Influence of Gamma Radiation on the Improvement of Stability, Conductivity and Photoactivity of Titania Nanofluid

The aim of this research is to investigate the stability of titania nanofluid by utilizing the effect of gamma irradiation on the preparation of nano titania. Nanofluids with 0.0075–0.25 wt% TiO₂ loadings nanoparticles were prepared using a two-step method. Ultrasonic processing was applied to allow the homogeneity and Sodium Dodecyl Sulfate (SDS) as anionic surfactant which added to increase the stability of the prepared samples under this investigation. Several characterization techniques were adopted to visualize the stability and sedimentation rate of the prepared nanofluids viz., UV–vis spectrometry, particle size distribution, zeta potential, transmission electron microscopy (TEM) and sedimentation photo capturing. The results revealed that nanofluid prepared using TiO₂ irradiated with gamma radiation during preparation are the most stable suspension within 37 days. In addition, photocatalytic activity of nanofluids was examined using Methylene Blue dye (MB) as hazardous compound. It was found that using the same amount of TiO₂ sample, the TiO₂ nanofluid exhibited higher catalytic efficiency for this reaction.