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
NaCl(OH^(-)):(F_(2)^(+))is a color center laser crystaJ with best laser performance and imPortant applications at Present.We have succeeded in develoPing this crystal and realizing its laser operation.For raising the ...NaCl(OH^(-)):(F_(2)^(+))is a color center laser crystaJ with best laser performance and imPortant applications at Present.We have succeeded in develoPing this crystal and realizing its laser operation.For raising the concentration and the stability of(F_(2)^(+))center,we have studied its route of formation,state,and control of conditions,with fairly good results as follows:The doping of OH facilitates the formation of high-order aggregated center in crystal during co-loration.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.
文摘NaCl(OH^(-)):(F_(2)^(+))is a color center laser crystaJ with best laser performance and imPortant applications at Present.We have succeeded in develoPing this crystal and realizing its laser operation.For raising the concentration and the stability of(F_(2)^(+))center,we have studied its route of formation,state,and control of conditions,with fairly good results as follows:The doping of OH facilitates the formation of high-order aggregated center in crystal during co-loration.
