Mesoporous Pb3Nb2O8 photocatalysts were synthesized by the evaporation‐induced self‐assembly (EISA) method. Ag was deposited on the surface of mesoporous Pb3Nb2O8 by a facile photoreduction process. The as‐prepared...Mesoporous Pb3Nb2O8 photocatalysts were synthesized by the evaporation‐induced self‐assembly (EISA) method. Ag was deposited on the surface of mesoporous Pb3Nb2O8 by a facile photoreduction process. The as‐prepared samples were characterized by TG‐DSC, XRD, N2 adsorption, HR‐TEM andUV‐Vis spectroscopy. The results revealed that mesoporous Pb3Nb2O8 has a large specific surfacearea and uniform pore size distribution both before and after Ag deposition. The photodegradationof 2‐propanol and acetaldehyde gas under visible‐light (λ > 420 nm) irradiation was employed toevaluate the photocatalytic activities of the samples. The results showed that the photocatalyticactivity of mesoporous Pb3Nb2O8 is greatly improved by the Ag co‐catalyst. These mesoporousPb3Nb2O8 exhibit photocatalytic activities as much as 41 times higher when compared with thePb3Nb2O8 prepared by the solid state reaction method. The content of loaded Ag ranged from 0.5%to 5% (Ag2SO4). The optimal loading was determined to be 1% corresponding the highest photocatalyti cactivity. These results clearly indicate that the activity of Pb3Nb2O8 can be improved to obtain an outstanding performance for the photodegradation of organic pollutants.展开更多
基金supported by the National Natural Science Foundation of China (11274150, 11574124)the Education Minister of Liaoning Province (JG2016ZD0015)the Open Research Fund of Jiangsu Provincial Key Laboratory for Nanotechnology Nanjing University~~
文摘Mesoporous Pb3Nb2O8 photocatalysts were synthesized by the evaporation‐induced self‐assembly (EISA) method. Ag was deposited on the surface of mesoporous Pb3Nb2O8 by a facile photoreduction process. The as‐prepared samples were characterized by TG‐DSC, XRD, N2 adsorption, HR‐TEM andUV‐Vis spectroscopy. The results revealed that mesoporous Pb3Nb2O8 has a large specific surfacearea and uniform pore size distribution both before and after Ag deposition. The photodegradationof 2‐propanol and acetaldehyde gas under visible‐light (λ > 420 nm) irradiation was employed toevaluate the photocatalytic activities of the samples. The results showed that the photocatalyticactivity of mesoporous Pb3Nb2O8 is greatly improved by the Ag co‐catalyst. These mesoporousPb3Nb2O8 exhibit photocatalytic activities as much as 41 times higher when compared with thePb3Nb2O8 prepared by the solid state reaction method. The content of loaded Ag ranged from 0.5%to 5% (Ag2SO4). The optimal loading was determined to be 1% corresponding the highest photocatalyti cactivity. These results clearly indicate that the activity of Pb3Nb2O8 can be improved to obtain an outstanding performance for the photodegradation of organic pollutants.
