Microwave Synthesis of Ag-PbWO4/Zeolite Composites Assisted by A Solid-State Metathetic Approach

Abstract

Ag-PbWO₄/zeolite composites were synthesized using a solid-state metathetic method with microwave irradiation. The characteristics of the solid-state metathetic reaction and the formation of the high lattice energy by-product of NaCl were found to drive the reaction for Wolframite-type PbWO₄ toward completion. The Ag-PbWO₄/zeolite composites were formed completely at 600 ºC. Monoclinic-like crystals of PbWO₄ were primarily co-mixed with porous zeolite-A. Small spherical silver particles were immobilized in the porous PbWO₄/zeolite-A matrix.