A novel green nanophosphor CaHPO4：Tb3＋ was synthesized via a room-temperatureco-precipitation route driven by ethanol solvent. X-ray powder diffraction （XRD）, scanningelectron microscopy （SEM） and photoluminesce...A novel green nanophosphor CaHPO4：Tb3＋ was synthesized via a room-temperatureco-precipitation route driven by ethanol solvent. X-ray powder diffraction （XRD）, scanningelectron microscopy （SEM） and photoluminescence spectroscopy （PL） techniques were utilizedto characterize the structure, morphology and fluorescence performance of the obtained powders.The results demonstrated that the prepared samples were well crystallized with triclinic phaseCaHPO4 structure and particle-like morphology. Photoluminescence measurements indicated thatCaHPOa：Tb3＋ had a strong absorption peak at 370 nm and exhibited characteristic emissions withseveral sharp peaks corresponding to the transitions 5D4-7FJ （jr = 6-3） of Tb3＋. Moreover, theluminescence optimum concentration for CaHPO4：Tb3＋ was determined to be 11 mol%, whichmight be a promising green-emitting ohosohor for display applications.展开更多
Uniform and well-dispersed Zn S nanospheres have been successfully synthesized via a facile chemical route. The crystal structure, morphology, surface area and photocatalytic properties of the sample were characterize...Uniform and well-dispersed Zn S nanospheres have been successfully synthesized via a facile chemical route. The crystal structure, morphology, surface area and photocatalytic properties of the sample were characterized by powder X-ray diffraction（XRD）, scanning electron microscopy（SEM）, Brunauer-Emmett-Teller（BET） and ultraviolet-visible（UV-vis） spectrum. The results of characterizations indicate that the products are identified as mesoporous zinc-blende ZnS nanospheres with an average diameter of 200 nm, which are comprised of nanoparticles with the crystallite size of about 3.2 nm calculated by XRD. Very importantly, photocatalytic degradation of methylene blue（MB） shows that the as-prepared Zn S nanospheres exhibit excellent photocatalytic activity with nearly 100% of MB decomposed after UV-light irradiation for 25 min. The excellent photocatalytic activity of ZnS nanospheres can be ascribed to the large specific surface area and hierarchical mesoporous structure.展开更多
基金supported by the National Natural Science Foundation of China(21663021)China Postdoctoral Science Foundation(2015M571977)+1 种基金the Natural Science Foundation of Jiangxi Province(20161BAB213058)the Natural Science Key Project of Jiangxi Province(2017ACB20040)
文摘A novel green nanophosphor CaHPO4：Tb3＋ was synthesized via a room-temperatureco-precipitation route driven by ethanol solvent. X-ray powder diffraction （XRD）, scanningelectron microscopy （SEM） and photoluminescence spectroscopy （PL） techniques were utilizedto characterize the structure, morphology and fluorescence performance of the obtained powders.The results demonstrated that the prepared samples were well crystallized with triclinic phaseCaHPO4 structure and particle-like morphology. Photoluminescence measurements indicated thatCaHPOa：Tb3＋ had a strong absorption peak at 370 nm and exhibited characteristic emissions withseveral sharp peaks corresponding to the transitions 5D4-7FJ （jr = 6-3） of Tb3＋. Moreover, theluminescence optimum concentration for CaHPO4：Tb3＋ was determined to be 11 mol%, whichmight be a promising green-emitting ohosohor for display applications.
基金supported by the National Natural Science Foundation of China(21663021)the Natural Science Key Project of Jiangxi Province(2017ACB20040)the Natural Science Foundation of Jiangxi Province(20161BAB213058)
文摘Uniform and well-dispersed Zn S nanospheres have been successfully synthesized via a facile chemical route. The crystal structure, morphology, surface area and photocatalytic properties of the sample were characterized by powder X-ray diffraction（XRD）, scanning electron microscopy（SEM）, Brunauer-Emmett-Teller（BET） and ultraviolet-visible（UV-vis） spectrum. The results of characterizations indicate that the products are identified as mesoporous zinc-blende ZnS nanospheres with an average diameter of 200 nm, which are comprised of nanoparticles with the crystallite size of about 3.2 nm calculated by XRD. Very importantly, photocatalytic degradation of methylene blue（MB） shows that the as-prepared Zn S nanospheres exhibit excellent photocatalytic activity with nearly 100% of MB decomposed after UV-light irradiation for 25 min. The excellent photocatalytic activity of ZnS nanospheres can be ascribed to the large specific surface area and hierarchical mesoporous structure.
