对苯二酚
催化作用
检出限
纳米材料
化学
过氧化物酶
组合化学
纳米技术
人工酶
无机化学
材料科学
有机化学
酶
色谱法
作者
Ye Ma,Miao Zhu,Qian He,Minggang Zhao,Hongzhi Cui
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2022-04-21
卷期号:10 (17): 5651-5658
被引量:25
标识
DOI:10.1021/acssuschemeng.2c00621
摘要
Artificial oxidase and peroxidase mimics that are based on nanomaterials have drawn enormous attention due to their high stability, high efficiency, and low cost as compared with natural enzymes. Achieving multifunction and further boosting catalytic efficiency are two key directions of future nanozyme development. In this work, NiCo2O4@MnO2 microcubes with p–n junctions were constructed, exhibiting both oxidase- and peroxidase-like activities, capable of catalyzing the oxidation of tetramethylbenzidine (TMB) in the presence of O2 or H2O2. More importantly, such catalytic activity can be dramatically enhanced through illumination due to the in-build p–n junctions and the consequent photoelectric effect. As a prototype, NiCo2O4@MnO2 was utilized in a colorimetric assay to detect trace hydroquinone. An outstanding lowest detection limit of 0.042 μM is achieved, and the recovery in real water samples ranges from 99.87 to 101.10%. The dual enzyme-mimetic and photoenhanced catalytic activities render the nanozyme promising for various applications in sensors and catalysts.
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