| 초록 |
A facile synthetic method of porous silica and titania nanoparticles was developed using inorganic (alkali metal) salts instead of ionic and nonionic organic surfactants, starting from the neutralization of sodium silicate (Na2SiO3) and titanium oxychloride (TiOCl2) in an economic point of view. These micro and mesoporous silica and titania nanoparticles are useful in various applications. A series of inorganic salts such as alkali metal chloride (LiCl, NaCl, KCl, RbCl and CsCl) and alkali metal halide (NaF, NaCl, NaBr and NaI) were tested at various reaction conditions (temperature, neutralization time, concentration effect). The porous silica and titania nanoparticles prepared were analyzed by a scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and Barrett-Joyner-Halenda (BJH) measurement (specific pore volume, diameter, specific surface areas (SBET). |
