Metal salts assisted thermoplastic polymer NIPAM in-situ carbonization on porous silica microspheres surface

The unique structure of porous Silica@Carbon (Sil@C) microspheres not only can provide larger surface area and active site, but also have the characteristics of high mechanical strength and easy modification. However, the preparation of different carbon-shell morphology microspheres and controllable operation of surface area via using polymers as carbon source was still a challenge. Herein, we report a simple method to in-situ fixation a series of different morphology graphitized carbon shell (rosa roxburghii, bulk, and carbon sphere shapes) on porous silica microspheres surface. The heat released by metal salts at high temperature will not only prepare graphitized carbon with different morphology on silica surface, but also facilitate the in-situ carbonization of thermoplastic polymer on the surface of cabinet without entering silica internal pores. This experimental method provided an experimental theoretical basis to prepared Sil@C microspheres with controllability of carbon-shell morphology and surface area.