【摘要】 采用共沉淀法,以金属硫酸盐为原料,NaOH为沉淀剂合成SO42-插层ZnAl和MgAl类水滑石,并通过XRD、FT-IR对其结构特征进行表征.探讨合成条件以及M2+与M3+摩尔比对水滑石结构的影响.结果表明:pH值8.0,晶化温度60~80℃、晶化时间5~10 h可合成结构完整的水滑石晶相.M2+与M3+摩尔比在2~4均可合成水滑石单一晶相,但随着M2+与M3+摩尔比的增加,水滑石的层间距增大.IR测试证实,层间插层的阴离子为SO42-.更多还原

【Abstract】 SO2-4 intercalated Mg-Al and Zn-Al hydrotalcite-like compounds(HTLcs) were synthesized by coprecipitation from sulfurate and NaOH.The samples synthesized were characterized by XRD and FT-IR.The effects of varying reaction conditions on the crystal structure were investigated.The effect of M2+/M3+ on the crystal structure was also discussed.The results showed that the well crystallized HTLcs were prepared at pH=8,aged temperature in the range 60 ℃ to 80 ℃,aged time from 5 h to 10 h.The pure hydrotalcite phase could be obtained at M2+/M3+ range 2 to 4,but the interlayer spacing increased with the increase of M2+/M3+ ratio.更多还原