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

作者：Zheng Jiamin^*; Huang Jie; Li Xian; Dai Wei Lin; Fan Kangnian

来源：RSC Advances, 2012, 2(9): 3801-3809.

DOI：10.1039/c2ra20196h

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 (gamma-Fe2O3/gamma-Al2O3 and Al2O3/alpha-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 gamma-butyrolactone. They could also be easily recovered due to their super-paramagnetic property. XRD, TEM, XPS and H-2-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.

• 出版日期2012
• 单位复旦大学