Three-dimensional carbon nanocomposites have excellent physical and chemical properties, and have the advantages of easy synthesis, low cost, and controllable morphology. They have been widely used in enzyme immobilized carrier electrodes in recent years. They have been used in biofuel cells, electrochemical analysis, Photocatalysis and other fields.
At present, three-dimensional carbon nanocomposites are mainly composed of a mixture of a large number of one-dimensional and two-dimensional carbon nanomaterials. The overall structure has a high proportion of interface atoms, resulting in a large interface contact resistance and low conductivity, which affects electrode performance. Recently, a team led by Zhu Zhiguang, a researcher at the Center for In vitro Synthetic Biology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, has developed a continuous three-dimensional carbon nanocomposite material for the preparation of bioelectrodes and the application of biofuel cells. In this study, a square tube-shaped conductive polymer (polypyrrole) was carbonized at a high temperature to form a continuous three-dimensional carbon nanomaterial with excellent conductivity. At the same time, the four walls of the square tube material are collapsed by high temperature, which provides a good attachment point for the enzyme and improves the surface area and biocompatibility of the material. After immobilizing glucose oxidase and laccase, the constructed glucose / oxygen biofuel cell has a voltage of 1.16V and an output power of 0.35mW / cm2, and can be continuously discharged for more than 50 hours under the condition of 2mA, and the LED lamp is lit. This research provides new ideas and methods for the construction of new three-dimensional carbon nanomaterials and their application in bioelectrochemical systems.
The research was supported by the key deployment project of the Chinese Academy of Sciences (ZDRW-ZS-2016-3S) and the National Natural Science Foundation of China (21706273 and 21878324). The relevant results were published in Biosensors & Bioelectronics. Author, Zhu Zhiguang is the corresponding author of the thesis.
And application diagram of continuous three-dimensional carbon nanocomposite bioelectrode
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