On the nature of Ti(IV)‐pillared layered metal hydroxides prepared from green, water‐soluble Ti‐peroxide

Abstract

Ti-peroxide pillared layered double hydroxides (LDHs) have been prepared for the first time using water-soluble Ti-peroxide as an intercalating precursor. It is novel and alluring that the whole preparation procedure does not involve any usage of organic or chlorine-containing hazards. Intercalated into the LDH interlayer region, Ti-peroxide is prevented partially from condensation in the solvent evaporation. The interlayer TiAO 2 unit exists in triangular (g 2 ) structure with C 2m symmetry in most cases, giving an interlayer gallery of 0.50-0.60 nm. But in the case of pH 4.0, monodentate (g 1 ) structure is also observed, giving an interlayer gallery of 0.70 nm. All the Ti-peroxide pillared LDHs prepared in this work show catalytic activity in the selective oxidation of thioether. The Ti-peroxide introduced into the interlayer regions of Mg/Al LDH with a particle size of around 50-120 nm exhibits better recyclability than Ti-peroxide gel, either in bulk or adsorbed on the exterior surface of LDH particles. V

Efficient Recycling Blast Furnace Slag by Constructing Ti-Embedded Layered Double Hydroxide as Visible-Light-Driven Photocatalyst

“…In addition, the peaks at 798 cm −1 and 670 cm −1 are ascribed to the typical vibrations of Al-OH and Mg-OH bonds in MgAl LDH, respectively [27]. The bonding structure of Ti was recognized as an O-Ti-O bond with the vibration peak at 483 cm −1 [28]. Furthermore, a fresh generated peak at 580 cm −1 was recognized and attributed to the Fe-O vibration [29], and this result illustrates the existence of Fe in as-obtained product, which is possibly originated from the residual Fe in pristine Ti-BFS.…”

Influence of temperature on the characteristics of Ni(II), Ti(IV) layered double hydroxides synthesised by different methods

“…For instance, introduction of molybdate [24] or peroxotitanate anion [25] allows to obtain effective oxidation catalysts. Introduction of polyoxotungstate anion into the interlayer space allows to obtain a propene epoxidation catalyst [26] or photooxidation catalyst [27].…”