Preparation of Gd-Co alloy film in acetamide-urea-NaBr melt

Electroreduction of Co(Ⅱ） to metallic Co in acetamide-urea-NaBr metl at 353K is irreversible in one step.Gd(Ⅲ） is not reduced to Gd alone,but can be inductively codeposited with Co(Ⅱ.The amorphous Gd-Co alloy films were obtained by potentiostatic electrolysis.With the cathode potential shifting to negative direction.the content of gadolinium in the alloy increases and can get to 65.89%(mass fraction).The additive of Na2EDTA can make the diameter of the particles of crystalline alloy smaller and change the shape of particles.     

Preparation of Gd-Ni alloy film in urea-NaBr melt

1　ＩＮＴＲＯＤＵＣＴＩＯＮＧｄｉｎ 4ｆｌａｎｔｈａｎｏｉｄｈａｓｆｅｒｒｏｍａｇｎｅｔｉｃ ｐａｒａｍａｇ ｎｅｔｉｓｍｔｒａｎｓｆｏｒｍｔｅｍｐｅｒａｔｕｒｅ (Ｃｕｒｉｅｐｏｉｎｔ) ,ａｎｄｔｈｅｈｉｇｈｅｓｔｍａｇｎｅｔｉｃｔｈｅｒｍａｌｅｎｔｒｏｐｙｃｈａｎｇｅｓａｔｒｏｏｍｔｅｍｐｅｒａｔｕｒｅ .Ｓｏｆａｒ ,ｉｔｉｓｓｔｉｌｌｔｈｅｂｅｓｔｍａｇｎｅｔｉｃｒｅ ｆｒｉｇｅｒａｔｉｏｎｗｏｒｋｉｎｇｓｕｂｓｔａｎｃｅｍａｔｅｒｉａｌａｔｒｏｏｍｔｅｍ ｐｅｒａｔｕｒｅ .Ｎｏｗｒａｒｅｅａｒｔｈ…     

乙酰胺-尿素-NaBr熔体中Gd-Co合金膜的电沉积研究

利用循环伏安法和恒电位电解法探讨了353K时乙酰胺．尿素(26．7%，质量分数)-NaBr(12．0％，质量分数)熔体体系中Gd-Co合金膜的电化学制备。研究了沉积时的电流密度、时间、温度以及Gd(Ⅲ)/Co(Ⅱ)浓度比对沉积膜质量的影响。结果表明，在乙酰胺-尿素(26．7％)-NaBr(12．0％)熔体中，控制恰当的体系组成和沉积条件，均可得到表面均匀、附着力强、有金属光泽的灰黑色非晶态Gd-Co合金膜，其中Gd的质量分数可达4．92％～85．89％，所得到的沉积膜通过SEM，EDS和XRD进行了分析。     

Preparation of Y-Co alloy film in acetamide-urea-NaBr melt

1　ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｒａｒｅｅａｒｔｈ ｃｏｂａｌｔａｌｌｏｙｓｈａｖｅｍａｎｙｓｐｅｃｉａｌｐｒｏｐｅｒｔｉｅｓａｎｄｃａｎｂｅｕｓｅｄｔｏｐｒｅｐａｒｅｍａｇｎｅｔｉｃａｎｄｍａｇ ｎｅｔｏ ｏｐｔｉｃａｌｃｏｍｐｏｎｅｎｔｓ.Ｓｏｆａｒ,ｒａｒｅｅａｒｔｈａｌｌｏｙｆｉｌｍｓｈａｖｅｕｓｕａｌｌｙｂｅｅｎｐｒｏｄｕｃｅｄｂｙｓｐｕｔｔｅｒｉｎｇｏｒｖａｃｕｕｍｐｌａｔｉｎｇ .Ｉｆｓｕｃｈｔｈｉｎｆｉｌｍｓｗｅｒｅｐｒｅｐａｒｅｄｂｙｅｌｅｃｔｒｏｄｅｐｏ ｓｉｔｉｏｎ,ｔｈｅｐｒｏｄ…     

碱性溶液中醇在Pd电极上失去电子数研究

用循环伏安法研究了碱性条件下甲醇、乙醇和异丙醇在Pd电极上氧化失去电子能力.甲醇和乙醇氧化是失去6个和4个电子.异丙醇容易失去2个电子氧化为丙酮,丙酮会进一步氧化,但氧化程度很低.乙醇和异丙醇在低于-0.4V范围内失去电子数比不上甲醇,但在-0.9到-0.4V的积分电量是甲醇的19.1和41.2倍.说明了乙醇和异丙醇在...     

Electrochemical Behavior of Er(Ⅲ）In N,N-dimethylformamide

The cyclic voltammetry, current-time curve at potential step and potential-time curve of galvanostatic method were used to investigate the electrochemical behavior of Er(Ⅲ) in ErCl3-LiClO4-DMF(N, N-dimethylformamide) system on Pt and Cu electrodes. Results indicate that the electroreducation of Er(Ⅲ) to Er(0) is irreversible on Pt and Cu electrodes, the diffusion coefficient and electron transfer coefficient of Er(Ⅲ) in 0.01mol/L ErCl3-0.1mol/L LiClO4-DMF system at 303K are 1.96×10-6 cm2*s-1 and 0.081 respectively. The Er metal film was prepared by galvanostatic electrolysis on Cu electrode in ErCl3-LiClO4-DMF system at 40A*m-2(current density). The deposites composed of Er over 95%(mass fraction) were obtained.     

罗丹明B与二元混合表面活性剂的荧光光谱

荧光光谱法与高斯多峰拟合方法结合研究十二烷基苯磺酸钠(Sodium dodecyl benzene sulfonate,SDBS)和烷基糖苷(APG)在不同混合状态下的聚集行为。以罗丹明B为探针,固定混合表面活性剂体系中APG浓度为4.0×10~(-5)mol·L~(-1),测量体系随十二烷基苯磺酸钠(SDBS)浓度变化的荧光发射光谱。其光谱特征是罗丹明B分子二聚体发射峰和单体发射峰叠合在一起。用高斯多峰拟合实现了体系荧光发射光谱叠合峰的分峰,通过分峰后所得参数与SDBS浓度关系图,可求得混合表面活性剂体系的临界胶束浓度。