论文部分内容阅读
于含Tb(Ⅲ)的六偏磷酸钠碱性溶液中通入臭氧,则Tb(Ⅲ)被氧化成四价,溶液的颜色由无色变为红棕色,化学分析及吸收光谱证实溶液中有Tb(Ⅳ)生成,Tb(Ⅳ)溶液在320—500nm波长范围内有特征的宽带吸收最大吸收位于365nm处,动力学研究表明,Tb(Ⅳ)在容液中的还原反应服从一级反应动力学方程,速率常数(k)及半还原期(t_(1/2)随PH而变,由溶液中析出了含Tb(Ⅳ)的固态化合物,通过电泳及离子交换反应,证明所得化合物中Tb(Ⅳ)以络阴离子形式存在。
When Tb (Ⅲ) is oxidized to tetravalent in alkaline solution of sodium hexametaphosphate containing Tb (Ⅲ), the color of the solution changes from colorless to reddish brown. The chemical analysis and absorption spectra confirm that there is Tb (Ⅳ). The maximum absorption of Tb (Ⅳ) in the wavelength range of 320-500nm is located at 365nm. The kinetic studies show that the reduction reaction of Tb (Ⅳ) in the solution follows the first order reaction kinetics The equation of the equation, the rate constant (k) and the half-reduction period (t_ (1/2)) vary with the pH and the solid compounds containing Tb (Ⅳ) are precipitated from the solution. The results of electrophoresis and ion- (Ⅳ) exists as a complex anion.