Utilization of Ag₂O–Al₂O₃–ZrO₂ decorated onto rGO as adsorbent for the removal of Congo red from aqueous solution

The water resources contamination in an alarming concern for sustainable environment. This has led to development of new technologies and materials for waste water detoxification. In the present study, we have fabricated novel trimetallic based mixed oxides decorated reduced graphene oxide (rGO) composite using facile microwave method and utilized it as an adsorbent for the removal of congo red dye from aqueous solution. The final composite showed highly agglomerated metal oxides present on the rGO surface. The high surface area and activity of the synthesized adsorbent resulted in its high adsorption capacity of 333.32 mg/g for congo red. The Langmuir model better explained the isotherm data indicating the monolayer adsorption of congo red molecules onto Ag₂O–Al₂O₃–ZrO₂/rGO surface. The grander adsorption ability of Ag₂O–Al₂O₃–ZrO₂/rGO towards organic dye indicate its probable utilization in the removal of other dyes also from wastewater.