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We report a simple low cost method at room temperature and normal pressure for the synthesis of mono-dispersed spherical rutile titania nanoparticles using the water in oil microemulsion process. The as-synthesized and calcined TiO 2  nanoparticles were characterized by means of X-ray diffractometry, Fourier transform infrared spectroscopy, thermogravimetric and differential thermal analysis, Brunauer–Emmett–Teller surface area analysis, scanning electron microscopy and transmission electron microscopy. The effect of calcination temperature on the crystalline phase, particle size, specific surface area and surfactant concentration was studied in detail. As-synthesized rutile TiO 2  nanoparticles showed remarkable photocatalytic activity for the degradation of methyl orange dye as a model pollutant. The reaction was found to follow first order kinetics. Chemical oxygen demand results show substantial degradation and mineralization of targeted dye.

Room temperature synthesis of microemulsion mediated rutile TiO 2 nanoparticles showing remarkable photocatalytic activity