Zeolites are generally synthesized from solutions of sodium
aluminate and a suitable silica source such as TEOS (tetraethyl
orthosilicate) or sodium silicate.11 The type of zeolite formed
depends on (i) the reactants used, (ii) the synthesis conditions
applied (such as temperature, time, and pH), and (iii) the templating
ion. The templating ion is usually a cation