This paper presents The investigation of laser resonance ionization mass spectroscopy of lutetium with our laser ionization mass spectrometry system manufactured by our own. The optimum radius of laser focal spot over...This paper presents The investigation of laser resonance ionization mass spectroscopy of lutetium with our laser ionization mass spectrometry system manufactured by our own. The optimum radius of laser focal spot overlapped with atomic beam is calculated theoretical.Lutetium ionic signal at The rate of 1.8 ×105 s- 1is detected The Sample she of 1 μg lutetium.. With laser resonance ionization and The of atomizer,it is possible that The detection ho reaches 106 atoms. The effect of laser-induce isotopic discrimination on The measurement of isotope ratio is discussed. It is proposed that laser bandwidth and wavelength tuning effects are The main factors of deviation of lutetium isotopic ratios with this broad bandwidth laser.展开更多
The new ternary complex of [Lu(POA)3phen]n (POA is phenoxy acetic acid, phen is 1,10 phenanthroine) was synthesized and crystal structure was determined by X ray diffraction.The crystal structure belongs to monoclinic...The new ternary complex of [Lu(POA)3phen]n (POA is phenoxy acetic acid, phen is 1,10 phenanthroine) was synthesized and crystal structure was determined by X ray diffraction.The crystal structure belongs to monoclinic system with space group P21/n.a=20.394(3)? ,b=8.513(1)? , c=20.708(3)? ,β =107.70(1)° ,V=3425.1(8)? 3,Z=4,Dc=1.568Mg· m－ 3,μ (MoKα )=2.939mm－ 1. Each Lu3＋ ion is nine coodinated. Coordination polyhedron is a distorted trigonal prism. The carboxylate groups in the complex are bonded to the lutetium ion in the bridged bidentate and the bridged tridentate. Lutetium ions were linked by the bridged carboxylate groups, resulting in an infinite chain.展开更多
LuFeO3 crystallites of different sizes and morphologies were synthesized via a hydrothermal route. The sonocatalytic properties of the as-synthesized samples were investigated by degrading various organic dyes, includ...LuFeO3 crystallites of different sizes and morphologies were synthesized via a hydrothermal route. The sonocatalytic properties of the as-synthesized samples were investigated by degrading various organic dyes, including acid orange 7 （AOT）, rhodamine B （RhB）, methyl orange （MO）, and methylene blue （MB）, under ultrasonic irradiation, revealing that they exhibit excellent sonocatalytic activity toward the degradation of these dyes. Particularly, the synthesized bar-like particles with lengths of-3 μm and widths of-1μm have the highest sonocatalytic activity, and the degradation percentage of AO7 reaches 89% after 30 min of sonocatalysis. The effects of inorganic anions such as CI-, NO3-, SO42-, PO43-, and HCO3- on the sonocatalysis efficiency were investigated. Hydroxyl radicals （·OH） detected by fiuorimetry using terephthalic acid as a probe molecule were found to be produced over the ultrasonic-irradiated LuFeO3 particles. The addition of ethanol, which acts as a· OH scavenger, leads to quenching of ＂OH radicals and a simultaneous decrease in the dye degrada- tion. This suggests that ＂OH is the dominant active species responsible for the dye degradation.展开更多
This paper reports on the selective transport of Lu(Ⅲ)from La(III)and Sm(III)through a polymer inclusion membrane(PIM)composed of 40 wt%di(2-ethylhexyl)phosphinic acid(P227)and 60 wt%poly(vinylidene fluoride)(PVDF).B...This paper reports on the selective transport of Lu(Ⅲ)from La(III)and Sm(III)through a polymer inclusion membrane(PIM)composed of 40 wt%di(2-ethylhexyl)phosphinic acid(P227)and 60 wt%poly(vinylidene fluoride)(PVDF).Basically,the changes in surface morphology,thickness and water contact angle of this PVDF-based PIM containing P227(P227@PVDF PIM)with different polymer concentrations were investigated.By solvent extraction experiments,it is found that Lu(Ⅲ)can be selectively extracted from La(Ⅲ)and Sm(Ⅲ)at pH 1.5 in hydrochloric acid solution.According to this result,P227@PVDF PIM was used to selectively transport Lu(Ⅲ)from hydrochloric acid feed solution containing similar concentration of La(Ⅲ)and Sm(Ⅲ).The recovery factor of Lu(III)is 91% after 36 h,and about 5%of Sm(Ⅲ)was also transported through the PIM.The concentration of La(III)in the feed solution and the stripping solution does not change.Furthermore,to overcome the ubiquitous decline of transport efficiency caused by the loss of carrier or the damage of membrane structure after long-term use of PIMs,a process for regenerating PIMs was first proposed and implemented.By comparison of the regenerated PIM with the normal PIM,there is almost no difference in the SEM image,ATR-FTIR spectrum and Lu(III)transport efficiency.It is expected that P227@PVDF PIMs have the potential to be applied to the grouped separation of rare earth elements(REEs),and this study also can be as an inspiration for the further study on the PIMs regeneration process.展开更多
文摘This paper presents The investigation of laser resonance ionization mass spectroscopy of lutetium with our laser ionization mass spectrometry system manufactured by our own. The optimum radius of laser focal spot overlapped with atomic beam is calculated theoretical.Lutetium ionic signal at The rate of 1.8 ×105 s- 1is detected The Sample she of 1 μg lutetium.. With laser resonance ionization and The of atomizer,it is possible that The detection ho reaches 106 atoms. The effect of laser-induce isotopic discrimination on The measurement of isotope ratio is discussed. It is proposed that laser bandwidth and wavelength tuning effects are The main factors of deviation of lutetium isotopic ratios with this broad bandwidth laser.
文摘The new ternary complex of [Lu(POA)3phen]n (POA is phenoxy acetic acid, phen is 1,10 phenanthroine) was synthesized and crystal structure was determined by X ray diffraction.The crystal structure belongs to monoclinic system with space group P21/n.a=20.394(3)? ,b=8.513(1)? , c=20.708(3)? ,β =107.70(1)° ,V=3425.1(8)? 3,Z=4,Dc=1.568Mg· m－ 3,μ (MoKα )=2.939mm－ 1. Each Lu3＋ ion is nine coodinated. Coordination polyhedron is a distorted trigonal prism. The carboxylate groups in the complex are bonded to the lutetium ion in the bridged bidentate and the bridged tridentate. Lutetium ions were linked by the bridged carboxylate groups, resulting in an infinite chain.
基金supported by the National Natural Science Foundation of China(51262018)the Fundamental Research Funds for Universities of Gansu Province(056003)the Hongliu Outstanding Talents Foundation of Lanzhou University of Technology(J201205)~~
文摘LuFeO3 crystallites of different sizes and morphologies were synthesized via a hydrothermal route. The sonocatalytic properties of the as-synthesized samples were investigated by degrading various organic dyes, including acid orange 7 （AOT）, rhodamine B （RhB）, methyl orange （MO）, and methylene blue （MB）, under ultrasonic irradiation, revealing that they exhibit excellent sonocatalytic activity toward the degradation of these dyes. Particularly, the synthesized bar-like particles with lengths of-3 μm and widths of-1μm have the highest sonocatalytic activity, and the degradation percentage of AO7 reaches 89% after 30 min of sonocatalysis. The effects of inorganic anions such as CI-, NO3-, SO42-, PO43-, and HCO3- on the sonocatalysis efficiency were investigated. Hydroxyl radicals （·OH） detected by fiuorimetry using terephthalic acid as a probe molecule were found to be produced over the ultrasonic-irradiated LuFeO3 particles. The addition of ethanol, which acts as a· OH scavenger, leads to quenching of ＂OH radicals and a simultaneous decrease in the dye degrada- tion. This suggests that ＂OH is the dominant active species responsible for the dye degradation.
基金supported by the National Basic Research Program of China(2012CBA01202)the National Natural Science Foundation of China(51174184)the Key Research Program of the Chinese Academy of Sciences(KGZD-EW-201-1)。
文摘This paper reports on the selective transport of Lu(Ⅲ)from La(III)and Sm(III)through a polymer inclusion membrane(PIM)composed of 40 wt%di(2-ethylhexyl)phosphinic acid(P227)and 60 wt%poly(vinylidene fluoride)(PVDF).Basically,the changes in surface morphology,thickness and water contact angle of this PVDF-based PIM containing P227(P227@PVDF PIM)with different polymer concentrations were investigated.By solvent extraction experiments,it is found that Lu(Ⅲ)can be selectively extracted from La(Ⅲ)and Sm(Ⅲ)at pH 1.5 in hydrochloric acid solution.According to this result,P227@PVDF PIM was used to selectively transport Lu(Ⅲ)from hydrochloric acid feed solution containing similar concentration of La(Ⅲ)and Sm(Ⅲ).The recovery factor of Lu(III)is 91% after 36 h,and about 5%of Sm(Ⅲ)was also transported through the PIM.The concentration of La(III)in the feed solution and the stripping solution does not change.Furthermore,to overcome the ubiquitous decline of transport efficiency caused by the loss of carrier or the damage of membrane structure after long-term use of PIMs,a process for regenerating PIMs was first proposed and implemented.By comparison of the regenerated PIM with the normal PIM,there is almost no difference in the SEM image,ATR-FTIR spectrum and Lu(III)transport efficiency.It is expected that P227@PVDF PIMs have the potential to be applied to the grouped separation of rare earth elements(REEs),and this study also can be as an inspiration for the further study on the PIMs regeneration process.
