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In this study, sustainable graphene oxide-TiO₂/sodium alginate and reduced graphene oxide-TiO₂/sodium alginate aerogels were synthesized and the potential of these aerogels was investigated for microcystin-LR degradation in aqueous solution. Along with the role of alginate in the synthesis of aerogels, effects of different concentrations of photocatalyst, photolysis, pH, and combination of TiO₂ (anatase)/Degussa P25 with graphene were investigated in lieu of microcystin-LR photodegradation.The complete degradation of microcystin-LR was attained in case of reduced graphene oxide-TiO₂/sodium alginate aerogel—not in graphene oxide-TiO₂/sodium alginate aerogel case—by the synergistic effect of adsorption and photodegradation. The recyclability study of reduced graphene oxide-TiO₂/sodium alginate aerogel demonstrated high stability and photoactivity and the degradation efficiency was not much …