Pressure-Induced Infiltration of Aqueous Solutions of Multiple Promoters in a Nanoporous Silica

摘要

Nanoporous technologies have received wide applications in a variety of areas,including catalysis,hydrogen storage,purification,selective absorption and adsorption,among others.For example,under high pressure,by forcing water into hydrophobic nanoporous particles,the system free energy can be largely increased.The excess solid-liquid interfacial energy can be regarded as being dissipated if the "outflow" is difficult,which has been observed in a few nanoporous silicas and silicalites.The "nonoutflow" may be caused by the change in contact angle,the formation of new liquid surfaces,or the energy barrier of gas-phase nucleation and growth.Due to the large specific surface area,the energy absorption efficiency of the nanoporous system can be higher than that of many conventional energy absorption materials by orders of magnitude.