论文部分内容阅读
在紫外光(2537A)作用下,由Tb(ClO_4)_3-Na_4P_2O_7-(NH_4)_2S_2O_8-HClO_4体系中制得了焦磷酸铽(Ⅳ)的沉淀。研究了光助氧化的反应级数及影响沉淀中Tb(Ⅳ)/∑Tb比值的因素。报道了焦磷酸铽(Ⅳ)的磁矩、热稳定性、红外光谱并分析了沉淀的组成及Tb(Ⅳ)和Tb(Ⅲ)混合物与其它镧系元素的分离因数。同时还对在酸性介质中生成焦磷酸铽(Ⅳ)配合物的吸收光谱、还原反应动力学进行了研究。
The precipitation of terbium pyrophosphate (Ⅳ) was prepared from Tb (ClO_4) _3-Na_4P_2O_7- (NH_4) _2S_2O_8-HClO_4 system by UV light (2537A). The reaction order of photooxidation and the factors influencing the ratio of Tb (Ⅳ) / ΣTb in the precipitate were investigated. The magnetic moment, thermal stability and infrared spectra of terbium pyrophosphate (Ⅳ) were reported. The composition of the precipitate and the separation factor of Tb (Ⅳ) and Tb (Ⅲ) mixtures with other lanthanides were also analyzed. At the same time, the absorption spectra of terbium pyrophosphate (Ⅳ) complex formed in acid medium and the kinetics of reduction reaction were also studied.