WANG Pei-yao,ZHANG Ling-yi,ZHANG Wei-bing.Preparation of a Novel Peroxide-like Nanozyme NC@MIL-100(Fe) and Its Application in Biothiols Analysis[J].Journal of Instrumental Analysis,2022,41(08):1121-1129.
WANG Pei-yao,ZHANG Ling-yi,ZHANG Wei-bing.Preparation of a Novel Peroxide-like Nanozyme NC@MIL-100(Fe) and Its Application in Biothiols Analysis[J].Journal of Instrumental Analysis,2022,41(08):1121-1129. DOI: 10.19969/j.fxcsxb.22021901.
Preparation of a Novel Peroxide-like Nanozyme NC@MIL-100(Fe) and Its Application in Biothiols Analysis
Enzyme-catalyzed reactions are characteristic of high selectivity and high efficiency.Specially designed metal-organic frameworks(MOFs) have catalytic activities similar to natural enzymes,and their porous structures also provide a large number of active sites for catalytic reactions.In this paper,a novel nanozyme NC@MIL-100(Fe) was prepared based on the electrostatic interaction between needle coke(NC) and MOF material(MIL-100(Fe)),which was applied to the analytical methods development of biothiols.The inherent enzyme-like activity of NC was made full use for the new material,whose lamellar structure could effectively avoid the agglomeration phenomenon of MIL-100(Fe),improving the overall catalytic effect of the material.Compared with needle coke and MIL-100(Fe),NC@MIL-100(Fe) as nanozyme has a stronger affinity for the substrate and a faster reaction rate,thus showing a better peroxidase-like catalytic activity.Its performance was evaluated with 3,3′,5,5′-tetramethylbenzidine(TMB) and H,2,O,2, as substrates,and the Michaelis constants(,K,m,) obtained were 0.27 mmol/L and 0.43 mmol/L,respectively,which were 1.61 times and 8.6 times smaller than that of horseradish peroxidase.The material was applied to the development of analytical methods for glutathione and cysteine,with the linear ranges of 3-70 μmol/L and 1-80 μmol/L,and the detection limits of 0.33 μmol/L and 0.22 μmol/L,respectively,showing the advantages of wide linear range,low detection limit and good selectivity.Furthermore,this material was successfully applied to the detection of biothiols concentration in human serum with satisfactory results.
关键词
纳米酶针状焦MIL-100(Fe)谷胱甘肽半胱氨酸
Keywords
nanozymeneedle cokeMIL-100(Fe)glutathionecysteine
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