Microwave assisted green synthesis and characterization of new phase inorganic ion-exchange materials: bismuth tungstate and stannic arsenate

Abstract

Inorganic ion-exchangers are of great interest because of their applications as versatile ion-exchange materials, molecular sieves and promising separation potentialities etc. Synthetic inorganic ion-exchange materials are advanced materials that are superior to their organic counterparts because these are stable in ionizing radiation, elevated temperatures and have high chemical resistivity. Instead of synthesizing these materials by conventional methods, new phases of bismuth tungstate and stannic arsenate inorganic ion-exchangers were obtained by microwaveassisted method, which takes only 5-10 minutes to obtain the crystalline product. Both the materials were characterized by observing their chemical stability, cationexchange capacities (CEC) for various metal ions, effect of heat on CEC, pH titration and FTIR studies.