▎ 摘　　要

NOVELTY - Preparation method of nanocomposites with elemental silicon particles anchored inside the axial plane of nitrogen-doped graphene involves using 1-imidazole-4-carboxylic acid as a complexing agent to react with a silicon source compound, and a silicon-coordinated framework compound is prepared by a hydrothermal method, then fully mixing with a nitrogen source and a carbon source, and then calcining and carbonizing at high temperature includes the following steps, which involves: i. dissolving 1-imidazole-4-carboxylic acid in the acetonitrile solution to form a homogeneous ligand solution, adding the silicon source slowly into the ligand solution system, and silicon source addition amount accounts for 1-10 wt.% of the ligand solution mass ratio; ii. mixing obtained silicon-containing coordination compound powder with a nitrogen source and a carbon source in a mass ratio of 5:1-10:10, and then calcining for 4 hours under the protection of nitrogen, and then naturally cooling. USE - Preparation method of nanocomposites with elemental silicon particles anchored inside the axial plane of nitrogen-doped graphene used for catalysis, energy storage, photoelectric devices and sensors. ADVANTAGE - Composite material prepared by the method is in a three-dimensional structure, silicon nanoparticles are dispersed and embedded in the graphene material, and the co-doping of silicon and nitrogen enables the band gap structure of the graphene material to be effectively opened, so that the obtained material has the property of a semiconductor. DETAILED DESCRIPTION - Preparation method of nanocomposites with elemental silicon particles anchored inside the axial plane of nitrogen-doped graphene involves using 1-imidazole-4-carboxylic acid as a complexing agent to react with a silicon source compound, and a silicon-coordinated framework compound is prepared by a hydrothermal method, then fully mixing with a nitrogen source and a carbon source, and then calcining and carbonizing at high temperature includes the following steps, which involves: i. dissolving 1-imidazole-4-carboxylic acid in the acetonitrile solution to form a homogeneous ligand solution, adding the silicon source slowly into the ligand solution system, and the silicon source addition amount accounts for 1-10 wt.% of the ligand solution mass ratio, and passing through stirring to fully disperse the silicon source in the ligand solution, sealing the ligand solution in a polytetrafluoroethylene reactor, hydrothermally reacting at 170-200 °C for 24-48 hours, washing and drying to obtain a silicon-containing compound framework solid powder of the compound powder; ii. mixing obtained silicon-containing coordination compound powder with a nitrogen source and a carbon source in a mass ratio of 5:1-10:10, and then calcining for 4 hours under the protection of nitrogen, and then naturally cooling. An INDEPENDENT CLAIM is included for nanocomposite in which elemental silicon particles are anchored in the axial plane of nitrogen-doped graphene, composite material exhibits a three-dimensional structure, dispersing silicon nanoparticles and embedding inside the graphene-like material, co-doping of silicon and nitrogen results in the effective opening of the band gap structure of the graphene material and reaction charge density increases, showing high catalytic activity. DESCRIPTION OF DRAWING(S) - The drawing shows a scanning electron microscopy image of the nanocomposite in which the elemental silicon particles synthesized are anchored in the axial plane of nitrogen-doped graphene.