期刊
ELECTROCHIMICA ACTA
卷 56, 期 27, 页码 9769-9774出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.08.026
关键词
Calcined layered double hydroxides (CLDHs); Gold nanoparticles (AuNPs); Nitrite; Non-enzymatic
资金
- National Natural Science Foundation of China [201075078]
- Natural Science Foundation of Shandong Province, China [ZR.2010BM005]
In this paper, a novel nitrite sensor was constructed based on electrodeposition of gold nanoparticles (AuNPs) on a copper calcined layered double hydroxide (Cu-CLDH) modified glassy carbon electrode. Electrochemical experiments showed that AuNPs/CLDH composite film exhibited excellent electrocatalytic oxidation activity with nitrite due to the synergistic effect of the Cu-CLDH with AuNPs. The fabricated sensor exhibited excellent performance for nitrite detection within a wide concentration interval of 1-191 mu M and with a detection limit of 0.5 mu M. The superior electrocatalytic response to nitrite was mainly attributed to the large surface area, minimized diffusion resistance, and enhanced electron transfer of the Cu-CLDH and AuNPs composition film. This platform offers a novel route for nitrite sensing with wide analytical applications and will supply the practical applications for a variety of simple, robust, and easy-to-manufacture analytical approaches in the future. (C) 2011 Elsevier Ltd. All rights reserved.
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