Recently, the research team of 973 Chief Scientist Liu Jinhuai of the Bionic Functional Materials and Sensors Research Center of the Institute of Intelligent Research of the Chinese Academy of Sciences Hefei Institute of Material Science and the Chinese Academy of Sciences "Introducing Outstanding Overseas Talents" Huang Xingjiu's research group innovatively proposed the selective electrochemical detection of heavy metal ions The detection strategy of "selective adsorption produces selective electrochemical response".
Heavy metal ion pollution has always been one of the major issues facing environmental safety. Among them, how to develop a rapid and highly selective method for detecting heavy metal ions has become a key link in the control and treatment of heavy metal ion pollution. The electrochemical detection method has become one of the most promising detection methods due to its fast response speed and high sensitivity. At present, methods such as biomolecular electrodes or modified electrodes by layer-by-layer chemical self-assembly are often used to improve the sensitivity and selectivity of electrochemical detection. However, these methods usually have problems such as harsh environmental requirements, poor stability, and complicated operations.
Researchers of the Institute of Intelligence Research Institute synthesized polypyrrole / reduced graphene oxide nanomaterials with selective adsorption of mercury ions. After a series of experiments, the nanomaterials were found to have a selective response to mercury ions. The adsorption process has a highly consistent correlation, which explains the electrochemical detection mechanism of "selective adsorption produces a selective electrochemical response". This study proposes new ideas for designing and constructing highly selective electrochemical sensors based on nanostructured materials, and is particularly important for revealing the role of nanostructured materials.
Related research papers have been published in the Royal Society of Chemistry's academic journal "Chem. Commun." The reviewer believes: "This work proposes a new method for the detection of toxic metal ions in water. For the first time, the adsorption performance of nanomaterials is related to the electrochemical response, which opens up a new way for the selective electrochemical detection of toxic metal ions. . This method is very reliable. "
The above research work was supported by the National Key Basic Research and Development Program (973 Project) "Basic Research on the Application of Nanotechnology to Remove Micro Pollutants in Drinking Water" and the Chinese Academy of Sciences "Introduction of Outstanding Overseas Talents" 100-Person Project.
Detection diagram
Illustration of the back cover report of "Chemical Newsletter"
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