Respective water-soluble graphene oxide (GO) and Fe-aminoclay were investigated for decoloration of recalcitrant organic dyes with different charges in the presence of hydrogen peroxide (H2O2). This oxidation process was updated in order to enable development of heterogeneous catalysts by self-assembled (precipitated) GO with organo-building blocks of Fe-aminoclay in aqueous solution. Due to electrostatic attraction between the negatively charged GO and the positively charged Fe-aminoclay, the obtained catalysts decomposed H2O2 at pH 6.0 to generate (OH)-O-center dot radicals capable of breaking aromatic carbon structures. These novel catalysts were tested for cationic methylene blue (MB) and anionic orange II (OII) as model pollutants. At 1.0 wt% of H2O2 treatment, the apparent rate constants of MB and 011 by the optimal loading of catalyst (0.61 mg/mL) were 0.35288 h(-1) (r(2) = 0.9721) and 0.57930 (r(2) = 0.9581), respectively. Furthermore, in the two-dye mixture system, simultaneous decoloration of both dyes, to near-complete similar to 100% removal, was achieved after 5 h. Thus, it can be concluded that our developed catalysts for heterogeneous Fenton-like reaction at neutral pH are suitable for practical application. (c) 2013 Elsevier B.V. All rights reserved.