| abstract |
The invention discloses a ternary composite material. The ternary composite material is based on three-dimensional graphene foam, and titanium dioxide nanospheres are supported on its surface; wherein, graphene quantum dots are embedded in the titanium dioxide nanospheres. The GQD-TiO 2 -GM composite material prepared by the invention has a three-dimensional pore structure, which has a large specific surface area, which is helpful for improving the response strength and sensitivity to formaldehyde gas. In addition, TiO 2 nanograins form GQD‑TiO 2 ‑GM hetero(p‑n‑p) junctions with graphene quantum dots and graphene foams, which can play a role in reducing the operating temperature of the sensor and improving the gas sensing performance. huge effect. |