兴奋剂
分散性
材料科学
过氧化氢
密度泛函理论
掺杂剂
涂层
氧化物
抗菌活性
冶金
纳米技术
化学
化学工程
有机化学
光电子学
细菌
高分子化学
计算化学
工程类
生物
遗传学
作者
Feng Feng,Xiao Zhang,Bin Mu,Peixia Wang,Zhensheng Chen,Jiahe Zhang,Hanfang Zhang,Jialin Zhuang,Lu Zhao,Qi An,Yihe Zhang
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2022-11-07
卷期号:5 (11): 16720-16730
被引量:7
标识
DOI:10.1021/acsanm.2c03721
摘要
The search for low-cost, highly efficient, and stable nanozymes mimicking peroxidase (POD) enzymes remains a great challenge in the development of valuable antibacterial applications. Herein, a natural attapulgite (ATP)-supported Fe and Cu oxide with mixed valences (Fe-Cu/ATP) is reported as an efficient nanozyme by a feasible impregnation method. The obtained Fe-Cu/ATP nanozyme with a large specific area and high dispersity can effectively catalyze the hydrogen peroxide (H2O2) decomposition, exhibiting enhanced POD-like activity compared with Fe/ATP, Cu/ATP, and pristine ATP. In addition, the Fe-Cu/ATP showed high stability and reusability. Through further combination with the density functional theory calculation, the electron density of the ATP surface is increased by simultaneously introducing Fe and Cu dopants. Thus, Fe-Cu/ATP possesses excellent antibacterial properties including a short-time effect depending on the POD-like activity with H2O2 and a long-term effect generated by the metal without H2O2. Finally, a coating desktop and an antibacterial fabric were delicately designed and fabricated by loading Fe-Cu/ATP onto polyethylene and a fabric surface, showing the enormous potential of Fe-Cu/ATP as building and medical functional coatings. This study provides a rational way to design natural mineral nanozymes for promising antibacterial applications.
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