Abstract In this work, tin oxysulfide coated TiO2 nanoparticles for photocatalytic pollutant degradation were fabricated via a two-step vacuum process which involves powder atomic layer deposition (PALD) of SnO on… Click to show full abstract
Abstract In this work, tin oxysulfide coated TiO2 nanoparticles for photocatalytic pollutant degradation were fabricated via a two-step vacuum process which involves powder atomic layer deposition (PALD) of SnO on TiO2 nanoparticles followed by sulfurization annealing. The physical and chemical properties of the Sn(O,S)/TiO2 nanoparticles were characterized and compared with TiO2 and SnO/TiO2. From the methylene blue (MB) degradation test, the photocatalytic activities of Sn(O,S)/TiO2 were examined. The Sn(O,S)/TiO2 showed ~ 6.7 and 16-fold improved MB degradation rate constants of 0.002 and 0.114 min−1 compared to the pristine TiO2 under visible light and Xe lamp irradiations, respectively. This may be attributed to the synergetic effects of enhancing the electron-hole charge separation and light absorption characteristics.
               
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