How to prepare high density three-dimensional graphene

A new method of high-density three-dimensional graphene preparation proposed by the Suzhou Nano Institute of the Chinese Academy of Sciences and the Institute of Physics of the Chinese Academy of Sciences

Recently, the team of Liuliwei of the Suzhou Nano Institute of Chinese Academy of Sciences collaborated with the Institute of Physics of the Chinese Academy of Sciences to propose a novel high-density three-dimensional graphene preparation method. The relevant results were published in the "Science Report."

Three-dimensional graphene is a porous net-like structure formed by the cross-linking of two-dimensional graphene. The three-dimensional graphene prepared by chemical vapor deposition(CVD) has the potential for application in energy storage, sensing, and water purification due to its high specific surface area and excellent conductivity, and has become the most concerned graphene related material at present. one. Previously, it was reported that the three-dimensional graphene prepared by CVD was based on nickel foam as a catalyst carrier. However, its practical application will also face low growth density, large structural porosity, and low mechanical strength.

The researchers used NiCl2 · 6H2O as a new catalyst precursor to construct a high-density porous cross-linked three-dimensional catalyst template, and realized the simple and rapid preparation of high-density three-dimensional graphene macrobodies using atmospheric pressure CVD. The problems of high porosity, low density and weak mechanical properties are solved.

The researchers used the high-density three-dimensional graphene macrobody as an electrodeposition electrode to achieve the rapid removal of heavy metal ions in aqueous solution. The discovery is expected to obtain important applications in removing heavy metal ions in water bodies.

In addition, the three-dimensional macro body also has a wide range of applications in energy storage, heat transfer, electromagnetic shielding and preparation of some composite systems.

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