Abstarct: In this research, it was enabled to synthesize a new heterogenous catalyst, which possesses a high efficiency, due to its large specific surface area, by the use of aniline-functionalized graphene oxide as a support for immobilization of a molybdenum complex. Its catalizing capability in epoxidation of alkenes was investigated by the use of gas chromatography technique. Results have proved the high capability of this compound in catalyzing the epoxidation reaction of alkenes. As another research, a composite of deposited silver-nanoparticles on aniline-functionalized graphene oxide was synthesized and its antimicrobial characteristic, against Bacillus subtilis and Pseudomonas syringae bacteria, and Alternaria solani and Fusarium oxysporum funguses, was investigated; considering the results, the synthesized composite has shown a good ability in inhibiting the growth of these microorganisms. FT-IR, TG/DTA, SEM, XRD, CHN and ICP techniques was utilized, in order to confirm each synthesis step having been successfully done, and also to study the characteristics of these two compounds.