Effects of Co-solvent on the Uniformity of Pore Size of ZnO Bulk Porous Nanosolids

Using sodium dodecylsulfate solution(SDS) as the pore-forming agent and ZnO nanoparticles as the starting material, ZnO porous bulk solid was successfully prepared by a novel solvothermal hot press method. Furthermore, the effects of the addition of polyethylene glycol 400(PEG-400) into the solvent were also investigated. It was found that, the pore diameter of the ZnO porous bulk solids largely decreased when PEG-400 was added into the solvent. Besides, the specific surface area and porosity also decrease correspondingly. On the other hand, the uniformity of the channel diameter of ZnO bulk porous nanosolids was greatly improved.