| Degradation of Polycyclic Aromatic Hydrocarbons in Water/methanol Solutions with Nanoparticle Photocatalysts Based on Silver Doped TiO2 | ||
| Junfeng Niu1, Songzhe Chen2, Lili Wang1, Ya He1 and Jingyi Wang1, (1)State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China, (2)Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China Photodegradation of polycyclic aromatic hydrocarbons (PAHs) in water/methanol solutions was investigated in this study. Both direct photodegradation and photocatalytic degradation of phenanthrene, fluorene, and benzo[a]pyrene dissolved in aqueous/methanol solutions (20% methanol in water) were performed in a thin film photoreactor. PAHs were irradiated with a 5W low-pressure mercury lamp that was placed in a quartz immersion well to filter out high-energy UV bands (γ<290nm). The silver loaded on titanium dioxide (Ag/TiO2) 1.0% (wt.%) silver was loaded on surface of the commercial anatase TiO2 powder from aqueous AgNO3 solution. The photocatalysts were characterized by FTIR, TEM, XRD and XPS measurements. Ag-TiO2 was found to be nanometer particles mainly existing with anatase crystals and Ag was mostly in zero valence state. The results indicated that silver loaded on titanium dioxide (Ag/TiO2) can improve rapidly the photodegradation rates of these PAHs in aqueous/methanol solutions, compared to direct photodegradation. Degradation of PAHs with nanoparticle photocatalyst Ag-TiO2 may be one of the promising technologies in the field of water treatment. Extended Abstract Status: File Uploaded | ||