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Drimarene Blue K2RL, azo dye, is found in the waste streams of textile industry by dint of its poor absorbability to fiber. Its degradation and discoloration is necessary because it is toxic, carcinogenic, mutagenesis and resistant to degradation. Microemulsified TiO₂ nanoparticles catalyst (MTNC) has been applied to reactive azo dye (Drimarene Blue K₂RL) solution under solar irradiation. MTNC was prepared by reverse microemulsion method, which is simple and cost effective in controlling the size and yields of catalyst. MTNC was characterized using techniques such as Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Scanning electron microscopy (SEM) and BET.  In addition, maximum decoloration of 50 ppm of K₂RL was observed for 90 min at room temperature. Initially degradation rate was high but after an hour the rate decreased. The maximum degradation was observed after 1.5 hours.