The magnetically separable ternary polyetherimide/titanate@Fe3O4(PTF) photocatalysts of special heterostructure between magnetite(Fe3O4) microspheres and titanates nanosheets modified by polyetherimide(PEI) were succe...The magnetically separable ternary polyetherimide/titanate@Fe3O4(PTF) photocatalysts of special heterostructure between magnetite(Fe3O4) microspheres and titanates nanosheets modified by polyetherimide(PEI) were successfully fabricated via a simple facile hydrothermal deposition method. The as-prepared photocatalysts were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, Transmission electron microscopy and UV-vis diffuse reflectance spectroscopy etc. The results showed that the as-fabricated material had a structure of Fe3O4microspheres coated with titanates nanosheets modified by PEI. The special interfacial contact between 3 D microsphere and 2 D nanosheets in the nanoarchitectures was formed via electrostatic attraction. Furthermore, the resulted photocatalysts were tested by degradation reaction of methylene blue under visible light irradiation and demonstrated an enhanced performance than the pure Fe3O4microspheres, and the photocatalytic activity enhanced with the molar ratio of Fe3O4microspheres and modified titanate gradually, which was attributed to the expansion of the surface area and the different electrostatic contact between the Fe3O4microspheres and titanate nanosheets. Moreover, the obtained results revealed the high yield magnetic separation and efficient reusability of PTF-5(96.7%) over 3 times reuse.展开更多
To enlargen tuning range in a single host material,we have simultaneously created(F_(2)^(+))Li^(+),H^(-)(F_(2)^(+))Na^(+),H color centers in KCl:Li^(+),Na^(+),OH^(-)crystal,whose emission wavelength covers from 1.45 t...To enlargen tuning range in a single host material,we have simultaneously created(F_(2)^(+))Li^(+),H^(-)(F_(2)^(+))Na^(+),H color centers in KCl:Li^(+),Na^(+),OH^(-)crystal,whose emission wavelength covers from 1.45 to 2.45μm.The experiments prove that two coexisting F_(2)^(+)-like centers in KCl have high concentration and good stability.展开更多
The heterostructures of In2O3 nanoparticle loaded on anatase TiO2 nanocube with exposed （001） facet （In2O3/TiO2-nanocube） were fabricated via a two-step hydrothermal process. The crystal phase, morphology, mi- cro...The heterostructures of In2O3 nanoparticle loaded on anatase TiO2 nanocube with exposed （001） facet （In2O3/TiO2-nanocube） were fabricated via a two-step hydrothermal process. The crystal phase, morphology, mi- cro-stnmture and photo-absorption property of the products were characterized by FESEM, TEM, XRD, and UV-Vis diffuse reflectance spectroscopy. The results showed that the percentage of exposed （001） facet of TiO2 nanocube was about 33%. In2O3 nanoparticles were successfully decorated on the surface of TiO2 nanocube to form the In2O3/TiO2 heterojtmction. Photocurrent measurements confirmed that （001） faceted surface was advantageous for the charge carrier migration and separation in the composites. In comparison with bare TiO2 nanocube and In2O3/TiO2-nanoparticle, the In2O3/TiO2-nanocube heterostructures exhibited enhanced activity toward the degradation of rhodamine B and tetracycline under visible light irradiation, which was attributed to the synergic effect of In2O3/TiO2 heterojunction and the exposure of （001） facet.展开更多
基金Funded by the National Natural Science Foundation of China(Nos.21103054,21003055,and 50872037)the Open Fund of Fujian Provincial Key Laboratory of Functional Materials and Applications(Xiamen University of Technology)(No.608160030215)the Program for Innovative Research Team in Science and Technology in Fujian Province University(IRTSTFJ)
文摘The magnetically separable ternary polyetherimide/titanate@Fe3O4(PTF) photocatalysts of special heterostructure between magnetite(Fe3O4) microspheres and titanates nanosheets modified by polyetherimide(PEI) were successfully fabricated via a simple facile hydrothermal deposition method. The as-prepared photocatalysts were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, Transmission electron microscopy and UV-vis diffuse reflectance spectroscopy etc. The results showed that the as-fabricated material had a structure of Fe3O4microspheres coated with titanates nanosheets modified by PEI. The special interfacial contact between 3 D microsphere and 2 D nanosheets in the nanoarchitectures was formed via electrostatic attraction. Furthermore, the resulted photocatalysts were tested by degradation reaction of methylene blue under visible light irradiation and demonstrated an enhanced performance than the pure Fe3O4microspheres, and the photocatalytic activity enhanced with the molar ratio of Fe3O4microspheres and modified titanate gradually, which was attributed to the expansion of the surface area and the different electrostatic contact between the Fe3O4microspheres and titanate nanosheets. Moreover, the obtained results revealed the high yield magnetic separation and efficient reusability of PTF-5(96.7%) over 3 times reuse.
文摘To enlargen tuning range in a single host material,we have simultaneously created(F_(2)^(+))Li^(+),H^(-)(F_(2)^(+))Na^(+),H color centers in KCl:Li^(+),Na^(+),OH^(-)crystal,whose emission wavelength covers from 1.45 to 2.45μm.The experiments prove that two coexisting F_(2)^(+)-like centers in KCl have high concentration and good stability.
基金Supported. by the National Natural Science Foundation of China（No.21103054）, the Natural Science Foundation of Fujian Province of China（Nos.2017J01014, 2012J05024） and the Promotion Program for Young and Middle-aged Teachers in Science and Technology Research of Huaqiao University, China（No.ZQN-PY206）.
文摘The heterostructures of In2O3 nanoparticle loaded on anatase TiO2 nanocube with exposed （001） facet （In2O3/TiO2-nanocube） were fabricated via a two-step hydrothermal process. The crystal phase, morphology, mi- cro-stnmture and photo-absorption property of the products were characterized by FESEM, TEM, XRD, and UV-Vis diffuse reflectance spectroscopy. The results showed that the percentage of exposed （001） facet of TiO2 nanocube was about 33%. In2O3 nanoparticles were successfully decorated on the surface of TiO2 nanocube to form the In2O3/TiO2 heterojtmction. Photocurrent measurements confirmed that （001） faceted surface was advantageous for the charge carrier migration and separation in the composites. In comparison with bare TiO2 nanocube and In2O3/TiO2-nanoparticle, the In2O3/TiO2-nanocube heterostructures exhibited enhanced activity toward the degradation of rhodamine B and tetracycline under visible light irradiation, which was attributed to the synergic effect of In2O3/TiO2 heterojunction and the exposure of （001） facet.
