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    Home > Chemicals Industry > New Chemical Materials > Academician Zhao Dongyuan of Fudan University "ACS Nano": Accurate vertical arrangement of mesoporous carbon films for efficient electrochemical transfer

    Academician Zhao Dongyuan of Fudan University "ACS Nano": Accurate vertical arrangement of mesoporous carbon films for efficient electrochemical transfer

    • Last Update: 2021-07-11
    • Source: Internet
    • Author: User
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    For example, two-dimensional carbon materials such as graphene have different physical and chemical properties due to their larger lateral dimensions and specific molecular structure
    .
    Among them, mesoporous carbon membranes with high specific surface area, large pore volume and excellent electrical conductivity are widely used in many fields such as catalysis, energy storage and sensing
    .
    Thanks to the ultra-high aspect ratio, it is believed that constructing a high-permeability two-dimensional film and processing it at an appropriate time is a necessary condition for its full potential
    .
    Thanks to the high accessibility of the vertical mesoporous structure, scholars have been committed to constructing a vertically oriented mesoporous structure to achieve polymer regulation and direct transportation
    .
    However, the current strategy of mainly relying on electrochemical assistance, strong magnetic field or other external auxiliary means to construct oriented mesoporous membranes with large vertical mesoporous channels is not satisfactory
    .
    Researchers have developed a block copolymer self-assembly method to prepare two-dimensional mesoporous materials, which can form oriented mesoporous channels without the help of external forces
    .
    This method has been further extended to prepare mesoporous structures with various orientations, such as dendritic and trapezoidal mesopores
    .
    In addition, there are some methods of polymer phase separation, but these methods are limited to the use of silicon dioxide or insulating polymer materials, which makes the mesoporous carbon film prepared in this way have poor conductivity and limits the exploration in the electrochemical direction
    .
    Most importantly, there is no synthesis method to obtain a vertical mesoporous membrane with ultra-high controllability at the single micelle level, mainly due to their strict requirements and insufficient understanding of self-assembly procedures
    .
    In summary, it is very necessary to accurately prepare an ordered mesoporous carbon film with a vertical mesoporous structure and excellent conductivity through a simple and controllable method
    .
    ? Recently, the research group of Academician Zhao Dongyuan of Fudan University designed a simple and universal single micelle assembly method for precise control of the synthesis of centimeter-level vertical ordered mesoporous carbon films on a variety of substrates
    .
    This vertical mesoporous structure can be assembled at the solid-liquid interface, using an amphiphilic triblock copolymer as a template, dopamine as a carbon source, and trimethylbenzene as a fusion agent and swelling agent, and mediate single-molecule micellar fusion Cylindrical micelles
    .
    The mesoporous carbon film prepared by this method has excellent high mesoporosity, high specific surface area (472 m2g-1), and the pore size reaches 9.
    1nm
    .
    This directional assembly process can be highly regulated at the single micelle level, so as to achieve precise thickness control of mesopores from single layer to multilayer, and pore diameter control from 8.
    4 to 13.
    5 nm
    .
    Compared with traditional porous carbon membrane sensors, carbon membranes with vertical mesoporous channels have high permeability, thus exhibiting a lower detection limit (50 nmolL-1) and higher dopamine detection sensitivity
    .
    And this method is universal, applicable to a variety of substrates and materials, and has more potential applications, such as filtration, sensing, and catalysis
    .
    This article is titled "Precisely Controlled Vertical Alignment in Mesostructured Carbon Thin Films for Efficient Electrochemical Sensing" and published in the latest "ACS NANO"
    .
    Highlights of the article: 1.
    A simple preparation method can be used to synthesize a controllable, orderly and vertically arranged centimeter-level mesoporous carbon film, and the method is universal and applicable to a variety of substrates and materials
    .
    ? 2.
    The synthesized mesoporous carbon membrane can be precisely and highly regulated at the single-molecule micelle level, and the pore size of the mesopores can also be precisely regulated
    .
    ? 3.
    The synthesized mesoporous carbon film has a high specific surface area (472 m2g-1) and a very low detection limit (50 nmolL-1)
    .
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