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Compared with commercial resins, [C3mim]+Cl-@SiO2 showed the strongest adsorption ability and highest selectivity. After desorption and crystallization, a purity of baicalin as high as 96.5% could be obtained. These results indicated that the ILs grafted silica materials were promising adsorbents for the adsorption and purification of baicalin and showed huge potential in the purification of other bioactive compounds from natural sources.The crystalline structure of silk fibroin Silk I is generally considered to be a metastable structure