Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (1): 20210579.doi: 10.7503/cjcu20210579

• Article • Previous Articles     Next Articles

Construction of a Coronal Polyoxometalate-based Composite Film for Determination of Nitrite

CHU Mingyue1, LI Fengbo1, GAO Ning1, YANG Xin2, YU Tingting2, MA Huiyuan1(), YANG Guixin1, PANG Haijun1   

  1. 1.School of Material Science and Chemical Engineering,Harbin University of Science and Technology,Harbin 150040,China
    2.School of Chemical Engineering,Harbin Institute of Petroleum,Harbin 150040,China
  • Received:2021-08-16 Online:2022-01-10 Published:2021-09-16
  • Contact: MA Huiyuan E-mail:mahy017@163.com
  • Supported by:
    the Natural Science Foundation of Heilongjiang Province, China(LH2019B009)

Abstract:

A composite film based on a coronal phosphotungstate K28Li5H7P8W48O184·92H2O(P8W48), CNTs and Ni nanoparticles(Ni NPs) was successfully constructed on the glassy carbon electrode(GCE) by using layer-by-layer self-assembly in conjunction with electrodeposition for determination of NO2- . The conductivity and detection signal of NO2- of the composite film were greatly increased due to the synergistic effect of the three active components, P8W48, CNTs and Ni NPs in composite film. Under the optimized conditions, the as-prepared sensor exhibited impressive sensing performance with a widely linear range from 1.25 μmol/L to 2500 μmol/L and a low detection limit(LOD) of 0.02 μmol/L. The good selectivity was confirmd in presence of several possible co-existing substances. The applica-bility of the method was investigated by determination of NO2- in fruit juice with a satisfied recovery. This composite sensor is promising for highly sensitive determination of NO2- in real application.

Key words: Polyoxometalate, Nickel nanoparticles, Carbon nanotubes, Nitrite

CLC Number: 

TrendMD: