Sol-Gel Method: The sol-gel method is one of the most widely used techniques for the synthesis of nanosilica. It involves the hydrolysis and condensation of silicon alkoxides or silicic acid precursors in a solution to form a gel. The gel is then calcined to obtain nanosilica particles. The sol-gel method offers control over the particle size and morphology of nanosilica and allows the incorporation of various dopants.
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