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以过二硫酸钾为氧化剂,在Ag~+的催化作用下,从碱性溶液中制得了暗红棕色颗粒状易过滤的四价(钅贰)的水合氧化物,研完了影响Tb(Ⅲ)氧化率的诸因素(碱度,温度,加热时间,氧化剂及催化剂用量),通过化学分析,x—射线物相分析,磁化率及化学性质的研究,证明所得化合物中有Tb(Ⅳ)存在,通过差热和热重法研究了含Tb(Ⅳ)的水合氧化物的热稳定性并与同样条件下制得的Tb(Ⅲ)水合氧化物进行了比较,研究了Tb(Ⅳ)化合物的红外光谱并与Tb(Ⅲ)的相应化合物进行了比较,发现Tb(Ⅳ)化合物在1380cm~(-1)处出现较锐的吸收峰且随样品中Tb(Ⅳ)含量的增加其吸收峰变得更锐,这与Tb(Ⅲ)在同一位置处的宽带吸收不同,因而可认为与Tb(Ⅳ)的存在有关。
Under the catalysis of Ag ~ +, potassium peroxodisulfate was used as the oxidant to make the dark reddish brown granule easily filtered tetravalent hydrate oxide from alkali solution. The results of chemical analysis, x-ray phase analysis, magnetic susceptibility and chemical properties show that Tb (Ⅳ) exists in the obtained compounds, and the oxidation rate (alkalinity, temperature, heating time, oxidant and catalyst dosage) The thermal stability of Tb (Ⅳ) -containing hydrous oxide was studied by differential thermal and thermogravimetric methods and compared with that of Tb (Ⅲ) hydrate prepared under the same conditions. The effects of infrared Spectra and the Tb (Ⅲ) compounds were compared and found Tb (Ⅳ) compounds appear sharp absorption peak at 1380cm -1 (-1) with the sample Tb (Ⅳ) content increases its absorption peak becomes Which is different from the absorption of Tb (Ⅲ) at the same position, which is considered to be related to the existence of Tb (Ⅳ).