Issue 9, 2012

Novel magnetic-separable and efficient Au/Fe–Al–O composite for the lactonization of 1,4-butanediol to γ-butyrolactone

Abstract

Nano-sized gold catalysts have attracted much interest during recent years. Here, we report a new material to improve the catalytic activity and recyclability of gold catalysts. Multi-component Fe–Al–O oxides prepared by impregnation (γ-Fe2O3/γ-Al2O3 and Al2O3/α-Fe2O3) and encapsulation (Fe2O3@Al2O3) methods were employed as carriers for gold catalysts. The Au/Fe–Al–O composites exhibited efficient catalytic activity and selectivity for the lactonization of 1,4-butanediol to γ-butyrolactone. They could also be easily recovered due to their super-paramagnetic property. XRD, TEM, XPS and H2-TPR were used to characterize the composites. The influence of surface Fe/Al ratio on Au/(Fe2O3@Al2O3) composites was also studied by adjusting the Fe/Al molar ratio for comparison and the optimal Fe/Al ratio was found to be 1 : 4. The results confirmed that higher conversion and selectivity were obtained due to the bifunctional effect of Fe2O3 and Al2O3.

Graphical abstract: Novel magnetic-separable and efficient Au/Fe–Al–O composite for the lactonization of 1,4-butanediol to γ-butyrolactone

Article information

Article type
Paper
Submitted
02 Feb 2012
Accepted
03 Feb 2012
First published
06 Feb 2012

RSC Adv., 2012,2, 3801-3809

Novel magnetic-separable and efficient Au/Fe–Al–O composite for the lactonization of 1,4-butanediol to γ-butyrolactone

J. Zheng, J. Huang, X. Li, W. Dai and K. Fan, RSC Adv., 2012, 2, 3801 DOI: 10.1039/C2RA20196H

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