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

The preparation of different carbon-shell morphology microspheres and controllable surface area via using thermoplastic polymers as carbon source was still a challenge. In addition, 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. 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. Metal salt assisted polymer carbonization will not only prepare graphitized carbon with different morphology on silica surface, but also facilitate the in-situ carbonization of thermoplastic polymer on the silica microspheres surface instead of internal pores; the more heat of metal salt released during carbonization, the larger the specific surface area of Sil@C.