Titanium nitride/silicon nitride/carbon nitride/graphene composite nanomaterial and preparation method thereof

Abstract

The invention provides a preparation method of a titanium nitride / silicon nitride / carbon nitride / graphene composite nanomaterial. The method comprises the steps of firstly obtaining a titanium nitride / silicon nitride composite nanomaterial and then obtaining the composite material through a hydrothermal method under the action of a template agent lysine. The obtained material is in a uniform fiber form, the diameter of the fiber is dozens of nanometers, the pore volume is 0.36-0.47cm<3> / g and the specific surface area is 220-280m<2> / g; the prepared nanomaterial has excellent properties of extremely high specific surface area, ultrahigh mechanical property, high conductivity and thermal conductivity and the like, is beneficial to electron transfer in an electrode reaction process when used as a lithium-ion electrode material, is small in absolute volume change in charging and discharging processes, and has high electrochemical lithium storage capacity, good stable cycle performance and a relatively small energy loss; the electrochemical properties of a composite nanomaterial electrode are strengthened; and the application prospect is very wide.

Description

technical field

[0001] The invention belongs to the technical field of nanomaterial application, and in particular relates to a titanium nitride / silicon nitride / carbon nitride / graphene composite nanomaterial and a preparation method and application thereof. Background technique

[0002] The study of nanomaterials is a frontier field in today's scientific research, and it is also a hot spot studied by many scientists all over the world. The magic and unknown aspects of nanomaterials have aroused people's widespread attention; the research and application of nanomaterials are currently hot spots and difficulties, and are also the focus of high-tech development.

[0003] Carbon nitride is a class of organic semiconductor photocatalytic materials widely used in photolysis of water and photodegradation of organic pollutants. Carbon nitride is generally prepared by polymerization of nitrogen-containing precursors at high temperature. However, the bulk carbon nitride prepared by ...

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