介孔炭材料修饰电极的制备及其应用研究.docVIP

介孔炭修饰电极的制备及其研究 郑建谋﹙西安文理学院化学与化，西安710065 2南水北调中线干线工程建设管理局河北直管项目建设管理部，石家庄 050035﹚ 摘 要：本文制备了介孔炭材料修饰玻碳电极，采用循环伏安法，对对苯二酚( HQ )在该修饰电极上的电化学行为进行了研究，与HQ在裸玻碳电极上的电化学响应相比，HQ在该修饰电极上的氧化峰电流大大增加，且HQ的氧化峰电位降低，表明该修饰电极对HQ具有良好的电催化作用。HQ在修饰电极上在1.0×10-6～1.0×10-4 mol/L范围内与峰电流ip呈现良好的线性关系，据此建立了检测HQ的电化学分析方法。 关键词：介孔炭；电极；对苯二酚；电化学行为 The Preparation of Mesoporous Carbon Materials Modified Glassy Carbon Electrode and Investigation of It’s Electrochemical Properties QU Ying-juan, XUE Wei, LI Jiang-tao, ZHENG Jian-mou (1 School of Chemistry Chemical Engineering, Xian University of Arts and Sciences, Xi’an 710065, China; 2 Hebei Department of Construction Management of Mid-line Project of South-to-north Water Diversion, Shijiazhuang 050035, China) Abstract: In this paper, the conditions of preparation the mesoporous carbon modified glassy carbon electrode were studied. It was found that the modified electrode had effective catalytic activity to the hydroquinone ( HQ ) and the electrochemical behaviors of HQ on the modified electrode were studied. Compared to the naked glassy carbon electrode, the oxidative peak and reductive peak of HQ were greatly enhanced on this modified electrode. The concentration of HQ in the range of 1.0×10-6～1.0×10-4 mol/L had a good linear relationship between electrochemical response signals and HQ concentration with a detection limit of 4×10-7 mol/L (S/N=3). This method can be applied to determine the HQ sample with high accuracy and reproducibility. Keywords: Mesoporous carbon; Modified electrode; Hydroquinone; Electrochemical behavior 对苯二酚( HQ )为白色结晶，成人误服1g，即可出现头痛、头晕、耳鸣、面色苍白、恶心、呕吐、腹痛、窒息感、呼吸困难等症状，严重者可出现呕血、血尿和溶血性黄疸，甚至危及生命加之近年来，对苯二酚的应用领域还在逐渐拓宽，与人们的生活联系更加紧密[。因此，对于对苯二酚的检测显得尤为重要，建立对苯二酚的检测方法也具有一定的现实意义。 目前已报道的HQ的主要测定方法有电化学方法[]和少数其它的分析方法如分光光度法[8~9]等，由于HQ具有电化学活性容易被氧化，因此电化学HQ的电化学方法较多，但是研究对苯二酚的测定方法介孔炭炭炭[10~13]。本文壳聚糖为分散剂，将介孔炭MC）分散后涂覆在玻碳电极（GC）表面制得MC修饰电极，HQ在该MC修饰电极电化学行为进行了研究HQ的电化学分析方法，该方法电极制备简单易行，可用于HQ的测定。 实验部分 .1 主要仪器与试剂 CHI600C电化学工作站（上海辰华仪器公司）；三电极体系：玻碳电极（GCE）为工作电极，饱和为参比电极，辅助电极为铂丝电