Synthesis of Three-Dimensionally Ordered Macroporous (3D0M) TiO_2: Photodegradation Catalyst

摘要

Three-dimensionally ordered macroporous (3DOM) TiO_2 were successfully synthesized by incorporating colloidal crystal template and sol-gel method using titanium isopropoxide and ethanol as precursors. After calcination at 450°C, the synthesized photocatalyst was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and diffuse reflectance UV-VIS spectroscopy (DR/UV-VIS). XRD results indicated that only anatase was presented. SEM images illustrated highly ordered macroporous structure which was a characteristic for 3DOM materials. The band gap energy of 3DOM TiO_2 and nanoparticles TiO_2(NP TiO_2) were 3.26 eV and 3.23 eV, respectively. Although the band gap value of 3DOM TiO_2 similar to NPs TiO_2 but the photocatalytic performance of the 3DOM TiO_2 were higher than that of commercial nanoparticle TiO_2. The result suggested that its ordered porous structure is great advantage for photocatalysis.