Research progress on carbon nanotubes reinforced solid phase extraction materials of Lanzhou Institute of Chemicals

In the field of analytical chemistry, carbon nanotube-modified enrichment materials have been widely used in the pretreatment and analysis of foods, pharmaceuticals and environmental samples. Due to its light weight and small size, carbon nanotubes need to be constructed on a support to form a composite adsorbent-enriched material when used as a sample enrichment material. At present, the most commonly used construction strategies are covalent bond modification and vapor deposition, but both have disadvantages. Therefore, the development of a simple, green, and efficient construction strategy has become a research focus in the field of carbon nanotube composite adsorbent materials.

Under the support of the National Natural Science Foundation of China (No. 21405164), the team led by Yan Yanping, a researcher at the Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, combines the characteristics of small-sized carbon nanotubes, good flexibility, and porous, large pore-porous resin. Combining the properties of pores, a simple, efficient, and green carbon nanotube-enhanced macroporous resin-enriched extraction material (CNTs-MAR) and its preparation method have been innovatively developed using physical embedding strategies.

The method only uses the force of ultrasonic force and capillary force to promote the dispersion of dispersed carbon nanotubes into the pores of the macroporous resin. The use of the flexibility of the carbon nanotubes and the porous nature of the macroporous resin causes the carbon nanotubes to be blocked. The pores absorb the pores of the resin and prevent it from dissociating. They applied CNTs-MAR to the extraction of eight types and 14 natural compounds. They found that compared with the unmodified macroporous adsorption resin, the macroporous adsorption resin modified by carbon nanotubes has an excellent choice for terpenoids. Sex extraction capacity indicates that the introduction of carbon nanotubes greatly improves the selectivity and adsorption capacity of the macroporous resin.

The research work not only developed a new strategy for the construction of carbon nanotube modified supports, but also the preparation of carbon nanotube-enhanced macroporous resin-enriched materials is expected to become a highly selective sample pretreatment and analytical application. This research work was recently published on the Nanoscale, 2015, 7, 18619–18627.

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