The extraction separation of germanium from indium raffinate in hydrometallurgical zinc process was discussed. The conditions and mechanism of the extraction with hydroxamic acid HGS98 have been investigated in detail...The extraction separation of germanium from indium raffinate in hydrometallurgical zinc process was discussed. The conditions and mechanism of the extraction with hydroxamic acid HGS98 have been investigated in detail. The results show that u sing 2% (mass fraction) hydroxamic acid HGS98 and 5% D 2EHPA as synergist, germanium is extracted (1 stage) over 99% in 5 min at phase ratio ( V o∶ V a) of 1∶5 from indium raffinate with original acidity. Then, using 2 mol·L -1 NH 4F as strip liquor, the stripping recovery is over 98% in 15 min at phase ratio of 1∶1. This process has the following advantages:easy to operate, high recovery and selectivity, and lower investment cost. It provides a new way to recover rare metal-germanium from metallurgical spent residues.展开更多
Polyurethane-conjugated HgS nanocrystals with tunable sizes prepared by using biomimetic method. The obtained HgS nanoparticles with good dispersibility were characterized by Fourier transform infrared. Scanning elect...Polyurethane-conjugated HgS nanocrystals with tunable sizes prepared by using biomimetic method. The obtained HgS nanoparticles with good dispersibility were characterized by Fourier transform infrared. Scanning electron microscopy are used to envisage the binding of nanoparticles with functional groups. The polyurethane molecules can control nucleation and growth of HgS crystals by binding on the surface of nanocrystals to stabilize nanoparticles. Quantum confinement effect of polyurethane-conjugated HgS nanocrystals was confirmed by UV-Vis spectra. The nanoparticles exhibit a well-defined emission feature at about 291 nm. The fluorescence results reveal that the PU/HgS nanoparticles film is sensitive to Ba2＋, and a small amount of Ba2＋ makes the emissions increase rapidly. The emission is hardly affected by other common ions in water. The nanocomposite film is possible to become a special sensor material for Ba2＋.展开更多
With in situ electrical resistivity and Hall effect measurement, the transport properties and carrier behavior of β-HgS under high pressure are investigated up to 32.9 GPa. The electrieal resistivity changes disconti...With in situ electrical resistivity and Hall effect measurement, the transport properties and carrier behavior of β-HgS under high pressure are investigated up to 32.9 GPa. The electrieal resistivity changes discontinuously at 5.4, 14.6, and 25.0 GPa. These discontinuities correspond to the phase transitions of β-HgS from zinc blende to cinnabar, then to rock salt structure. For the zinc blende structure, the decrease of carrier concentration and the increase of mobility indicate that the originally overlapped valence band and conduction band separate with pressure. For the rock salt phase, the increase of ionized impurity concentration leads to the decrease of mobility with pressure.展开更多
Human Genome Sciences(HGS)公司已经与GSK公司达成一项交易，交易价值高达1．83亿美元。HGS许可GSK在世界范围内可以独家开发和商业化Albugon(白蛋白-高血糖素样肽-1，GLP-1)(Ⅰ)，GSK已使该药进入了临床前最后阶段的研究，并且表示该...Human Genome Sciences(HGS)公司已经与GSK公司达成一项交易，交易价值高达1．83亿美元。HGS许可GSK在世界范围内可以独家开发和商业化Albugon(白蛋白-高血糖素样肽-1，GLP-1)(Ⅰ)，GSK已使该药进入了临床前最后阶段的研究，并且表示该药有治疗糖尿病的可能。展开更多
文摘The extraction separation of germanium from indium raffinate in hydrometallurgical zinc process was discussed. The conditions and mechanism of the extraction with hydroxamic acid HGS98 have been investigated in detail. The results show that u sing 2% (mass fraction) hydroxamic acid HGS98 and 5% D 2EHPA as synergist, germanium is extracted (1 stage) over 99% in 5 min at phase ratio ( V o∶ V a) of 1∶5 from indium raffinate with original acidity. Then, using 2 mol·L -1 NH 4F as strip liquor, the stripping recovery is over 98% in 15 min at phase ratio of 1∶1. This process has the following advantages:easy to operate, high recovery and selectivity, and lower investment cost. It provides a new way to recover rare metal-germanium from metallurgical spent residues.
基金This work was supported by the National Natural Science Foundation of China （No.21102121）, the Shaanxi Province Council （No.2014JQ2077）, the China＇s Scholarship Council （No.2013JK0643）, and the Xianyang Normal University Council （No.13XSYK021）.
文摘Polyurethane-conjugated HgS nanocrystals with tunable sizes prepared by using biomimetic method. The obtained HgS nanoparticles with good dispersibility were characterized by Fourier transform infrared. Scanning electron microscopy are used to envisage the binding of nanoparticles with functional groups. The polyurethane molecules can control nucleation and growth of HgS crystals by binding on the surface of nanocrystals to stabilize nanoparticles. Quantum confinement effect of polyurethane-conjugated HgS nanocrystals was confirmed by UV-Vis spectra. The nanoparticles exhibit a well-defined emission feature at about 291 nm. The fluorescence results reveal that the PU/HgS nanoparticles film is sensitive to Ba2＋, and a small amount of Ba2＋ makes the emissions increase rapidly. The emission is hardly affected by other common ions in water. The nanocomposite film is possible to become a special sensor material for Ba2＋.
基金Supported by the National Basic Research Program of China under Grant No 2011CB808204the National Natural Science Foundation of China under Grant Nos 51479220,11374121,11074094+3 种基金91014004the National Youth Program Foundation of China under Grant No 11404137the Program for the Development of Science and Technology of Jilin Province under Grant Nos201201079 and 201215222the Open Project Program of National Laboratory of Superhard Materials under Grant No 201208
文摘With in situ electrical resistivity and Hall effect measurement, the transport properties and carrier behavior of β-HgS under high pressure are investigated up to 32.9 GPa. The electrieal resistivity changes discontinuously at 5.4, 14.6, and 25.0 GPa. These discontinuities correspond to the phase transitions of β-HgS from zinc blende to cinnabar, then to rock salt structure. For the zinc blende structure, the decrease of carrier concentration and the increase of mobility indicate that the originally overlapped valence band and conduction band separate with pressure. For the rock salt phase, the increase of ionized impurity concentration leads to the decrease of mobility with pressure.
