Department of Chemistry, Vijayanagara Shrikrishnadevaraya University Ballari, 583105, Karnataka, India.
Department of Chemistry, Vijayanagara Shrikrishnadevaraya University Ballari, 583105, Karnataka, India.
Anal Chim Acta. 2020 Apr 29;1108:98-107. doi: 10.1016/j.aca.2020.02.057. Epub 2020 Feb 28.
The electrocatalytic properties of tetra L-Methionine cobalt (II) phthalocyanine (CoTL-MethPc) and functionalized MWCNTs, decorated on glassy carbon electrode (GCE) was investigated. The synthesis of the CoTL-MethPc was confirmed using UV-Vis, FT-IR, XRD, TGA and MASS techniques. Successful modification of GCE with the CoTL-MethPc and their composite was also confirmed using cyclic voltammetry (CVs), differential pulse voltammetry (DPV) and chrono-amperometry (CA) techniques. CoTL-MethPc/MWCNTs/GCE was the best electrode towards nitrite and hydrogen peroxide (HO) detection with a very low detection limit (30 and 10 nmol L) by CVs method, which compared favorably with literature, good sensitivity, electrocatalytic oxidation of nitrite and hydrogen peroxide on CoTL-MethPc/MWCNTs/GCE electrode was diffusion controlled but characterized with some adsorption of electro-oxidation-reduction reaction intermediates products. The fabricated sensors are easy to prepare, cost-effective and can be applied for real sample analysis of nitrite in beetroot vegetable. The excellent electrocatalytic property of CoTL-MethPc/MWCNTs is high reproducibility, repeatability, selectivity.
四 L-蛋氨酸钴（II）酞菁（CoTL-MethPc）和功能化多壁碳纳米管在玻碳电极（GCE）上的电催化性能进行了研究。采用紫外-可见分光光度计、傅里叶变换红外光谱、X 射线衍射、热重分析和质谱技术对 CoTL-MethPc 的合成进行了确认。采用循环伏安法（CV）、差分脉冲伏安法（DPV）和计时安培法（CA）技术，成功地对 GCE 进行了 CoTL-MethPc 及其复合材料的修饰。CoTL-MethPc/MWCNTs/GCE 电极对亚硝酸盐和过氧化氢（HO）的检测具有非常低的检测限（30 和 10 nmol L），通过 CV 法进行检测，与文献相比，具有良好的灵敏度，CoTL-MethPc/MWCNTs/GCE 电极对亚硝酸盐和过氧化氢的电催化氧化是扩散控制的，但具有一些吸附电氧化还原反应中间体产物的特征。制备的传感器易于制备，具有成本效益，可用于甜菜中亚硝酸盐的实际样品分析。CoTL-MethPc/MWCNTs 的优异电催化性能具有高重现性、重复性和选择性。
