High Selectivity of Visible-Light-Driven La-doped TiO2 Photocatalysts for NO Removal

• DOI: 10.4209/aaqr.2017.08.0282
• Publication Date: 2017-09-18T08:03:42Z
• Authors: Yu Huang; Jun-Ji Cao; Fei Kang; Sheng-Jie You; Chia-Wei Chang; Ya-Fen Wang
• Keywords: Visible spectrum; Charge carrier; Degradation

Semiconductors mediated by rare earth metals (REMs) have attracted attention with regard to the degradation of pollutants. In order enhance visible response TiO2, La-doped TiO2 (La-TO) photocatalysts visible-light-driven capacity for NO removal were successfully synthesized in this study via a facile sol-gel method followed calcination. A series La-TiO2 samples differing weight ratios evaluated their photocatalytic performances. It was found that 3% La integrated (in mass ratio) could efficiency (up 32%) under solar light, which is more than twice seen pure TiO2. The resulting products characterized techniques, such as XRD, FTIR, UV-vis DRS, BET and (photo)electrochemical analysis. results indicated can harvest light due relatively narrow band gap (from 2.98 2.75 eV). More importantly, dopant improved electron-hole separation suppressed charge carrier recombination, synergistic effect. Furthermore, increased photo-oxidation transformation from NO3–, owing inhibition production intermediate NO2 (0.02%). To best our knowledge, first time has been used eliminate (at ppb level) atmosphere. This provides controllable route fabricate La-TO photocatalyst abatement high selectivity light.