▎ 摘　　要

Graphene oxide (GO) was utilized as an amphiphilic support to immobilize functionalized ionic liquid containing phosphotungstatic imidazolium (lm-PW) by an anion-exchange method. The physicochemical properties of the synthesized Im-PW/GO material were characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, atomic force microscopy, scanning electron microscopy, transmission electron microscope, thermogravimetric analysis and contact angle measurements. In selective oxidation of benzyl alcohol to benzaldehyde, Im-PW/GO was determined to be an efficient triphase transfer catalyst, affording a high conversion (>90%) of benzyl alcohol and excellent selectivity (>99%) to benzaldehyde. Owing to the unique amphiphilic nature of GO support, the Im-PW/GO catalyst facilitated the contact between hydrophilic H2O2 and hydrophobic benzyl alcohol, therefore demonstrated superior catalytic activity to the similar catalyst supported on conventional SBA-15. Moreover, it was readily recovered and reused up to four times without any significant loss in terms of its activity. (C) 2017 Elsevier B.V. All rights reserved.