Chemical Modification of AlPO₄-Based Mesoporous Solids Prepared from Phase-Separated AlPO₄-B₂O₃-Na₂O Glass

Abstract

The ternary oxide system AlPO4-B2O3-Na2O resembles a well known ternary system SiO2-B2O3-Na2O, and forms a phase-separated glass. The as-prepared glass AlPO4-B2O3-Na2O was already phase-separated from the beginning, and the B2O3-Na2O rich phase was easily removed by washing with water. The remaining AlPO4-based glass has a mesoporous structure with exchangeable Na ions. The porous structures can be chemically modified through the ion-exchange of the Na ions with various kinds of inorganic and organic cations. The pore size distributions and thermal stability of the resulting solids will be discussed.