Ultra Sensitive Voltammetric Determination of Hydrazine with Curcumin - Ordered Mesoporous Carbon Composite as Sensing Material

With curcumin - ordered mesoporous carbon (CM - OMC) composite as sensing material, an ultra sensitive voltammetric sensor toward hydrous hydrazine determination was developed and evaluated. The morphology of the present CM-OMC showed that after electro-deposition, OMC was partially coated by CM, which may led to an enhanced electro-catalytic ability of CM-OMC compared with CM or OMC. Electrochemical evaluations, including cyclic voltammograms (CVs) and amperometric i-t technique showed that the present sensor displayed excellent electrocatalytic activity towards hydrazine electrochemical oxidation. A linear relationship between the oxidation peak current and hydrazine concentration was obtained in the range of 12.5 to 225 mu molL(-1) with a correlation coefficient of 0.998 using the amperometric detection technique. The sensitivity and detection limit were determined to be 10.54 nA mu molL(-1) and 0.39 sigma molL(-1), respectively. The present electro-catalytic method was expected to be widely used due to its simplicity, low cost, high sensitivity, and fast response for the detection of hydrous hydrazine.