Chinese Journal of Applied Chemistry ›› 2022, Vol. 39 ›› Issue (6): 990-999.DOI: 10.19894/j.issn.1000-0518.210256

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Preparation of Cerium Zirconium Composite Oxide Modified Glassy Carbon Electrode and the Detection of Pb2+ in Water Samples

Qin YANG, Ning-Hua CHEN, Yu-Jie ZHANG, Zhi-Xiang YE, Ying-Chun YANG()   

  1. Department of Resources and Environment,Chengdu University of Information Technology,Chengdu 610225,China
  • Received:2021-05-26 Accepted:2021-08-29 Published:2022-06-01 Online:2022-06-27
  • Contact: Ying-Chun YANG
  • About
  • Supported by:
    the Science and Technology Department of Sichuan Province(2021ZHCG0020)


Lead is a toxic heavy metal which is widely distributed in nature and affects the ecological environment and human health. Therefore, it is of significance to detect lead ions in the environment. In this paper, a modified glassy carbon electrode is fabricated by Ce2Zr2O7.04 nanocomposites that are prepared by the hydrothermal method. Scanning electron microscope (SEM), X-ray diffractometer (XRD) and X-ray photoelectron spectroscopy (XPS) are used to characterize the composition, morphology and valence state of the as prepared materials. Square wave anodic stripping voltammetry (SWASV) is applied to detect Pb2+, and it is found that the modified electrode has a good current response to Pb2+. Meanwhile, the examined conditions such as buffer solution, deoxidization time, enrichment potential and pH are optimized. The results show that the linear range of Pb2+ is 0.0025~3.5 μmol/L, the detection limit (LOD) (3S/N) is 0.198 nmol/L, and the recovery rate is between 97.6% and 104.4% under the optimized test conditions. The method used in the determination of Pb2+ in water samples manifests good reproducibility, stability and anti-interference ability, which provides a new method for the detection of Pb2+ in water samples.

Key words: Cerium zirconium compound oxide, Modified electrode, Lead ion (Pb2+

CLC Number: