Properties of Concentrated Aqueous Electrolyte Solution in a Vicinal Region of Coexisting Solid Surface

Abstract

Properties of concentrated ZnSO 4 aqueous solutions coexisting with metal oxide nanoparticles were observed. Raman spectroscopy indicated that ion pair forming tendencies was enhanced in the vicinity of silica nanoparticles which have hydrophilic groups. Zn 2+ is supposed not to make sufficient hydration sphere and tend to make contact ion pair due to sharing water molecules with hydrophilic solid surface. Alumina nanoparticles exhibited strong effect on 1 H relaxation than silica nanoparticles. The salt concentration dependences of 1 H relaxation time and pH of aqueous solution suggested that the effects from solid phase on coexisting liquid phase were affected by liquid property in itself.

Solvent molecule mobilities in propylene carbonate-based electrolyte solutions coexisting with fumed oxide nanoparticles

“…4. Here, in order to discuss dynamics of solvent molecules in restricted area between dispersed nano solid-particles, we proposed the hexagonal close packing model as shown in Scheme S2 which liquid layer is on solid surface and the solid particles are monodispersed [42]. In this model, it is assumed that the interaction between the solid particles which has the liquid layer can be ignored and they are closely packed.…”