The present invention provides for an ice-nucleating particle for cloud seeding and other applications, which can initiate ice nucleation at a temperature of -8 degrees C. Further, the ice nucleation particle number increase continuously and rapidly with the reducing of temperature. The ice nucleating particle in the present invention is nanostructure porous composite of 3-dimentional reduced graphene oxide and silica dioxide nanoparticles (PrGO-SN). The present invention also provides for a process synthesizing the PrGO-SN.