Remarkably enhanced ion-exchange capacity of H2O2-intercalated layered titanate.

H2O2-intercalated layered titanate H1.07Ti1.73O4 (H2O2-HTO) exhibits a dramatically enhanced ion-exchange capacity and remarkably improved reaction rate with various divalent cations. The intercalation can increase the negative charge density of the TiO6 octahedral layer and the number of ion-exchangeable H+ by forming a Ti(IV)–O–O–H bond that is the driving force to change the ion exchange performance.