Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 5, Issue 6, Pages 2255-2260Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am400152k
Keywords
cobalt phthalocyanine; carbon nanotubes; nitrite; electrocatalysis; sensor
Funding
- National 973 program of China [2012CB215500]
- NSFC [20973093, 21073094, 21005039, 21273116, 21201102]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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In this work, the soluble cobalt phthalocyanine functionalized multiwalled carbon nanotubes (MWCNTs) are synthesized by pi-pi stacking interaction between tetrakis (3-trifluoromethylphenoxy) phthalocyaninato cobalt(II) (CoPcF) complex and MWCNTs. The physical properties of CoPcF-MWCNTs hybrids are evaluated using spectroscopy (UV-vis,)(PS, and Raman) and electron microscopy (TEM and SEM). Subsequently, an amperometric nitrite electrochemical sensor is designed by immobilizing CoPcF-MWCNTs hybrids on the glassy carbon electrode. The immobilized CoPcF complex shows the fast electron transfer rate and excellent electrocatalytic activity for the oxidation of nitrite. Under optimum experimental conditions, the proposed nitrite electrochemical sensor shows the fast response (less than 2 s), wide linear range (9.6 x 10(-8) to 3.4 x 10(-4) M) and low detection limit (6.2 x 10(-8) M) because of the good mass transport, fast electron transfer rate, and excellent electrocatalytic activity.
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