Maximizing adsorption and catalytic active sites and promoting the photo-excited charge separation are two key factors to achieve excellent photocatalytic performance.In this study,we report a sol-gel synthesis approa...Maximizing adsorption and catalytic active sites and promoting the photo-excited charge separation are two key factors to achieve excellent photocatalytic performance.In this study,we report a sol-gel synthesis approach to obtain non-metal doped TiO_(2)with sponge-like structure and surface-phase junctions all at once.While doping of carbon and nitrogen shifted the activation wavelength to the visible-light region,the innovative use of perchloric acid as a pore-making agent led to the formation of three-dimensional lamellar and porous structure with surface-phase junctions.High surface area with catalytic active sites rendered by the sponge-like structure and surface-phase junctions contributed to the much improved photocatalytic degradation efficiency toward rhodamine B,tetracycline and Disperse Red 60 with excellent reusability and stability.The improved gen eration and separati on efficie ncy of the photo-induced charge carriers of the as-prepared TiO_(2)were supported by electrochemical impedance measurements and transient photocurrent responses.This method could also be applied to other photocatalysts to achieve structural alteration and element doping simultaneously.展开更多
基金This work was supported by National Key Research and Development Program of China(No.2018YFC1803100)National Natural Science Foundation of China(No.21777116)the Fundamental Research Funds for the Central Universities.
文摘Maximizing adsorption and catalytic active sites and promoting the photo-excited charge separation are two key factors to achieve excellent photocatalytic performance.In this study,we report a sol-gel synthesis approach to obtain non-metal doped TiO_(2)with sponge-like structure and surface-phase junctions all at once.While doping of carbon and nitrogen shifted the activation wavelength to the visible-light region,the innovative use of perchloric acid as a pore-making agent led to the formation of three-dimensional lamellar and porous structure with surface-phase junctions.High surface area with catalytic active sites rendered by the sponge-like structure and surface-phase junctions contributed to the much improved photocatalytic degradation efficiency toward rhodamine B,tetracycline and Disperse Red 60 with excellent reusability and stability.The improved gen eration and separati on efficie ncy of the photo-induced charge carriers of the as-prepared TiO_(2)were supported by electrochemical impedance measurements and transient photocurrent responses.This method could also be applied to other photocatalysts to achieve structural alteration and element doping simultaneously.
