期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 198, 期 -, 页码 55-61出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.03.014
关键词
Graphene oxide; Polyethyleneimine; Gold nanoparticles; 1-Ethyl-3-[3-dimethylaminopropyl]carbodiimide; Nitrite; Hydrogen peroxidea
资金
- National Science Foundation of China [21205003, 21301009, 21105002, U1204213]
- Project of Science and Technology Department of Henan Province [122102310521, 122102210460]
- Foundation of Henan Educational Committee [13B150893]
Branched polyethylenimine (PEI) was covalently linked to graphene oxide (GO) pre-modified on glassy carbon (GC) electrode (PEI/GO/GC) via an amide bond with 1-ethyl-3-[3-dimethylaminopropyl] carbodiimide/N-hydroxysulfosuccinimide (EDC/NHS) chemistry, and gold nanoparticles was then assembled on the surface of the PEI/GO/GC electrode (Au-PEI/GO/GC) by the electroreduction of absorbed AuCl4- through electrostatic interaction. The Au-PEI/GO/GC electrode exhibited high electrocatalytic activity toward nitrite oxidation and hydrogen peroxide (H2O2) reduction. The analytical performances of the Au-PEI/GO/GC electrode demonstrated low detection limit, wider linear range, and good stability for the determination of nitrite and H2O2, which make it a promising candidate for amperometric nitrite or enzymeless H2O2 sensor. (C) 2014 Elsevier B.V. All rights reserved.
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