Jiangsu Key Laboratory of Power Batteries, Laboratory of Electrochemistry, School of Chemistry and Materials Science, Nanjing Normal University, 1# Wenyuan Road, Nanjing 210023, PR China.
ACS Appl Mater Interfaces. 2013 Mar;5(6):2255-60. doi: 10.1021/am400152k. Epub 2013 Mar 14.
In this work, the soluble cobalt phthalocyanine functionalized multiwalled carbon nanotubes (MWCNTs) are synthesized by π-π 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, XPS, 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 × 10(-8) to 3.4 × 10(-4) M) and low detection limit (6.2 × 10(-8) M) because of the good mass transport, fast electron transfer rate, and excellent electrocatalytic activity.
在这项工作中，通过四（3-三氟甲氧基苯氧基）酞菁钴（II）（CoPcF）配合物与多壁碳纳米管（MWCNTs）之间的π-π堆积相互作用合成了可溶性钴酞菁功能化多壁碳纳米管（MWCNTs）。使用光谱（UV-vis、XPS 和 Raman）和电子显微镜（TEM 和 SEM）评估了 CoPcF-MWCNTs 杂化物的物理性质。随后，通过将 CoPcF-MWCNTs 杂化物固定在玻碳电极上，设计了安培型亚硝酸盐电化学传感器。固定化的 CoPcF 配合物对亚硝酸盐的氧化表现出快速的电子转移速率和优异的电催化活性。在最佳实验条件下，由于良好的传质、快速的电子转移速率和优异的电催化活性，所提出的亚硝酸盐电化学传感器具有快速的响应（小于 2 s）、宽线性范围（9.6×10(-8)至 3.4×10(-4) M）和低检测限（6.2×10(-8) M）。
