Microwave degradation of methyl orange dye in aqueous solution in the presence of nano-TiO2-supported activated carbon (supported-TiO2/AC/MW)

► Nano-TiO2-supported activated carbon (TiO2/AC) was developed and applied to enhance microwave (MW) degradation of azo dye in aqueous solution. ► The supported-TiO2/AC displayed higher catalytic activity than AC alone under MW irradiation. ► The effects of supported-TiO2 content, MW irradiation time, C0, catalyst dose and pH on the degradation extent were assessed. ► The supported TiO2 on AC can be excited to help generate hydroxyl radical in aqueous solution under MW irradiation.