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Abstract: In this paper, layered titanic acid H1.07Ti1.73O4•H2O (HTO) was treated with hydrogen peroxide solution to achieve the hydrogen peroxide intercalation and modification of HTO. The hydrogen peroxide molecules entered into the interlayer of TiO6 octahedral layer, forming a peroxytitanium coordination bond with Ti4+ in the layer, which increased the negative charge density of the TiO6 layers. XRD, SEM, TEM, XRF, FT⁃IR and other methods were used to characterize the samples before and after ion exchange. The ion exchange experiments show that compared with HTO, the ion exchange efficiency and ion exchange capacity of H2O2⁃modified HTO are greatly enhanced. And the main reason is that the introduction of H2O2 leads to the increase of negative charge of TiO6 octahedral layers.

Key words: Layered titanate, H2O2, Intercalation, Ion exchange