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雾化热分解-氧化五羰基铁制备磁性氧化铁纳米粒子王新星1,2,张宝林1,2,王行展1,2,冯凌云1,21. 桂林理工大学广西有色金属及特色材料加工省部共建国家重点实验室培育基地2. 桂林理工大学材料科学与工程学院摘 要:通过雾化热分解-氧化五羰基铁(Fe(CO)5),在雾化液中添加三乙二醇(TREG)和三正辛基氧膦(TOPO),及在收集液中添加羧基化单甲醚聚乙二醇(MPEG-COOH)等有机修饰剂合成γ-Fe2O3纳米粒子.研究两段加热和单段加热对合成γ-Fe2O3纳米粒子的形貌,粒径,分散性的影响,同时分析温度对γ-Fe2O3纳米粒子结晶性,形貌及磁性能的影响.结果表明:合成的γ-Fe2O3纳米粒子结晶度随温度的升高而增加;MPEG-COOH已经修饰在γ-Fe2O3纳米粒子表面;在单段加热模式下温度为......
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基于锆铪溶剂萃取分离的萃取剂性能王俊莲,付家帅,许文,王化军北京科技大学土木与资源工程学院摘 要:溶剂萃取法是目前分离核级锆铪的主要方法.已工业化核级锆铪萃取分离技术MIBK(methyl isobutyl ketone,甲基异丁基酮)-硫氰化氢(HSCN)法,TBP(tributyl phosphate,磷酸三丁酯)-HNO3法和TOA(trioctyl amine,三辛基胺)-H2SO4法均存在不足.学者们一直在努力研究和开发新的萃取剂,以实现核级锆铪的绿色高效分离.总结了自2000年来基于锆铪分离的萃取剂性能研究.按照萃取剂的结构特征将其分为中性萃取剂,酸性萃取剂和胺类萃取剂.中性萃取剂包括酮类萃取剂DIBK(diisobutyl ketone,二异丁基酮)和三烷基氧膦类萃取剂TOPO......
(TOPO), tributylphosphine (TBP), hexadecylamine, dioctylamine, stearic acid, CdO, Se powder, hexamethyldisllathiane ((TMS)2S) and diethylzinc (Zn(Et)2) were purchased from Sigma-Aldrich..., and 0.114 0 g (0.4 mmol) stearic acid were added into a 25 mL three-neck flask and heated to 150 °C under Ar flow. After CdO was completely dissolved, the mixture was cooled to room temperature. TOPO......
the separation and extraction of Bi(III) from acid or highly acidic solutions of HCl using Cyanex 925 [13], tri-n-octyl phosphine oxide (TOPO) [14], 4-n-Octylaniline [15], 2-bromoalkanoic acid [16... and separation of Bi(III) and Sb(III) from HCl and HBr media using tri-n-octyl phosphine oxide (TOPO) [J]. Ind J Chem Technol, 2001, 8(4): 239-243. [15] KOKATE S J, SHELAR Y S, AHER H R, KUCHEKAR S R......
includes neutral oxygenated extractants, such as ketones, tributyl phosphate(TBP), triocytlphosphine oxide(TOPO), N-oxides, and sulfoxides. The other category includes long chain aliphatic and aromatic......
with TOPO, DPPHEN and TOPS [J]. Nuclear Techniques, 2004, 27(7): 547-550. (in Chinese) [11] HE Di-ping, HAN Wei-he, WANG Yu. Synergistic extraction of lanthanide by bis (1′-phenyl-3′-methyl-5′-pyrazolone-4......
]采用新型β-二酮类萃取剂Mextral54-100从Zn(Ⅱ)-NH4Cl-NH3配合物溶液中萃取锌,并对其萃取机理进行了深入探究.单独β-二酮的萃锌能力并不理想,协同萃取是可以提高锌萃取率的有效途径.FU等[25],CHEN等[26]和HU等[27]研究了高位阻β-二酮(1-苯基-4乙基-1,3-辛二酮)与TOPO组成的协同萃取体系从氨性体系中萃取分离锌,发现具有明显的协同效应,通过两级逆流萃取...-octylphosphine oxide (TOPO)[J]. Hydrometallurgy, 2011, 105: 201-206. [27] HU Jiu-gang, CHEN Qi-yuan, HU Hui-ping Hu, HU Feng-chun, CHEN Xiang, YIN Zhou-lan. Extraction enhancement of zinc(II) in ammoniacal media......
-4乙基-1,3-辛二酮)与TOPO组成的协同萃取体系从氨性体系中萃取分离锌,发现具有明显的协同效应,通过两级逆流萃取,锌萃取率为85%.HU等[29]采用高位阻的β-二酮(1- (4′-十二烷基)苯基-3-叔丁基-1,3-丙二酮)与CYANEX923或LIX84I组成的协同萃取体系从氨性溶液中萃取分离锌,发现该β-二酮与CYANEX923组合具有更明显的协同效应. 采用氨浸法处理非传统锌资源,矿... by a mixture of a sterically hindered beta-diketone and tri-n-octylphosphine oxide (TOPO)[J]. Hydrometallurgy, 2011, 105: 201-206. [28] HU Jiu-gang, CHEN Qi-yuan, HU Hui-ping Hu, HU Feng-chun, CHEN......
fragments were ligated into the vector PCR2.1 TOPO, then transformed into E. coli TOP10F’ competent cells according to the manufacturers’ instructions (Invitrogen). Recombinants were identified based......
