Ag-Fe3O4 nanozyme with peroxidase-like activity for colorimetric detection of sulfide ions and dye degradation

被引：22
|
作者：
Wang, Yong [1 ]
Ding, Yue [1 ]
Tan, Yiyun [1 ]
Liu, Xiaohui [3 ]
Fu, Lixian [1 ]
Qing, Weixia [2 ]
机构：
[1] Henan Univ, Coll Chem & Chem Engn, Henan Int Joint Lab Med Plants Utilizat, Kaifeng 475004, Peoples R China
[2] Henan Univ, Sch Basic Med Sci, Kaifeng 475004, Peoples R China
[3] Henan Univ, Sch Pharm, Kaifeng 475004, Peoples R China
来源：
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2023年 / 11卷 / 01期
关键词：
Nanozymes; Peroxidase-like activity; Colorimetric platform; Specific degradation of triarylmethane dyes; MAGNETITE NANOPARTICLES; PHOTOCATALYTIC ACTIVITY; SILVER NANOPARTICLES; ASCORBIC-ACID; CYSTEINE; HOMOCYSTEINE; ANTIOXIDANT;
D O I：
10.1016/j.jece.2022.109150
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Nanozymes based on metal are attractive substitutes to natural enzymes because of stability and low cost. At present, it is a great challenge to obtain highly active and specific metallic nanozyme for chemo-sensing and catalytic degradation toxic dye. Herein, Ag-Fe3O4 nanozymes were constructed via covalently bond to Fe3O4 using silver nanoparticles as a metal center. The peroxidase-like activity of single Ag is very weak even negli-gible. The Km value of Ag-Fe3O4 for TMB was 4.2-fold lower than that of single Fe3O4 nanozyme. Then, a TMB/ H2O2/Ag-Fe3O4 colorimetric platform was developed for sulfur ions in the linear range of 10-100 & mu;M, with a detection limit of 0.4 & mu;M. In addition, Ag-Fe3O4 nanozyme quickly and specifically catalyzed the degradation of triarylmethane dyes, and the degradation rate was more than 99%, along with good reusability more than ten -cycle run.
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页数：6
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