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采用共沉淀法合成了具有不同Cu/Co/Mg比例的Cu/Co/Mg/Al四元类水滑石(HTlcs)。对合成样品的结构用XRD,IR,ICP,TG-DTA进行表征分析,并与先期合成的二元类Mg/Al-HTlcs及三元类Co/Mg/Al-HTlcs进行结构差异的比较分析。XRD和IR结果表明,合成的样品均具有完整的水滑石结构且结晶度良好晶像单一,层间距由二元类(Mg/Al-HTlcs)的0.750nm扩大到四元类(Cu/Co/Mg/Al-HTlcs)的0.785nm。TG-DTA分析表明,合成样品的热分解过程均可分为2个阶段,其热分解温度由二元类(Mg/Al-HTlcs为250～390℃)到四元类(Cu/Co/Mg/Al-HTlcs的180～300℃)依次递减。
Cu / Co / Mg / Al ternary hydrotalcites (HTlcs) with different Cu / Co / Mg ratios were synthesized by coprecipitation method. The structures of the synthesized samples were characterized by XRD, IR, ICP and TG-DTA. The structures of the synthesized samples were compared with the binary Mg / Al-HTlcs and ternary Co / Mg / Al-HTlcs. XRD and IR results show that the synthesized samples all have a complete hydrotalcite structure with good crystallinity and a single crystallographic image. The interlayer spacing is expanded from 0.750 nm to Cu / Co / Cu of the binary (Mg / Al-HTlcs) Mg / Al-HTlcs) 0.785 nm. TG-DTA analysis showed that the thermal decomposition process of the synthesized samples can be divided into two stages, the thermal decomposition temperature of the binary class (Mg / Al-HTlcs 250 ~ 390 ℃) to quaternary (Cu / Co / Mg / Al-HTlcs 180 ~ 300 ℃) followed by decreasing.