糕点状纳米金/聚3-甲苯噻吩复合物的制备及电催化性能

Preparation and Assembly of Nano-Au/Poly-3-methylbenzene Thiophene Composites and Their Electrocatalytical Activity

为了提高非酶传感器对葡萄糖的催化性能,制备了糕点状纳米金/聚3甲基噻吩复合物并用于电极的表面修饰。反应物浓度一定,纳米金经聚3甲苯噻吩诱导,自组装成为糕点状纳米金/聚3甲苯噻吩复合物。将纳米复合物滴涂在玻碳电极表面,制得纳米金/聚3甲苯噻吩复合物修饰电极。用循环伏安法研究修饰电极对葡萄糖的电催化作用。结果表明:在0.1 mol/L NaOH溶液中,葡萄糖在修饰电极上出现明显的氧化信号,修饰电极表现出良好的电催化性能。采用方波伏安法测定葡萄糖,峰电流与葡萄糖溶液的浓度在[0.50,4.32]mmol/L呈线性关系。

In order to improve the elecrocatalytical performance of non-enzymatic sensors toward glucose, nano-Au/poly-3- methythiophene composites have been prepared by self-assembly of nano-Au induced with poly-3-methylthiophene. The nano-Au/ poly-3-methythiophene composites are used to modify the glassy carbon electrode. Electrocatalysis for glucose on the modified elec- trode is studied by cyclic vohammetry in 0.1 mol/L NaOH. The experimental results show that a significant oxidation signal is ob- served with the modified electrode, which exhibits excellent electrocatalytical performance. Square wave voltammetry is adopted to detect glucose in solution. It is found that the linear relationship between values of peak current and concentration of glucose solu- tion is ranged from 0.50 mmol/L to 4.32 mmol/L.