Mesoporous Structure Control of Silica in Room-Temperature Synthesis under Basic Conditions

Figure 4

Change in XRD patterns with amount of water in the reactant mixture solution; compositions (TEOS : NH₃ : EtOH : CTABr : H₂O = 1 : 20 : 40 : 0.2 : ) are (a) , (b) , and (c) .