| 摘要 |
Abstract A method of preparing silica nanoparticles having a diameter of about 50 nm to about 1000 nm and a particle density of about 1.96 g/cm 3 or less, said method comprising (a) reacting an orthosilicate and an alcohol or a mixture of alcohols in an aqueous medium in the presence of a salt of a metal of Group la or Group Ila or in the presence of a metalloid compound, optionally in combination with ammonium hydroxide, (b) isolating the resulting nanoparticles, and (c) treating the nanoparticles from (b) with an acid. Leydig 715961 Silica Dissolves in Seconds Dissolves in Hours (Days) Prio,- Art Doped Silica Mineral Acid Alkaline oom d momm-mnp 00 Increased Incrase Dissolves in mutes Surface IOK Area |
