Center of Excellence on Environmental Health and Toxicology (EHT)
| This research focuses on the development of photocatalytic efficiency of nanotitanium dioxide for degradation of benzene contaminant in water. Titanium dioxide nanoparticles with different sizes were prepared by chemical precipitation method and sol-gel process. Silver-modified titanium dioxide nanoparticles (silver/titaniumdioxide nanoparticle) were prepared by chemical reduction method with various mole percent of silver. The synthesized samples were characterized by electron microscopy techniques combined with energy dispersive X-ray analysis. The optical properties were also studied by fluorescence spectroscopy and UV-diffuse reflectance spectroscopy. The amount of benzene contaminant in water was analyzed by UV-visible spectroscopy. The catalytic efficiency of nanotitanium dioxide to photocatalytic degradation of benzene was found related to their particle size and surface compositions. The factors influence to the photocatalytic degradation of benzene such as amount of catalyst and initial concentration of benzene were studied. The developed nanosilver/titanium dioxide showed high photocatalytic efficiency with more than 80% of benzene contaminant in water was degraded.
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