Zn–Al LDH nanostructures pillared by Fe substituted Keggin type polyoxometalate: Synthesis, characterization and catalytic effect in green oxidation of alcohols

Zn–Al layered double hydroxides pillared by Fe(III) substituted Keggin type polyoxometalate, [Zn2Al(OH)6](NO3)0.6(PW11FeO39)0.1·mH2O (LDH-PWFe), was synthesized by anion exchange method. The synthesized compound was characterized using various techniques such as FTIR, XRF, XRD, TGA, and BET. The resulting LDH-PWFe was assessed as catalyst in the green oxidation of alcohols with aqueous H2O2 as the oxidant. Results showed that, LDH-PWFe is an efficient catalyst for the oxidation of alcohols into corresponding aldehydes with good to excellent conversions and excellent selectivity. Recovery and reusability experiments of the catalyst demonstrated that, it could be recycled and reused at least five times without manifest loss of activity and selectivity.

Graphical abstract[Zn2Al(OH)6](NO3)0.6(PW11FeO39)0.1·mH2O (LDH-PWFe) was synthesized and characterized using various techniques such as FTIR, XRF, XRD, TGA, and BET. Green oxidation of alcohols by H2O2 in the presence of LDH-PWFe as catalyst showed good to excellent yields. LDH-PWFe could be reused at least five times without manifest loss of activity.Figure optionsDownload full-size imageDownload as PowerPoint slide