Herein, combined the synergetic effects and excellent adsorption of binary oxides, a novel sensor interface was designed by using porous Ce-Zr oxide nanospheres modified glassy carbon electrode (Ce-Zr oxide/GCE), which has successfully realized high sensitivity and anti-interference detection of Pb(II). The electrochemical determination of Pb(II) has been investigated by square wave anodic stripping voltammetry (SWASV) range from 0.02 to 0.5 μM, and a high sensitivity per unit area of 1666.02 μA μM⁻¹ cm⁻² was obtained with a limit of detection of 0.006 μM (3σ method). The enhancement of Pb(II) stripping signal is attributed to the excellent adsorption performance of porous Ce-Zr oxide nanospheres, which has been confirmed with X-ray photoelectron spectroscopy (XPS). Importantly, Ce-Zr oxide/GCE possesses highly anti-interference ability against the influence of Hg(II), Cd(II), Cu(II), and Zn(II) in the determination of Pb(II). Meanwhile, the remarkable stability and reproducibility were obtained. Finally, the accurate analysis of Pb(II) in wastewater collected from Wangtang sewage disposal plant was achieved. These results indicate that porous Ce-Zr oxide nanospheres are identified as promising modifier for the reliable and accurate determination of Pb(II).

本文结合二元氧化物的协同作用和优异的吸附性能，利用多孔Ce-Zr氧化物纳米球修饰玻碳电极（Ce-Zr oxide / GCE）设计了新型传感器界面，成功实现了高灵敏度和抗干扰性检测Pb（II）。已通过方波阳极溶出伏安法（SWASV）研究了Pb（II）的电化学测定，其范围为0.02至0.5μM，并且每单位面积的高灵敏度为1666.02μAμM ^-1  cm ^-2检出限为0.006μM（3σ法）。Pb（II）剥离信号的增强归因于多孔Ce-Zr氧化物纳米球的出色吸附性能，这已通过X射线光电子能谱（XPS）得以证实。重要的是，Ce-Zr氧化物/ GCE在测定Pb（II）时具有极强的抗Hg（II），Cd（II），Cu（II）和Zn（II）影响的抗干扰能力。同时，获得了显着的稳定性和可重复性。最后，对王塘污水处理厂所收集废水中的Pb（II）进行了准确分析。这些结果表明，多孔Ce-Zr氧化物纳米球被确定为可靠和准确测定Pb（II）的有前途的改性剂。