Clean water source is contaminated by industrial wastewater effluent which directly discharge into water stream. Combination of adsorption-photocatalytic is one of the preferable techniques for treating methylene blue (MB) dye wastewater. In this study, hydrothermal method was utilised in order to synthesis titanium oxide (TiO 2 ) nanoparticles. The synthesis of rGO was conducted by Hummer’s method by using lemon extract. Both...