Synthesis of reduced graphene oxide-iron nanoparticles with superior enzyme-mimetic activity for biosensing application

被引:43
|
作者
Li, Lili [1 ]
Zeng, Chunmei [1 ]
Ai, Lunhong [1 ]
Jiang, Jing [1 ]
机构
[1] China West Normal Univ, Coll Chem & Chem Engn, Chem Synth & Pollut Control Key Lab Sichuan Prov, Nanchong 637002, Peoples R China
基金
中国国家自然科学基金;
关键词
Iron nanoparticles; Reduced graphene oxide; Peroxidase-like activity; H2O2; Glucose; PEROXIDASE-LIKE ACTIVITY; CORE-SHELL STRUCTURE; COLORIMETRIC DETECTION; ARTIFICIAL ENZYMES; MAGNETIC NANOPARTICLES; CATALYTIC-ACTIVITY; GLUCOSE DETECTION; ROOM-TEMPERATURE; GRAPHITE OXIDE; RAMAN-SPECTRA;
D O I
10.1016/j.jallcom.2015.03.176
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Development of enzyme-mimetic catalysts with sustainability and environmental benignancy has gained considerable attention with the growing demands for large-scale applications in recent years. Here, we demonstrate that the reduced graphene oxide (RGO)-iron nanoparticles (INs) can be utilized as the highly active and cost-effective enzyme-mimetic catalysts for the first time, which have been successfully synthesized by a facile iron-self-catalysis process at room temperature. Benefitting from synergetic effects between RGO and INs, the RGO-INs could efficiently catalyze the oxidization of 3,3',5,5'-tetramethylbenzidine (TMB) in the presence of H2O2 to produce a typical color reaction, showing the much better peroxidase-like activity than that of each individual part. The mechanistic insight into the enhanced peroxidase-like activity of the RGO-INs was investigated systematically. On the basis of the enzyme-mimetic activity of the RGO-INs, the simple, sensitive, selective and cost-effective colorimetric assays for the detection of hydrogen peroxide and glucose with naked eyes were successfully established. The RGO-INs showed several prominent advantages, such as facile preparation, low cost, tunability in catalytic activity, and low detection limit, over natural peroxidase or other nanomaterial-based alternatives, holding great potential as enzymatic mimics for biosensing applications. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:470 / 477
页数:8
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