The surface of silica has strong chemisorption
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The surface of silica has strong chemisorption, which is related to the existence of surface hydroxyl groups. Its surface hydroxyl groups can combine with molecules in the form of hydrogen bonds to form a multi-molecular adsorption layer. Moreover, with the increase of hydroxyl density on the surface of silica, the amount of adsorbed water also increases, which can be reflected from the relationship between moisture absorption and surface area. The adsorption amount is proportional to the surface area of silica.
