▎ 摘　　要

Polyaniline (PANI) chains were grafted at the edge of graphene oxide (GO) sheets by in situ chemical oxidation polymerization with the p-phenylenediamine attached to GO sheets as anchor sites. The structure and morphology of the GO-PANI composite were characterized by Fourier-transform infrared spectroscopy (FTIR) and Raman spectroscopy, thermogravimetric analysis, X-ray diffraction, elemental analysis, and transmission electron microscopy. The GO-PANI were used to adsorb Pb(II) and methylene blue (MB) from aqueous solution. The results showed that the adsorption kinetics and isotherms followed pseudo-second-order and Langmuir isotherm model, respectively. GO-PANI exhibited the maximum adsorption capacity for Pb(II) (1416 mg/g) compared with other absorbents. The process of adsorption for Pb(II) onto GO-PANI is spontaneous and endothermic at 288, 298, and 308 K. In mixed system, the adsorption capacity for MB and Pb(II) onto PANI-GO achieved 544 and 1004 mg/g, respectively. This study provides a promising PANI-GO composites with an efficient adsorption property for MB and Pb(II). (C) 2016 Society of Plastics Engineers