Zhu 4Hui Jiang 4Yufeng Zheng 3Zhaoyang Li 4Zhenduo Cui 4Yu Zhang 5Paul K Chu 6Xiangmei Liu7
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作者信息

  • 1. 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
  • 2. School of Health Science & Biomedical Engineering,Hebei University of Technology,Tianjin 300401,China
  • 3. School of Materials Science & Engineering,Peking University,Beijing 100871,China
  • 4. 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
  • 5. Department of Orthopedics,Guangdong Provincial People's Hospital,Guangdong Academy of Medical Sciences,Guangzhou 510080,China
  • 6. Department of Physics,Department of Materials Science and Engineering and Department of Biomedical Engineering,City University of Hong Kong,Hong Kong 999077,China
  • 7. 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
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Abstract

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.

Key words

Photocatalysis/Homojunction/Bandgap/High-index facet/Antibacterial

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基金项目

国家自然科学基金(52173251)

国家杰出青年科学基金(51925104)

国家自然科学基金-广东省联合基金重点项目(U21A2084)

Central Guidance on Local Science and Technology Development Fund of Hebei Province(226Z1303G)

出版年

2024
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)

CSTPCDCSCD
影响因子：0.657
ISSN：1005-0302
参考文献量61
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