Mesoporous silica hollow spheres with a homogenous and high content distribution of Fe and Co were synthesized by a facile one-pot hydrothermal process. The sub-nanometer bimetallic components inside the silica framew...Mesoporous silica hollow spheres with a homogenous and high content distribution of Fe and Co were synthesized by a facile one-pot hydrothermal process. The sub-nanometer bimetallic components inside the silica framework facilitate the stable fixation and the open accessibility to active sites. The co-doped Fe/Co in the spheres showed excellent peroxidase-like activity and much higher catalytic performance than their monometallic-supported spheres. The synergistic effect between Fe and Co promotes the continuous formation of functional radicals during the oxidation process and thus accelerates the reaction rate. When used for colorimetric detection of hydrogen peroxide(H_(2)O_(2)), the Fe/Co incorporated silica hollow spheres show the capability of detection of H_(2)O_(2) in a wide range(10-250 μmol/L) and with the low detection limit of 0.012 ppm.展开更多
TiO_(2)-based films are one of the most attractive photocatalysts owing to their highly cost-effective properties.Nevertheless,most TiO_(2)-based photocatalytic films for dye degradation are in the form of robust film...TiO_(2)-based films are one of the most attractive photocatalysts owing to their highly cost-effective properties.Nevertheless,most TiO_(2)-based photocatalytic films for dye degradation are in the form of robust films(without flexibility),TiO_(2)coatings on carbon matrix(with leakage risk),or surface-covered TiO_(2)hybrids(not favorite to contact with external molecules).Therefore,the development of durable and highly efficient TiO_(2)photocatalytic films for dye degradation is still needed.Here,we fabricated soft photocatalytic hybrid membranes(TANFs)from TiO_(2)nanotubes(Ti NT)and aramid nanofiber(ANF)by a facile vacuum filtration process.The similar morphology and dimension of Ti NT and ANF enable them intricately intertwine with each other in the membrane network.Under an appropriate mixing ratio,the TANF exhibited significantly improved optical and mechanical properties.When used for dye degradation,the membrane showed excellent photocatalytic performance and could keep stable activity and integrated state for repeated usage.展开更多
基金financial supports from the Instrument & Equipment Open Funding of Nanjing University of Science and TechnologyNational Natural Science Foundation of China (No. 21875108)the Fundamental Research Funds for the Central Universities (No. 30921013106)。
文摘Mesoporous silica hollow spheres with a homogenous and high content distribution of Fe and Co were synthesized by a facile one-pot hydrothermal process. The sub-nanometer bimetallic components inside the silica framework facilitate the stable fixation and the open accessibility to active sites. The co-doped Fe/Co in the spheres showed excellent peroxidase-like activity and much higher catalytic performance than their monometallic-supported spheres. The synergistic effect between Fe and Co promotes the continuous formation of functional radicals during the oxidation process and thus accelerates the reaction rate. When used for colorimetric detection of hydrogen peroxide(H_(2)O_(2)), the Fe/Co incorporated silica hollow spheres show the capability of detection of H_(2)O_(2) in a wide range(10-250 μmol/L) and with the low detection limit of 0.012 ppm.
基金the financial supports from the Instrument&Equipment Open Funding of Nanjing University of Science and TechnologyNational Natural Science Foundation of China(Nos.21875108 and 22105103)+3 种基金the Natural Science Foundation of Jiangsu Province(No.BK20200471)the Fundamental Research Funds for the Central Universities(No.30921013106)the technical cooperation project with Nantong Junjiang Material Science and Technology Co.,Ltd.(No.2022320104001955)the Key R&D Project of Shanxi Province(No.2022JBGS3–12)。
文摘TiO_(2)-based films are one of the most attractive photocatalysts owing to their highly cost-effective properties.Nevertheless,most TiO_(2)-based photocatalytic films for dye degradation are in the form of robust films(without flexibility),TiO_(2)coatings on carbon matrix(with leakage risk),or surface-covered TiO_(2)hybrids(not favorite to contact with external molecules).Therefore,the development of durable and highly efficient TiO_(2)photocatalytic films for dye degradation is still needed.Here,we fabricated soft photocatalytic hybrid membranes(TANFs)from TiO_(2)nanotubes(Ti NT)and aramid nanofiber(ANF)by a facile vacuum filtration process.The similar morphology and dimension of Ti NT and ANF enable them intricately intertwine with each other in the membrane network.Under an appropriate mixing ratio,the TANF exhibited significantly improved optical and mechanical properties.When used for dye degradation,the membrane showed excellent photocatalytic performance and could keep stable activity and integrated state for repeated usage.
