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

摘要： 采用H₂O₂溶液处理层状钛酸H_1.07Ti_1.73O₄·H₂O（HTO），对其实现H₂O₂插层改性。H₂O₂分子进入到层状钛酸的TiO₆八面体层间，并与层中Ti⁴⁺形成过氧钛配位键，提高了TiO₆层负电荷密度。利用XRD、SEM、TEM、XRF、FT⁃IR等测试手段对离子交换前后的样品进行表征。结果表明，H₂O₂修饰后的HTO相对于HTO，其离子交换效率和离子交换容量都得到大幅度提升，其主要原因是H₂O₂的引入使TiO₆八面体层的负电荷增多。

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