利用纳米钯/β-环糊精复合物修饰镍钢电极(Pd/β-CD/TCh/Ni-Fe)制备了2,6-二氯苯酚(2,6-DCP)传感器.修饰电极的制备通过三个步骤:采用电化学方法将带正电的硫胆碱共价修饰到镍钢表面(TCh/Ni-Fe)；将β-环糊精(β-CD)通过静电吸附自组装在TCh/Ni-Fe表面(β-CD/TCh/Ni-Fe)；通过双电位阶跃法,将纳米钯沉积在β-CD/TCh/Ni Fe表面.采用场发射扫描电镜、X-晶体衍射、X-射线光电子能谱及电化学技术表征了该修饰电极的特性.结果显示:纳米钯呈麦穗状,均匀地沉积在电极表面,粒径为17.2±4 nm.Pd/β-CD/TCh/Ni-Fe电极对2,6-DCP的氧化还原有较强的电催化作用,在1×10-6～1×10-4 mol·L-1的浓度范围内,2,6-DCP的氧化峰电流与其浓度呈良好的线性增长关系[i(A)=2.8×10-3+11.9 Cx(mol·L-1),R=0.996,检测限:1×10-9 mol·L- 1(3σ)].
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