In recent years, the research team led by Researcher Liu Jinhuai (973 Chief Scientist) and Researcher Huang Xingjiu (Chinese Academy of Sciences “Hundred People Programâ€) of the Bionic Functional Materials and Sensors Research Center, Institute of Intelligent Research, Hefei Institute of Material Science, Chinese Academy of Sciences has been committed to exploring and developing Nanostructured pollutant rapid trace detection technology, and has achieved a series of research results.
Persistent toxic chemical pollutants (Persistent Toxic Substances, PTS) are the same as the ozone layer destruction and the greenhouse effect, and are called the three major environmental problems affecting human survival and health in the 21st century. Among the many persistent toxic chemical pollutants, persistent organic pollutants (Persistent Organic Pollutants, POPs) and heavy metal pollution are major environmental pollution problems facing us. At present, theoretical issues related to PTS pollution characteristics, distribution, migration and transformation mechanisms, evolution trends, process dynamics, bioavailability, etc. in the multi-media environment, as well as the technical principles of on-site diagnosis, control, treatment and repair, have become the research topics of international PTS. Hot spots and difficulties. However, the existing conventional detection equipment is difficult to achieve rapid trace detection.
The research team of the Institute of Intelligence aimed at the difficult problem in which PCB-based environmentally persistent organics are difficult to detect by the principle of direct electrochemical oxidation-reduction reaction, and for the first time proposed a single-walled carbon nanotube / pyrene cyclodextrin (SWCNTs / PyCD) compound Method for detecting the electrochemical AC impedance of PCB materials. The composite modified electrode has high sensitivity, and also has good stability, repeatability and selectivity. The relevant results have been published in the British "Chemical Communications" (Chemical Communications, 2011, 47, 5340-5342).
At the same time, the researchers synthesized another cyclodextrin derivative monomer to obtain a new single-walled carbon nanotube hybrid material (SWCNT-PCD), and made a single-walled carbon nanotube field effect tube electrical sensor Pieces. The device takes advantage of cyclodextrin's excellent molecular recognition, and shows excellent sensitivity and selective recognition performance for persistent organic pollutants (POPs) in nature. The sensor will be potentially used in environmental detection value. The relevant results have been published in the British "Journal of Materials Chemistry" (Journal of Materials Chemistry, 2011, DOI 10.1039 / C0JM04552G).
In addition, the researchers also constructed a series of nanostructured array electrodes using the silica nanoparticle template method and ion blotting, respectively to achieve selective detection of water pollutants trinitrotoluene and heavy metal ion mercury. The relevant results have been published in the British "Journal of Electrochemistry" (Electrochimica Acta 2010, 56, 102-107; Electrochimica Acta 2010, 56, 463-469; Analytica Chimica Acta 2011, 685, 21-28).
Relevant research work has been awarded the National Key Basic Research and Development Plan (973 Project) "Basic Research on the Application of Nanotechnology to Remove Micro Pollutants in Drinking Water" and "Basic Research on the Application of Nanomaterials for the Detection and Treatment of Traces of Persistent Toxic Pollutants" 1. Supported by the National Natural Science Foundation of China's major research program "Basic Research on Nano-manufacturing", the Chinese Academy of Sciences "Introduction of Outstanding Overseas Talents" Hundred People Program and other projects.
SWCNTsPyCD organic composite (a) Modified electrode assembly process; (b) Electrochemical impedance spectroscopy of PCB modified by the composite on PCB
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