Hydrothermal, microwave and mechanochemical modification of amorphous zirconium phosphate structure

Abstract

The influence of hydrothermal HTT, microwave MWT and mechanochemical MChT treatments on structure of precipitated amorphous zirconium phosphate has been studied. Using XRF, XRD and DTA-TG techniques, the formation of the low-crystalline zirconium hydrophosphate Zr(HPO4)2·H2O after HTT and MWT has been established. All types of modification promote increase in specific surface area, pore volume and pore size as well as extend the limits of the porous structure parameters variation. MChT of wet gel allow to prepare the samples possessing simultaneously high values of specific surface area, volume and pore size. Total surface acidity significant increases as a result of modification. HTT and MWT as well as MChT of wet gel lead to increasing surface homogeneity as the decrease in fractal dimension for modified samples indicates.