Abstract
AbstractThe composite of carbon nanotube (CNT) and phenolic resin was prepared in a piece of fused silica capillary based on the far infrared‐assisted crosslinking of phenolic novolac resin in the presence of CNTs and hexamethylenetetramine for electrochemical sensing. The surface morphology and structure of the prepared materials were investigated by scanning electron microscopy, energy dispersive X‐ray spectroscopy and Fourier transform infrared spectroscopy. The results indicated that CNTs in the composite was adhered by the crosslinked phenolic resin to form an electrically conductive network. Many broken ends of CNTs appeared on the surface of the composite electrode in the form of a nanoelectrode array. The novel electrode was employed in the amperometric detection of synephrine and hesperidin in Citri Reticulatae Pericarpium in combination with capillary zone electrophoresis. The novel CNT‐based electrode owned the advantages of high sensitivity, low fabrication expense and excellent electrocatalytic performances, indicating great promise for the electrochemical detection in other analysis systems.
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