Xiong Shiquan research group of Institute of technology and biology of Chinese Academy of Sciences has made new progress in detection and analysis of heavy metal ions

Heavy metal pollution is harmful to human health, so it is of great scientific significance to study the detection and mechanism of heavy metal ions Recently, Xiong Shiquan research group of Institute of technology, biology and agricultural engineering, Hefei Institute of material science, Chinese Academy of Sciences constructed composite electrode materials with graded structure γ - AlOOH / Fe (OH) 3 and ionic liquid to realize the analysis of Hg (II) and Cu (II) ions This work has a certain reference value for the detection and analysis of various heavy metal ions in the environment Relevant research results have been published on electrochia Acta (electrochia Acta, 2018, 287, 87) In the electrochemical detection of heavy metal ions, most of the research is to detect one or several ions In this study, the research group used efficient graded materials to construct electrodes, not only to realize the detection and analysis of heavy metal ions, but also to further analyze the mutual interference of several ions, and to clarify the reasons for the difference between sensitivity and detection limit when detecting heavy metal ions alone and simultaneously Using ionic liquid / γ - AlOOH / Fe (OH) 3 complex to construct electrode materials, the researchers solved the problems of weak conductivity and low detection limit by optimizing parameters and a series of material characterization Further experimental results show that the detection limits of Cu (II) and Hg (II) can reach 0.5 and 0.2nm, and the sensitivity can reach 64.5 and 65.9 μ A / μ m, respectively At the same time, the researchers detected Hg (II) and Cu (II) separately and simultaneously, and found that the sensitivity and detection limit of the two tests changed in varying degrees On this basis, the detection limit and sensitivity of Hg (II) and Cu (II) were analyzed and studied, and the reason for the change of detection effect of Hg (II) and Cu (II) was explained experimentally The researchers have tested the heavy metal ions in the soil and achieved good results This study designed a new method to construct electrode materials, and also provided a reference for the detection and analysis of many heavy metal ions The above research work is supported by the natural science foundation of Anhui Province, the National Natural Science Foundation and the joint fund of Institute of technology and biology.