الفهرس | Only 14 pages are availabe for public view |
Abstract Although the conventional sulfur oxide (SOx) removal technologies merit from their large-scale implementation, they are quite energy-intensive. Regarding this point of view, the development of low-cost, less energy-intensive strategies are highly demanded. Recently, the visible light photocatalytic approaches gained great attention from scientists due to the efficient catalytic performance under mild conditions. In this study, we aimed to develop an efficient method for removing flue gas contaminants by solving energy and cost problems. TiO2 nanoparticles (TiO2NPs) and TiO2 nanoclusters (TiO2NCs) were synthesized and tested for the transformation of SO2 gas to beneficial material. By adding thymol or naphthol to the reaction mixture, the results showed that TiO2 nanoclusters exhibited higher catalytic activity than TiO2 nanoparticlesand sulfonated compounds were obtained in quantitative yields. In addition, the SO2 gas concentration was reduced from 10 ppm to 60 ppb after 10 min under visible light irradiation. The photocatalytic removing rate of SO2 gas with TiO2 nanoclusters is higher than using TiO2 nanoparticles due to its high surface area. It was indicated that the newly developed protocol has several advantages regarding the formation of new sulfonated organic compounds and the mitigation effect of SO2 gas. |