【摘要】 通过酰胺化反应制备了四-2,9,16,23-氨基酞菁钴(TAPcCo)与多壁碳纳米管(MWCNTs)的复合材料,红外光谱、扫描电镜和紫外可见吸收光谱分析表明复合材料中酞菁分子与碳管之间是通过酰胺键结合的,紫外吸收光谱还表明两者之间存在着强烈的电子相互作用。同时还研究了复合材料修饰的玻碳电极对香兰素(VNL)的电催化作用。循环伏安法表明,修饰电极对VNL有着良好的电催化活性,相对于裸玻碳电极VNL在修饰电极上峰电位负移了20mV,峰电流增大了12倍,且VNL在电极表面的反应受吸附控制。方波伏安法证实了这一反应过程中有质子参与。同时,方波伏安法研究还发现:峰电流与香兰素浓度在4.2μmol·L-1～5mmol·L-1范围内呈良好的线性关系,检出限(3.3S/N)为0.44μmol·L-1。更多还原

【Abstract】 Multi-walled carbon nanotubes (MWCNTs) chemically modified by 2,9,16,23-tetraaminophthalocyaninatocobalt (TAPcCo) with amide bond (MWCNTs-TAPcCo) have been prepared and characterized by FTIR, SEM and UV-Vis spectra. An glass carbon electrode (GCE) modified by MWCNTs-TAPcCo exhibited strongly enhanced sensitivity towards the detection of vanillin (VNL), the peak potential of VNL oxidation decreased 20 mV and peak current increased 12 times compared with bare glass carbon electrode (BGCE), and the detection limit was estimated to be 0.44 μmol·L-1 at a signal-to-noise ratio of 3.3.更多还原