▎ 摘　　要

A new approach to prepare reduced graphene oxide was developed by using sodium diphenylamine sulphonic acid salt as both a reducing and stabilizing agent. Graphene oxide was transformed to reduced graphene oxide with the appropriate pH, temperature and reducing agent/graphene oxide ratio. The reduced graphene oxide was characterized by ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, thermo-gravimetric analysis, X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy. The reduced graphene oxide aqueous suspension showed extraordinary stability in the absence of any external stabilizing reagents. The X-ray photoelectron spectroscopy analysis showed that this excellent stability is due to modifications of the reduced graphene oxide nanosheets by the sodium diphenylamine sulphonic acid salt molecules. The modified reduced graphene oxide aqueous suspension shows good catalytic performance for the synthesis of isoamyl benzoate.